ICD-10-CM 2027 diagnosis code
S86Injury of muscle, fascia and tendon at lower leg level
S86 is a header code, so it can't be reported by itself. Choose one of the 6 more specific codes beneath it.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About S86
S86 is the ICD-10-CM diagnosis code for injury of muscle, fascia and tendon at lower leg level. It belongs to block S80-S89 (injuries to the knee and lower leg) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 6 subcodes must be used instead.
To report this condition, pick the subcode that matches the documentation: S86.0 (tendon), S86.1 (level), S86.2 (level), S86.3 (level), S86.8 (level) and S86.9 (level).
The conditions in its Excludes2 note aren't part of S86, but may be coded alongside it if the patient has both: injury of muscle, fascia and tendon at ankle (S96.-), injury of patellar ligament (tendon) (S76.1-) and sprain of joints and ligaments of knee (S83.-).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Specific codes under S86
- S86.0Injury of Achilles tendon
- S86.1Injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level
- S86.10Unspecified injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level
- S86.101Unspecified injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, right leg
- S86.102Unspecified injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, left leg
- S86.109Unspecified injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, unspecified leg
- S86.11Strain of other muscle(s) and tendon(s) of posterior muscle group at lower leg level
- S86.111Strain of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, right leg
- S86.112Strain of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, left leg
- S86.119Strain of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, unspecified leg
- S86.12Laceration of other muscle(s) and tendon(s) of posterior muscle group at lower leg level
- S86.121Laceration of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, right leg
- S86.122Laceration of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, left leg
- S86.129Laceration of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, unspecified leg
- S86.19Other injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level
- S86.191Other injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, right leg
- S86.192Other injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, left leg
- S86.199Other injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level, unspecified leg
- S86.10Unspecified injury of other muscle(s) and tendon(s) of posterior muscle group at lower leg level
- S86.2Injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level
- S86.20Unspecified injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level
- S86.201Unspecified injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right leg
- S86.202Unspecified injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, left leg
- S86.209Unspecified injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, unspecified leg
- S86.21Strain of muscle(s) and tendon(s) of anterior muscle group at lower leg level
- S86.22Laceration of muscle(s) and tendon(s) of anterior muscle group at lower leg level
- S86.221Laceration of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right leg
- S86.222Laceration of muscle(s) and tendon(s) of anterior muscle group at lower leg level, left leg
- S86.229Laceration of muscle(s) and tendon(s) of anterior muscle group at lower leg level, unspecified leg
- S86.29Other injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level
- S86.291Other injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, right leg
- S86.292Other injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, left leg
- S86.299Other injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, unspecified leg
- S86.20Unspecified injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level
- S86.3Injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level
- S86.30Unspecified injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level
- S86.301Unspecified injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, right leg
- S86.302Unspecified injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, left leg
- S86.309Unspecified injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, unspecified leg
- S86.31Strain of muscle(s) and tendon(s) of peroneal muscle group at lower leg level
- S86.32Laceration of muscle(s) and tendon(s) of peroneal muscle group at lower leg level
- S86.321Laceration of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, right leg
- S86.322Laceration of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, left leg
- S86.329Laceration of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, unspecified leg
- S86.39Other injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level
- S86.391Other injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, right leg
- S86.392Other injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, left leg
- S86.399Other injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level, unspecified leg
- S86.30Unspecified injury of muscle(s) and tendon(s) of peroneal muscle group at lower leg level
- S86.8Injury of other muscles and tendons at lower leg level
- S86.9Injury of unspecified muscle and tendon at lower leg level
Coding notes
- any associated open wound (S81.-)
Notes that apply from higher levels
Instructions written at a parent level also apply to S86.
Broader instructions also apply from S80-S89 Injuries to the knee and lower leg and Chapter 19: Injury, poisoning and certain other consequences of external causes.
Codes whose notes reference S86
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about S86
Is S86 billable?
- No. S86 is a header code. Report one of its more specific subcodes instead.