U.S. ICD-10-CM · FY 2027

S66 ICD-10-CM Code: Injury of muscle, fascia and tendon at wrist and hand level

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

S66

Injury of muscle, fascia and tendon at wrist and hand level

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where S66 sits

  1. 1

    Chapter 19

    Injury, poisoning and certain other consequences of external causes (S00-T88)

  2. 2

    Section

    Injuries to the wrist, hand and fingers (S60-S69)

  3. 3

    Category S66

    Injury of muscle, fascia and tendon at wrist and hand level

  4. 4

    Code S66

    Injury of muscle, fascia and tendon at wrist and hand level

More specific choices

Codes under S66

S66 is a non-billable category. Choose the child code that best matches the documented diagnosis.

S66.0

Injury of long flexor muscle, fascia and tendon of thumb at wrist and hand level

S66.1

Injury of flexor muscle, fascia and tendon of other and unspecified finger at wrist and hand level

S66.2

Injury of extensor muscle, fascia and tendon of thumb at wrist and hand level

S66.3

Injury of extensor muscle, fascia and tendon of other and unspecified finger at wrist and hand level

S66.4

Injury of intrinsic muscle, fascia and tendon of thumb at wrist and hand level

S66.5

Injury of intrinsic muscle, fascia and tendon of other and unspecified finger at wrist and hand level

S66.8

Injury of other specified muscles, fascia and tendons at wrist and hand level

S66.9

Injury of unspecified muscle, fascia and tendon at wrist and hand level

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for S66.

Code first

No “code first” instruction is listed for S66.

Use additional code

No “use additional code” instruction is listed for S66.

Excludes1

Conditions that should not be reported together with this code.

No Excludes1 note is listed for S66.

Excludes2

Conditions not included here that may be reported separately when present.

  • sprain of joints and ligaments of wrist and hand (S63.-)

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

Publisher

Vero Scribe Inc.

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code S66 mean?

S66 is the FY 2027 U.S. ICD-10-CM code for “Injury of muscle, fascia and tendon at wrist and hand level.”

Is S66 a billable or specific ICD-10-CM code?

No. S66 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is S66 located in ICD-10-CM?

S66 is listed in Chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88), within Injuries to the wrist, hand and fingers (S60-S69) (S60–S69), under category S66, Injury of muscle, fascia and tendon at wrist and hand level.

What coding notes are listed for S66?

No inclusion terms are listed for S66 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. Excludes2 notes: sprain of joints and ligaments of wrist and hand (S63.-).

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