ICD-10-CM Tabular Index · Chapter 19 · FY 2026 S86

Injury of muscle, fascia and tendon at lower leg level (S86) ICD-10-CM

The S86 code range covers injury of muscle, fascia and tendon at lower leg level with 319 ICD-10-CM diagnosis codes. 216 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.

✓ Built from the official CMS FY 2026 datasetEffective Oct 1, 2025 – Sep 30, 2026
319
Diagnosis Codes
216
Billable Codes
S86
Code Range
S80–S89
Parent Section

Code Also

A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.

Type 2 Excludes

A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.

7th Character Note

Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.

7th Character

Indicates that a seventh character is to be assigned to codes in a subcategory.

ICD-10-CM

Codes in the S86 Range 319 codes · 216 billable

319 of 319 shown
  • S86 Injury of muscle, fascia and tendon at lower leg levelNon-billable
  • S86.0 Injury of Achilles tendonNon-billable
  • S86.00 Unspecified injury of Achilles tendonNon-billable
  • S86.001 Unspecified injury of right Achilles tendonNon-billable
  • S86.001A Unspecified injury of right Achilles tendon, initial encounter
  • S86.001D Unspecified injury of right Achilles tendon, subsequent encounter
  • S86.001S Unspecified injury of right Achilles tendon, sequela
  • S86.002 Unspecified injury of left Achilles tendonNon-billable
  • S86.002A Unspecified injury of left Achilles tendon, initial encounter
  • S86.002D Unspecified injury of left Achilles tendon, subsequent encounter
  • S86.002S Unspecified injury of left Achilles tendon, sequela
  • S86.009 Unspecified injury of unspecified Achilles tendonNon-billable
  • S86.009A Unspecified injury of unspecified Achilles tendon, initial encounter
  • S86.009D Unspecified injury of unspecified Achilles tendon, subsequent encounter
  • S86.009S Unspecified injury of unspecified Achilles tendon, sequela
  • S86.01 Strain of Achilles tendonNon-billable
  • S86.011 Strain of right Achilles tendonNon-billable
  • S86.011A Strain of right Achilles tendon, initial encounter
  • S86.011D Strain of right Achilles tendon, subsequent encounter
  • S86.011S Strain of right Achilles tendon, sequela
  • S86.012 Strain of left Achilles tendonNon-billable
  • S86.012A Strain of left Achilles tendon, initial encounter
  • S86.012D Strain of left Achilles tendon, subsequent encounter
  • S86.012S Strain of left Achilles tendon, sequela
  • S86.019 Strain of unspecified Achilles tendonNon-billable
  • S86.019A Strain of unspecified Achilles tendon, initial encounter
  • S86.019D Strain of unspecified Achilles tendon, subsequent encounter
  • S86.019S Strain of unspecified Achilles tendon, sequela
  • S86.02 Laceration of Achilles tendonNon-billable
  • S86.021 Laceration of right Achilles tendonNon-billable
  • S86.021A Laceration of right Achilles tendon, initial encounter
  • S86.021D Laceration of right Achilles tendon, subsequent encounter
  • S86.021S Laceration of right Achilles tendon, sequela
  • S86.022 Laceration of left Achilles tendonNon-billable
  • S86.022A Laceration of left Achilles tendon, initial encounter
  • S86.022D Laceration of left Achilles tendon, subsequent encounter
  • S86.022S Laceration of left Achilles tendon, sequela
  • S86.029 Laceration of unspecified Achilles tendonNon-billable
  • S86.029A Laceration of unspecified Achilles tendon, initial encounter
  • S86.029D Laceration of unspecified Achilles tendon, subsequent encounter
  • S86.029S Laceration of unspecified Achilles tendon, sequela
  • S86.09 Other specified injury of Achilles tendonNon-billable
  • S86.091 Other specified injury of right Achilles tendonNon-billable
  • S86.091A Other specified injury of right Achilles tendon, initial encounter
  • S86.091D Other specified injury of right Achilles tendon, subsequent encounter
  • S86.091S Other specified injury of right Achilles tendon, sequela
  • S86.092 Other specified injury of left Achilles tendonNon-billable
  • S86.092A Other specified injury of left Achilles tendon, initial encounter
  • S86.092D Other specified injury of left Achilles tendon, subsequent encounter
  • S86.092S Other specified injury of left Achilles tendon, sequela
  • S86.099 Other specified injury of unspecified Achilles tendonNon-billable
  • S86.099A Other specified injury of unspecified Achilles tendon, initial encounter
  • S86.099D Other specified injury of unspecified Achilles tendon, subsequent encounter
  • S86.099S Other specified injury of unspecified Achilles tendon, sequela
  • S86.1 Injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg levelNon-billable
  • S86.10 Unspecified injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg levelNon-billable
  • S86.101 Unspecified injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, right legNon-billable
  • S86.101A Unspecified injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, right leg, initial encounter
  • S86.101D Unspecified injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, right leg, subsequent encounter
  • S86.101S Unspecified injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, right leg, sequela
  • S86.102 Unspecified injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, left legNon-billable
  • S86.102A Unspecified injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, left leg, initial encounter
