MCMedicalCodingSoftware
S66.528A

S66.528A: Laceration of intrinsic muscle, fascia and tendon of other finger at wrist and hand level, initial encounter

Billable / specific codeICD-10-CM

S66.528A is a billable, specific ICD-10-CM code for laceration of intrinsic muscle, fascia and tendon of other finger at wrist and hand level, initial encounter. It is valid for submission on a claim.

Check S66.528A with the rest of the claim: free scrubber

7th character "A": initial encounter

The appropriate 7th character is to be added to each code from category S66

A
initial encounter
D
subsequent encounter
S
sequela

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Laceration of intrinsic muscle, fascia and tendon of specified finger with unspecified laterality at wrist and hand level

Excludes2 inherited from the categories above S66.528A

Not part of this code, but both may be coded when both are present.

Written on S66.5: Injury of intrinsic muscle, fascia and tendon of other and unspecified finger at wrist and hand level

  • injury of intrinsic muscle, fascia and tendon of thumb at wrist and hand level (S66.4-)

Written on S66: Injury of muscle, fascia and tendon at wrist and hand level

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

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

S66.528A is named in 2 Medicare coverage policies: 2 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A56459Billing and Coding: Debridement Services
  • A57554Billing and Coding: Immune Globulins

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under S66.528

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.