S86 Injury of muscle, fascia and tendon at lower leg level

⚠ Non-Billable ICD-10-CM 2026
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The ICD-10-CM code for Injury of muscle, fascia and tendon at lower leg level is S86 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Section
S80-S89: Injuries to the knee and lower leg (S80-S89)
Category S86
103 codes (72 billable)
FY2026 Status
Stable since FY2024
Excludes2
Not included here. These conditions are coded elsewhere but may be coded together if applicable.
  • 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.-)

Official Coding Guidelines

Sequence blood vessel/nerve injury first (fragment)

injury is to the blood vessels or nerves, that injury should be sequenced first.

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.19.b.2
Do not assign injury codes for iatrogenic injuries; code complication

3) Iatrogenic injuries Injury codes from Chapter 19 should not be assigned for injuries that occur during, or as a result of, a medical intervention. Assign the appropriate complication code(s).

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.19.b.3

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Related Codes

More Specific Codes

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

Related Codes in 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
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2025-10-01

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