  • S86.102D Unspecified injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, left leg, subsequent encounter
  • S86.102S Unspecified injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, left leg, sequela
  • S86.109 Unspecified injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, unspecified legNon-billable
  • S86.109A Unspecified injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, unspecified leg, initial encounter
  • S86.109D Unspecified injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, unspecified leg, subsequent encounter
  • S86.109S Unspecified injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, unspecified leg, sequela
  • S86.11 Strain of other muscle(s) and tendon(s) of posterior muscle group at lower leg levelNon-billable
  • S86.111 Strain of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, right legNon-billable
  • S86.111A Strain of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, right leg, initial encounter
  • S86.111D Strain of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, right leg, subsequent encounter
  • S86.111S Strain of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, right leg, sequela
  • S86.112 Strain of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, left legNon-billable
  • S86.112A Strain of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, left leg, initial encounter
  • S86.112D Strain of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, left leg, subsequent encounter
  • S86.112S Strain of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, left leg, sequela
  • S86.119 Strain of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, unspecified legNon-billable
  • S86.119A Strain of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, unspecified leg, initial encounter
  • S86.119D Strain of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, unspecified leg, subsequent encounter
  • S86.119S Strain of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, unspecified leg, sequela
  • S86.12 Laceration of other muscle(s) and tendon(s) of posterior muscle group at lower leg levelNon-billable
  • S86.121 Laceration of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, right legNon-billable
  • S86.121A Laceration of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, right leg, initial encounter
  • S86.121D Laceration of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, right leg, subsequent encounter
  • S86.121S Laceration of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, right leg, sequela
  • S86.122 Laceration of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, left legNon-billable
  • S86.122A Laceration of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, left leg, initial encounter
  • S86.122D Laceration of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, left leg, subsequent encounter
  • S86.122S Laceration of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, left leg, sequela
  • S86.129 Laceration of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, unspecified legNon-billable
  • S86.129A Laceration of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, unspecified leg, initial encounter
  • S86.129D Laceration of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, unspecified leg, subsequent encounter
  • S86.129S Laceration of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, unspecified leg, sequela
  • S86.19 Other injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg levelNon-billable
  • S86.191 Other injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, right legNon-billable
  • S86.191A Other injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, right leg, initial encounter
  • S86.191D Other injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, right leg, subsequent encounter
  • S86.191S Other injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, right leg, sequela
  • S86.192 Other injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, left legNon-billable
  • S86.192A Other injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, left leg, initial encounter
  • S86.192D Other injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, left leg, subsequent encounter
  • S86.192S Other injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, left leg, sequela
  • S86.199 Other injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, unspecified legNon-billable
  • S86.199A Other injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, unspecified leg, initial encounter
  • S86.199D Other injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, unspecified leg, subsequent encounter
  • S86.199S Other injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, unspecified leg, sequela
  • S86.2 Injury of muscle(s) and tendon(s) of anterior muscle group at lower leg levelNon-billable
  • S86.20 Unspecified injury of muscle(s) and tendon(s) of anterior muscle group at lower leg levelNon-billable
  • S86.201 Unspecified injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right legNon-billable
  • S86.201A Unspecified injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right leg, initial encounter
  • S86.201D Unspecified injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right leg, subsequent encounter
  • S86.201S Unspecified injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right leg, sequela
  • S86.202 Unspecified injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, left legNon-billable
