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C09.8

C09.8: Malignant neoplasm of overlapping sites of tonsil

Billable / specific codeICD-10-CM

C09.8 is a billable, specific ICD-10-CM code for malignant neoplasm of overlapping sites of tonsil. It is valid for submission on a claim.

Check C09.8 with the rest of the claim: free scrubber

Excludes2 inherited from the categories above C09.8

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

Written on C09: Malignant neoplasm of tonsil

  • malignant neoplasm of lingual tonsil (C02.4)
  • malignant neoplasm of pharyngeal tonsil (C11.1)

Risk adjustment

C09.8 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

  • HCC 21 Lymphoma and Other Cancers0.671 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score. Look up the whole chart to see which of its HCCs the hierarchy would zero.

Medicare coverage

C09.8 is named in 58 Medicare coverage policies: 58 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A52450Billing and Coding: Paclitaxel (e.g., Taxol®/Abraxane ™)
  • A52479Oral Anticancer Drugs - Policy Article
  • A52480Oral Antiemetic Drugs (Replacement for Intravenous Antiemetics) - Policy Article
  • A54111Billing and Coding: Speech Language Pathology (SLP) Services: Communication Disorders

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under C09

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.