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

ICD-10-CM Diagnosis Code (2025)

Official Description for S86

Injury of muscle, fascia and tendon at lower leg level

Coding Notes & Guidelines for S86

Excludes2: Not Included Here
  • injury of muscle, fascia and tendon at ankle (S96.-)
  • injury of patellar ligament (tendon) (S76.1-)
  • sprain of joints and ligaments of knee (S83.-)
Code Also

any associated open wound (S81.-)

7th Character Guidance

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

7th Character Definitions
  • A: initial encounter
  • D: subsequent encounter
  • S: sequela

Child Codes (More Specific Codes for S86):

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

About ICD-10-CM Code S86 (Injury of muscle)

ICD-10-CM code S86 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM S86 became effective on October 1, 2024.

This page provides detailed information about S86 - Injury of muscle, fascia and tendon at lower leg level. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Injury of muscle related to fascia and tendon at lower leg level.