  • S86.202A Unspecified injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, left leg, initial encounter
  • S86.202D Unspecified injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, left leg, subsequent encounter
  • S86.202S Unspecified injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, left leg, sequela
  • S86.209 Unspecified injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, unspecified legNon-billable
  • S86.209A Unspecified injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, unspecified leg, initial encounter
  • S86.209D Unspecified injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, unspecified leg, subsequent encounter
  • S86.209S Unspecified injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, unspecified leg, sequela
  • S86.21 Strain of muscle(s) and tendon(s) of anterior muscle group at lower leg levelNon-billable
  • S86.211 Strain of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right legNon-billable
  • S86.211A Strain of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right leg, initial encounter
  • S86.211D Strain of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right leg, subsequent encounter
  • S86.211S Strain of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right leg, sequela
  • S86.212 Strain of muscle(s) and tendon(s) of anterior muscle group at lower leg level, left legNon-billable
  • S86.212A Strain of muscle(s) and tendon(s) of anterior muscle group at lower leg level, left leg, initial encounter
  • S86.212D Strain of muscle(s) and tendon(s) of anterior muscle group at lower leg level, left leg, subsequent encounter
  • S86.212S Strain of muscle(s) and tendon(s) of anterior muscle group at lower leg level, left leg, sequela
  • S86.219 Strain of muscle(s) and tendon(s) of anterior muscle group at lower leg level, unspecified legNon-billable
  • S86.219A Strain of muscle(s) and tendon(s) of anterior muscle group at lower leg level, unspecified leg, initial encounter
  • S86.219D Strain of muscle(s) and tendon(s) of anterior muscle group at lower leg level, unspecified leg, subsequent encounter
  • S86.219S Strain of muscle(s) and tendon(s) of anterior muscle group at lower leg level, unspecified leg, sequela
  • S86.22 Laceration of muscle(s) and tendon(s) of anterior muscle group at lower leg levelNon-billable
  • S86.221 Laceration of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right legNon-billable
  • S86.221A Laceration of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right leg, initial encounter
  • S86.221D Laceration of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right leg, subsequent encounter
  • S86.221S Laceration of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right leg, sequela
  • S86.222 Laceration of muscle(s) and tendon(s) of anterior muscle group at lower leg level, left legNon-billable
  • S86.222A Laceration of muscle(s) and tendon(s) of anterior muscle group at lower leg level, left leg, initial encounter
  • S86.222D Laceration of muscle(s) and tendon(s) of anterior muscle group at lower leg level, left leg, subsequent encounter
  • S86.222S Laceration of muscle(s) and tendon(s) of anterior muscle group at lower leg level, left leg, sequela
  • S86.229 Laceration of muscle(s) and tendon(s) of anterior muscle group at lower leg level, unspecified legNon-billable
  • S86.229A Laceration of muscle(s) and tendon(s) of anterior muscle group at lower leg level, unspecified leg, initial encounter
  • S86.229D Laceration of muscle(s) and tendon(s) of anterior muscle group at lower leg level, unspecified leg, subsequent encounter
  • S86.229S Laceration of muscle(s) and tendon(s) of anterior muscle group at lower leg level, unspecified leg, sequela
  • S86.29 Other injury of muscle(s) and tendon(s) of anterior muscle group at lower leg levelNon-billable
  • S86.291 Other injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right legNon-billable
  • S86.291A Other injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right leg, initial encounter
  • S86.291D Other injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right leg, subsequent encounter
  • S86.291S Other injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right leg, sequela
  • S86.292 Other injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, left legNon-billable
  • S86.292A Other injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, left leg, initial encounter
  • S86.292D Other injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, left leg, subsequent encounter
  • S86.292S Other injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, left leg, sequela
  • S86.299 Other injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, unspecified legNon-billable
  • S86.299A Other injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, unspecified leg, initial encounter
  • S86.299D Other injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, unspecified leg, subsequent encounter
  • S86.299S Other injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, unspecified leg, sequela
  • S86.3 Injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg levelNon-billable
  • S86.30 Unspecified injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg levelNon-billable
  • S86.301 Unspecified injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, right legNon-billable
