MCMedicalCodingSoftware
S99.921A

S99.921A: Unspecified injury of right foot, initial encounter

Billable / specific codeICD-10-CMright

S99.921A is a billable, specific ICD-10-CM code for unspecified injury of right foot, initial encounter. It is valid for submission on a claim.

Check S99.921A 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 subcategory S99.9

A
initial encounter
D
subsequent encounter
S
sequela

Risk adjustment

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

Medicare coverage

S99.921A is named in 3 Medicare coverage policies: 3 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A52996Billing and Coding: Routine Foot Care
  • A56232Billing and Coding: Foot Care
  • A56680Billing and Coding: Routine Foot Care

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under S99.921

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.