S56.101 Unspecified injury of flexor muscle, fascia and tendon of right index finger at forearm level

✓ Billable ICD-10-CM 2026
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The ICD-10-CM code for Unspecified injury of flexor muscle, fascia and tendon of right index finger at forearm level is S56.101 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Section
S50-S59: Injuries to the elbow and forearm (S50-S59)
Category S56
185 codes (144 billable)
FY2026 Status
Stable since FY2024

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

Parent Code

S56 Injury of muscle, fascia and tendon at forearm level

Related Codes in S56

S56 Injury of muscle, fascia and tendon at forearm level 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
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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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