  • S86.301A Unspecified injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, right leg, initial encounter
  • S86.301D Unspecified injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, right leg, subsequent encounter
  • S86.301S Unspecified injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, right leg, sequela
  • S86.302 Unspecified injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, left legNon-billable
  • S86.302A Unspecified injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, left leg, initial encounter
  • S86.302D Unspecified injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, left leg, subsequent encounter
  • S86.302S Unspecified injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, left leg, sequela
  • S86.309 Unspecified injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, unspecified legNon-billable
  • S86.309A Unspecified injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, unspecified leg, initial encounter
  • S86.309D Unspecified injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, unspecified leg, subsequent encounter
  • S86.309S Unspecified injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, unspecified leg, sequela
  • S86.31 Strain of muscle(s) and tendon(s) of peroneal muscle group at lower leg levelNon-billable
  • S86.311 Strain of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, right legNon-billable
  • S86.311A Strain of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, right leg, initial encounter
  • S86.311D Strain of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, right leg, subsequent encounter
  • S86.311S Strain of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, right leg, sequela
  • S86.312 Strain of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, left legNon-billable
  • S86.312A Strain of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, left leg, initial encounter
  • S86.312D Strain of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, left leg, subsequent encounter
  • S86.312S Strain of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, left leg, sequela
  • S86.319 Strain of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, unspecified legNon-billable
  • S86.319A Strain of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, unspecified leg, initial encounter
  • S86.319D Strain of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, unspecified leg, subsequent encounter
  • S86.319S Strain of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, unspecified leg, sequela
  • S86.32 Laceration of muscle(s) and tendon(s) of peroneal muscle group at lower leg levelNon-billable
  • S86.321 Laceration of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, right legNon-billable
  • S86.321A Laceration of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, right leg, initial encounter
  • S86.321D Laceration of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, right leg, subsequent encounter
  • S86.321S Laceration of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, right leg, sequela
  • S86.322 Laceration of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, left legNon-billable
  • S86.322A Laceration of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, left leg, initial encounter
  • S86.322D Laceration of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, left leg, subsequent encounter
  • S86.322S Laceration of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, left leg, sequela
  • S86.329 Laceration of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, unspecified legNon-billable
  • S86.329A Laceration of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, unspecified leg, initial encounter
  • S86.329D Laceration of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, unspecified leg, subsequent encounter
  • S86.329S Laceration of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, unspecified leg, sequela
  • S86.39 Other injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg levelNon-billable
  • S86.391 Other injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, right legNon-billable
  • S86.391A Other injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, right leg, initial encounter
  • S86.391D Other injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, right leg, subsequent encounter
  • S86.391S Other injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, right leg, sequela
  • S86.392 Other injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, left legNon-billable
  • S86.392A Other injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, left leg, initial encounter
  • S86.392D Other injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, left leg, subsequent encounter
  • S86.392S Other injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, left leg, sequela
  • S86.399 Other injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, unspecified legNon-billable
  • S86.399A Other injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, unspecified leg, initial encounter
  • S86.399D Other injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, unspecified leg, subsequent encounter
  • S86.399S Other injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, unspecified leg, sequela
  • S86.8 Injury of other muscles and tendons at lower leg levelNon-billable
  • S86.80 Unspecified injury of other muscles and tendons at lower leg levelNon-billable
