MCMedicalCodingSoftware
C44.520

C44.520: Squamous cell carcinoma of anal skin

Billable / specific codeICD-10-CM

C44.520 is a billable, specific ICD-10-CM code for squamous cell carcinoma of anal skin. It is valid for submission on a claim.

Check C44.520 with the rest of the claim: free scrubber

Inclusion terms

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

  • Squamous cell carcinoma of anal margin
  • Squamous cell carcinoma of perianal skin

Excludes1 inherited from the categories above C44.520

A category’s note binds every code beneath it.

Written on C44.5: Other and unspecified malignant neoplasm of skin of trunk

Written on C44: Other and unspecified malignant neoplasm of skin

  • Kaposi's sarcoma of skin (C46.0)
  • malignant melanoma of skin (C43.-)
  • malignant neoplasm of skin of genital organs (C51-C52, C60.-, C63.2)
  • Merkel cell carcinoma (C4A.-)

Other codes that can never be billed with C44.520

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • C76Malignant neoplasm of other and ill-defined sites

Risk adjustment

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

Medicare coverage

C44.520 is named in 76 Medicare coverage policies: 72 listing it as supporting medical necessity, and 4 listing it as NOT covered. Which one applies depends on your Medicare contractor.

  • A59380Billing and Coding: MolDX: Molecular Biomarker Testing for Risk Stratification of Cutaneous Squamous Cell Carcinomanot covered
  • A59382Billing and Coding: MolDX: Molecular Biomarker Testing for Risk Stratification of Cutaneous Squamous Cell Carcinomanot covered
  • A59386Billing and Coding: MolDX: Molecular Biomarker Testing for Risk Stratification of Cutaneous Squamous Cell Carcinomanot covered
  • A59429Billing and Coding: MolDX: Molecular Biomarker Testing for Risk Stratification of Cutaneous Squamous Cell Carcinomanot covered

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under C44.52

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.