S56 Injury of muscle, fascia and tendon at forearm level

⚠ Non-Billable ICD-10-CM 2026
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The ICD-10-CM code for Injury of muscle, fascia and tendon at forearm level is S56 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Section
S50-S59: Injuries to the elbow and forearm (S50-S59)
Category S56
185 codes (144 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 or below wrist (S66.-)
  • sprain of joints and ligaments of elbow (S53.4-)
Code Also
  • any associated open wound (S51.-)

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

S56.0 Injury of flexor muscle, fascia and tendon of thumb at forearm level S56.00 Unspecified injury of flexor muscle, fascia and tendon of thumb at forearm level S56.001 Unspecified injury of flexor muscle, fascia and tendon of right thumb at forearm level S56.002 Unspecified injury of flexor muscle, fascia and tendon of left thumb at forearm level S56.009 Unspecified injury of flexor muscle, fascia and tendon of unspecified thumb at forearm level S56.01 Strain of flexor muscle, fascia and tendon of thumb at forearm level S56.011 Strain of flexor muscle, fascia and tendon of right thumb at forearm level S56.012 Strain of flexor muscle, fascia and tendon of left thumb at forearm level S56.019 Strain of flexor muscle, fascia and tendon of unspecified thumb at forearm level S56.02 Laceration of flexor muscle, fascia and tendon of thumb at forearm level S56.021 Laceration of flexor muscle, fascia and tendon of right thumb at forearm level S56.022 Laceration of flexor muscle, fascia and tendon of left thumb at forearm level S56.029 Laceration of flexor muscle, fascia and tendon of unspecified thumb at forearm level S56.09 Other injury of flexor muscle, fascia and tendon of thumb at forearm level S56.091 Other injury of flexor muscle, fascia and tendon of right thumb at forearm level S56.092 Other injury of flexor muscle, fascia and tendon of left thumb at forearm level S56.099 Other injury of flexor muscle, fascia and tendon of unspecified thumb at forearm level S56.1 Injury of flexor muscle, fascia and tendon of other and unspecified finger at forearm level S56.10 Unspecified injury of flexor muscle, fascia and tendon of other and unspecified finger at forearm level S56.101 Unspecified injury of flexor muscle, fascia and tendon of right index finger at forearm level S56.102 Unspecified injury of flexor muscle, fascia and tendon of left index finger at forearm level S56.103 Unspecified injury of flexor muscle, fascia and tendon of right middle finger at forearm level S56.104 Unspecified injury of flexor muscle, fascia and tendon of left middle finger at forearm level S56.105 Unspecified injury of flexor muscle, fascia and tendon of right ring finger at forearm level S56.106 Unspecified injury of flexor muscle, fascia and tendon of left ring finger at forearm level S56.107 Unspecified injury of flexor muscle, fascia and tendon of right little finger at forearm level S56.108 Unspecified injury of flexor muscle, fascia and tendon of left little finger at forearm level S56.109 Unspecified injury of flexor muscle, fascia and tendon of unspecified finger at forearm level S56.11 Strain of flexor muscle, fascia and tendon of other and unspecified finger at forearm level S56.111 Strain of flexor muscle, fascia and tendon of right index finger at forearm level

Related Codes in S56

S56.0 Injury of flexor muscle, fascia and tendon of thumb at forearm level S56.00 Unspecified injury of flexor muscle, fascia and tendon of thumb at forearm level S56.001 Unspecified injury of flexor muscle, fascia and tendon of right thumb at forearm level S56.002 Unspecified injury of flexor muscle, fascia and tendon of left thumb at forearm level S56.009 Unspecified injury of flexor muscle, fascia and tendon of unspecified thumb at forearm level S56.01 Strain of flexor muscle, fascia and tendon of thumb at forearm level S56.011 Strain of flexor muscle, fascia and tendon of right thumb at forearm level S56.012 Strain of flexor muscle, fascia and tendon of left thumb at forearm level S56.019 Strain of flexor muscle, fascia and tendon of unspecified thumb at forearm level S56.02 Laceration of flexor muscle, fascia and tendon of thumb at forearm level S56.021 Laceration of flexor muscle, fascia and tendon of right thumb at forearm level S56.022 Laceration of flexor muscle, fascia and tendon of left thumb at forearm level S56.029 Laceration of flexor muscle, fascia and tendon of unspecified thumb at forearm level S56.09 Other injury of flexor muscle, fascia and tendon of thumb at forearm level S56.091 Other injury of flexor muscle, fascia and tendon of right thumb at forearm level S56.092 Other injury of flexor muscle, fascia and tendon of left thumb at forearm level S56.099 Other injury of flexor muscle, fascia and tendon of unspecified thumb at forearm level S56.1 Injury of flexor muscle, fascia and tendon of other and unspecified finger at forearm level S56.10 Unspecified injury of flexor muscle, fascia and tendon of other and unspecified finger at forearm level S56.101 Unspecified injury of flexor muscle, fascia and tendon of right index finger at forearm level
Search all 70,000+ ICD-10-CM codes →
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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