  • S86.801 Unspecified injury of other muscle(s) and tendon(s) at lower leg level, right legNon-billable
  • S86.801A Unspecified injury of other muscle(s) and tendon(s) at lower leg level, right leg, initial encounter
  • S86.801D Unspecified injury of other muscle(s) and tendon(s) at lower leg level, right leg, subsequent encounter
  • S86.801S Unspecified injury of other muscle(s) and tendon(s) at lower leg level, right leg, sequela
  • S86.802 Unspecified injury of other muscle(s) and tendon(s) at lower leg level, left legNon-billable
  • S86.802A Unspecified injury of other muscle(s) and tendon(s) at lower leg level, left leg, initial encounter
  • S86.802D Unspecified injury of other muscle(s) and tendon(s) at lower leg level, left leg, subsequent encounter
  • S86.802S Unspecified injury of other muscle(s) and tendon(s) at lower leg level, left leg, sequela
  • S86.809 Unspecified injury of other muscle(s) and tendon(s) at lower leg level, unspecified legNon-billable
  • S86.809A Unspecified injury of other muscle(s) and tendon(s) at lower leg level, unspecified leg, initial encounter
  • S86.809D Unspecified injury of other muscle(s) and tendon(s) at lower leg level, unspecified leg, subsequent encounter
  • S86.809S Unspecified injury of other muscle(s) and tendon(s) at lower leg level, unspecified leg, sequela
  • S86.81 Strain of other muscles and tendons at lower leg levelNon-billable
  • S86.811 Strain of other muscle(s) and tendon(s) at lower leg level, right legNon-billable
  • S86.811A Strain of other muscle(s) and tendon(s) at lower leg level, right leg, initial encounter
  • S86.811D Strain of other muscle(s) and tendon(s) at lower leg level, right leg, subsequent encounter
  • S86.811S Strain of other muscle(s) and tendon(s) at lower leg level, right leg, sequela
  • S86.812 Strain of other muscle(s) and tendon(s) at lower leg level, left legNon-billable
  • S86.812A Strain of other muscle(s) and tendon(s) at lower leg level, left leg, initial encounter
  • S86.812D Strain of other muscle(s) and tendon(s) at lower leg level, left leg, subsequent encounter
  • S86.812S Strain of other muscle(s) and tendon(s) at lower leg level, left leg, sequela
  • S86.819 Strain of other muscle(s) and tendon(s) at lower leg level, unspecified legNon-billable
  • S86.819A Strain of other muscle(s) and tendon(s) at lower leg level, unspecified leg, initial encounter
  • S86.819D Strain of other muscle(s) and tendon(s) at lower leg level, unspecified leg, subsequent encounter
  • S86.819S Strain of other muscle(s) and tendon(s) at lower leg level, unspecified leg, sequela
  • S86.82 Laceration of other muscles and tendons at lower leg levelNon-billable
  • S86.821 Laceration of other muscle(s) and tendon(s) at lower leg level, right legNon-billable
  • S86.821A Laceration of other muscle(s) and tendon(s) at lower leg level, right leg, initial encounter
  • S86.821D Laceration of other muscle(s) and tendon(s) at lower leg level, right leg, subsequent encounter
  • S86.821S Laceration of other muscle(s) and tendon(s) at lower leg level, right leg, sequela
  • S86.822 Laceration of other muscle(s) and tendon(s) at lower leg level, left legNon-billable
  • S86.822A Laceration of other muscle(s) and tendon(s) at lower leg level, left leg, initial encounter
  • S86.822D Laceration of other muscle(s) and tendon(s) at lower leg level, left leg, subsequent encounter
  • S86.822S Laceration of other muscle(s) and tendon(s) at lower leg level, left leg, sequela
  • S86.829 Laceration of other muscle(s) and tendon(s) at lower leg level, unspecified legNon-billable
  • S86.829A Laceration of other muscle(s) and tendon(s) at lower leg level, unspecified leg, initial encounter
  • S86.829D Laceration of other muscle(s) and tendon(s) at lower leg level, unspecified leg, subsequent encounter
  • S86.829S Laceration of other muscle(s) and tendon(s) at lower leg level, unspecified leg, sequela
  • S86.89 Other injury of other muscles and tendons at lower leg levelNon-billable
  • S86.891 Other injury of other muscle(s) and tendon(s) at lower leg level, right legNon-billable
  • S86.891A Other injury of other muscle(s) and tendon(s) at lower leg level, right leg, initial encounter
  • S86.891D Other injury of other muscle(s) and tendon(s) at lower leg level, right leg, subsequent encounter
  • S86.891S Other injury of other muscle(s) and tendon(s) at lower leg level, right leg, sequela
  • S86.892 Other injury of other muscle(s) and tendon(s) at lower leg level, left legNon-billable
  • S86.892A Other injury of other muscle(s) and tendon(s) at lower leg level, left leg, initial encounter
  • S86.892D Other injury of other muscle(s) and tendon(s) at lower leg level, left leg, subsequent encounter
  • S86.892S Other injury of other muscle(s) and tendon(s) at lower leg level, left leg, sequela
  • S86.899 Other injury of other muscle(s) and tendon(s) at lower leg level, unspecified legNon-billable
  • S86.899A Other injury of other muscle(s) and tendon(s) at lower leg level, unspecified leg, initial encounter
  • S86.899D Other injury of other muscle(s) and tendon(s) at lower leg level, unspecified leg, subsequent encounter
  • S86.899S Other injury of other muscle(s) and tendon(s) at lower leg level, unspecified leg, sequela
  • S86.9 Injury of unspecified muscle and tendon at lower leg levelNon-billable
  • S86.90 Unspecified injury of unspecified muscle and tendon at lower leg levelNon-billable
