2027 ICD-10-CM Diagnosis Code S86Injury of muscle, fascia and tendon at lower leg level

ICD-10-CM Codes›S00–T88›S80-S89›S86

ICD-10-CM S86
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

S86 is a non-billable ICD-10-CM category code for injury of muscle, fascia and tendon at lower leg level, so it cannot be submitted on claims. Use a more specific code from this category instead, such as S86.001A, S86.001D, S86.001S, and S86.002A.

Code Identity

ICD-10-CM Code
S86
Billable Status
No — Non-Billable Category
Code Describes
Injury of muscle, fascia and tendon at lower leg level
Short Description
Injury of muscle, fascia and tendon at lower leg level
Same as the full description in the CMS dataset.
Chapter
S80-S89
Injuries to the knee and lower leg

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS80-S89Injuries to the knee and lower leg
CategoryS86Injury of muscle, fascia and tendon at lower leg level
This CodeS86Injury of muscle, fascia and tendon at lower leg level

Specific Coding for Injury of muscle, fascia and tendon at lower leg levelOverview

Non-specific codes like S86 require more characters. Use one of these billable codes instead:

  • S86.0 for Injury of Achilles tendon

  • S86.00 for Unspecified injury of Achilles tendon

  • S86.01 for Strain of Achilles tendon

  • S86.02 for Laceration of Achilles tendon

  • S86.09 for Other specified injury of Achilles tendon

  • S86.1 for Injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level

  • S86.10 for Unspecified injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level

  • S86.11 for Strain of other muscle(s) and tendon(s) of posterior muscle group at lower leg level

  • S86.12 for Laceration of other muscle(s) and tendon(s) of posterior muscle group at lower leg level

  • S86.19 for Other injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level

  • S86.2 for Injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level

  • S86.20 for Unspecified injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level

  • S86.21 for Strain of muscle(s) and tendon(s) of anterior muscle group at lower leg level

  • S86.22 for Laceration of muscle(s) and tendon(s) of anterior muscle group at lower leg level

  • S86.29 for Other injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level

  • S86.3 for Injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level

  • S86.30 for Unspecified injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level

  • S86.31 for Strain of muscle(s) and tendon(s) of peroneal muscle group at lower leg level

  • S86.32 for Laceration of muscle(s) and tendon(s) of peroneal muscle group at lower leg level

  • S86.39 for Other injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level

  • S86.8 for Injury of other muscles and tendons at lower leg level

  • S86.80 for Unspecified injury of other muscles and tendons at lower leg level

  • S86.81 for Strain of other muscles and tendons at lower leg level

  • S86.82 for Laceration of other muscles and tendons at lower leg level

  • S86.89 for Other injury of other muscles and tendons at lower leg level

  • S86.9 for Injury of unspecified muscle and tendon at lower leg level

  • S86.90 for Unspecified injury of unspecified muscle and tendon at lower leg level

  • S86.91 for Strain of unspecified muscle and tendon at lower leg level

  • S86.92 for Laceration of unspecified muscle and tendon at lower leg level

  • S86.99 for Other injury of unspecified muscle and tendon at lower leg level

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Injury of muscle, fascia and tendon at lower leg level (S86). Use the following options for the applicable episode of care:

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, published by CMS and the National Center for Health Statistics.

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to S86: its own notes plus those printed at block S80-S89 and Chapter 19. A note printed at a category, block or chapter applies to every code under it.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

On S86 itself
  • injury of muscle, fascia and tendon at ankle (S96.-)
  • injury of patellar ligament (tendon) (S76.1-)
  • sprain of joints and ligaments of knee (S83.-)
From Block S80-S89 Injuries to the knee and lower leg applies to 4,680 codes
  • burns and corrosions (T20-T32)
  • frostbite (T33-T34)
  • injuries of ankle and foot, except fracture of ankle and malleolus (S90-S99)
  • insect bite or sting, venomous (T63.4)
From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes
  • code to identify any retained foreign body, if applicable (Z18.-)

Code Also

A second code may be needed to fully describe the condition; the note gives no sequencing direction.

  • any associated open wound (S81.-)

Notes

General instructions on how these codes are used.

From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes
  • Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
  • The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.

7th Character

Every code in the category takes a 7th character from the listed values, with the placeholder X filling any empty positions before it.

  • The appropriate 7th character is to be added to each code from category S86
Values for category S86 Encounter: Initial, Subsequent, Sequela
  • Ainitial encounter
  • Dsubsequent encounter
  • Ssequela

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name S86, its category, or a range that includes it.

Excludes2 2

These codes carry an Excludes2 note naming S86: its condition is not part of those codes, and both may be reported when the patient has both.

  • S76 Injury of muscle, fascia and tendon at hip and thigh level
    injury of muscle, fascia and tendon at lower leg level (S86)
  • S83 Dislocation and sprain of joints and ligaments of knee
    strain of muscle, fascia and tendon of lower leg (S86.-)

Patient EducationClinical

Leg Injuries and Disorders

Your legs are made up of bones, blood vessels, muscles, and other connective tissue. They are important for motion and standing. Playing sports, running, falling, or having an accident can damage your legs. Common leg injuries include sprains and strains, joint dislocations, and fractures (broken bones).

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About S86Overview

What is the ICD-10 code for injury of muscle, fascia and tendon at lower leg level?

S86 is the ICD-10-CM category for injury of muscle, fascia and tendon at lower leg level, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is S86 (Injury of muscle, fascia and tendon at lower leg level) a billable code?

No. This is a category header that groups the codes for injury of muscle, fascia and tendon at lower leg level, and headers cannot be submitted on claims. Claims for injury of muscle, fascia and tendon at lower leg level need a more specific code from this category, such as S86.001A, S86.001D, and S86.001S.