MCMCB Pro
C01

C01Malignant neoplasm of base of tongue

Billable / specific codeICD-10-CM

C01 is a billable, specific ICD-10-CM code for malignant neoplasm of base of tongue. It is valid for submission on a claim.

Use additional code

Add a secondary code to capture the detail described below.

  • code to identify:
  • alcohol abuse and dependence (F10.-)
  • history of tobacco dependence (Z87.891)
  • tobacco dependence (F17.-)
  • tobacco use (Z72.0)

Inclusion terms

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

  • Malignant neoplasm of dorsal surface of base of tongue
  • Malignant neoplasm of fixed part of tongue NOS
  • Malignant neoplasm of posterior third of tongue

Risk adjustment

C01 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.

Medicare coverage

C01 is named in 59 Medicare coverage policies 59 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

  • A52450Billing and Coding: Paclitaxel (e.g., Taxol®/Abraxane ™)
  • A52479Oral Anticancer Drugs - Policy Article
  • A52479Oral Anticancer Drugs - Policy Article
  • A52479Oral Anticancer Drugs - Policy Article

Questions about C01

Is C01 a billable ICD-10-CM code?
Yes. C01 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does C01 sit in the tabular list?
Neoplasms (C00-D49), in the block Malignant neoplasms of lip, oral cavity and pharynx (C00-C14).
ICD-10-CMFY2026-Apr· effective April 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.