  • S86.901 Unspecified injury of unspecified muscle(s) and tendon(s) at lower leg level, right legNon-billable
  • S86.901A Unspecified injury of unspecified muscle(s) and tendon(s) at lower leg level, right leg, initial encounter
  • S86.901D Unspecified injury of unspecified muscle(s) and tendon(s) at lower leg level, right leg, subsequent encounter
  • S86.901S Unspecified injury of unspecified muscle(s) and tendon(s) at lower leg level, right leg, sequela
  • S86.902 Unspecified injury of unspecified muscle(s) and tendon(s) at lower leg level, left legNon-billable
  • S86.902A Unspecified injury of unspecified muscle(s) and tendon(s) at lower leg level, left leg, initial encounter
  • S86.902D Unspecified injury of unspecified muscle(s) and tendon(s) at lower leg level, left leg, subsequent encounter
  • S86.902S Unspecified injury of unspecified muscle(s) and tendon(s) at lower leg level, left leg, sequela
  • S86.909 Unspecified injury of unspecified muscle(s) and tendon(s) at lower leg level, unspecified legNon-billable
  • S86.909A Unspecified injury of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg, initial encounter
  • S86.909D Unspecified injury of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg, subsequent encounter
  • S86.909S Unspecified injury of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg, sequela
  • S86.91 Strain of unspecified muscle and tendon at lower leg levelNon-billable
  • S86.911 Strain of unspecified muscle(s) and tendon(s) at lower leg level, right legNon-billable
  • S86.911A Strain of unspecified muscle(s) and tendon(s) at lower leg level, right leg, initial encounter
  • S86.911D Strain of unspecified muscle(s) and tendon(s) at lower leg level, right leg, subsequent encounter
  • S86.911S Strain of unspecified muscle(s) and tendon(s) at lower leg level, right leg, sequela
  • S86.912 Strain of unspecified muscle(s) and tendon(s) at lower leg level, left legNon-billable
  • S86.912A Strain of unspecified muscle(s) and tendon(s) at lower leg level, left leg, initial encounter
  • S86.912D Strain of unspecified muscle(s) and tendon(s) at lower leg level, left leg, subsequent encounter
  • S86.912S Strain of unspecified muscle(s) and tendon(s) at lower leg level, left leg, sequela
  • S86.919 Strain of unspecified muscle(s) and tendon(s) at lower leg level, unspecified legNon-billable
  • S86.919A Strain of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg, initial encounter
  • S86.919D Strain of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg, subsequent encounter
  • S86.919S Strain of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg, sequela
  • S86.92 Laceration of unspecified muscle and tendon at lower leg levelNon-billable
  • S86.921 Laceration of unspecified muscle(s) and tendon(s) at lower leg level, right legNon-billable
  • S86.921A Laceration of unspecified muscle(s) and tendon(s) at lower leg level, right leg, initial encounter
  • S86.921D Laceration of unspecified muscle(s) and tendon(s) at lower leg level, right leg, subsequent encounter
  • S86.921S Laceration of unspecified muscle(s) and tendon(s) at lower leg level, right leg, sequela
  • S86.922 Laceration of unspecified muscle(s) and tendon(s) at lower leg level, left legNon-billable
  • S86.922A Laceration of unspecified muscle(s) and tendon(s) at lower leg level, left leg, initial encounter
  • S86.922D Laceration of unspecified muscle(s) and tendon(s) at lower leg level, left leg, subsequent encounter
  • S86.922S Laceration of unspecified muscle(s) and tendon(s) at lower leg level, left leg, sequela
  • S86.929 Laceration of unspecified muscle(s) and tendon(s) at lower leg level, unspecified legNon-billable
  • S86.929A Laceration of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg, initial encounter
  • S86.929D Laceration of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg, subsequent encounter
  • S86.929S Laceration of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg, sequela
  • S86.99 Other injury of unspecified muscle and tendon at lower leg levelNon-billable
  • S86.991 Other injury of unspecified muscle(s) and tendon(s) at lower leg level, right legNon-billable
  • S86.991A Other injury of unspecified muscle(s) and tendon(s) at lower leg level, right leg, initial encounter
  • S86.991D Other injury of unspecified muscle(s) and tendon(s) at lower leg level, right leg, subsequent encounter
  • S86.991S Other injury of unspecified muscle(s) and tendon(s) at lower leg level, right leg, sequela
  • S86.992 Other injury of unspecified muscle(s) and tendon(s) at lower leg level, left legNon-billable
  • S86.992A Other injury of unspecified muscle(s) and tendon(s) at lower leg level, left leg, initial encounter
  • S86.992D Other injury of unspecified muscle(s) and tendon(s) at lower leg level, left leg, subsequent encounter
  • S86.992S Other injury of unspecified muscle(s) and tendon(s) at lower leg level, left leg, sequela
  • S86.999 Other injury of unspecified muscle(s) and tendon(s) at lower leg level, unspecified legNon-billable
  • S86.999A Other injury of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg, initial encounter
  • S86.999D Other injury of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg, subsequent encounter
  • S86.999S Other injury of unspecified muscle(s) and tendon(s) at lower leg level, unspecified leg, sequela

