2026 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 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

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 2026, published by CMS and the National Center for Health Statistics.

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Code Also

  • any associated open wound S81

Type 2 Excludes

  • injury of muscle, fascia and tendon at ankle S96
  • injury of patellar ligament tendon S76.1
  • sprain of joints and ligaments of knee S83

7th Character Note

  • The appropriate 7th character is to be added to each code from category S86

7th Character

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

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 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About S86Overview

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.