Clinical Terms in This Code Range

Definitions from the National Library of Medicine for conditions coded in the S86 range.

Medial Tibial Stress Syndrome

SKELETAL MUSCLE pain and tenderness along the posteromedial TIBIA resulting from exercise such as running and other physical activity.

About the S86 Code Range

ICD-10 code section S86 covers injuries to the muscles, fascia, and tendons of the lower leg. This section includes various types of damage such as strains, lacerations, and unspecified injuries affecting specific tendon groups and muscles, notably the Achilles tendon and muscles in the anterior, posterior, and peroneal compartments of the lower leg.

The ICD-10 code for injury of Achilles tendon (S86.0) includes specific codes for right or left side injuries and varying encounter types (initial, subsequent, sequela). Conditions commonly referenced under this section include Achilles tendon strains, lacerations, and ruptures. For example, "injury of right Achilles tendon" corresponds to S86.001, a key code for this condition. Similarly, strains (such as "strain of right Achilles tendon") and lacerations are differentiated with unique codes that help specify location and severity. Beyond the Achilles tendon, codes for injuries to other muscle groups at the lower leg level allow precise classification of strains, lacerations, and other injuries to the posterior, anterior, and peroneal muscles and tendons. Synonyms like "medial tibial stress syndrome" or "rupture of gastrocnemius muscle" link clinical terms to these codes, aiding medical coders in identifying the correct ICD-10 code for specific lower leg muscle and tendon injuries.

Questions About This Page

How many billable codes are in the S86 range?

Of the 319 codes in this range, 216 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.

What does the S86 range classify?

The range classifies injury of muscle, fascia and tendon at lower leg level. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.

Related References

All ICD-10-CM ChaptersAll of Chapter 19ICD-10-CM Code LookupMS-DRG ReferenceMedicare Code EditsPOA Exempt Codes

Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.