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C06

C06: Malignant neoplasm of other and unspecified parts of mouth

Non-billable headerICD-10-CM

C06 is a non-billable header ICD-10-CM code for malignant neoplasm of other and unspecified parts of mouth. It cannot be billed on its own: choose one of the more specific child codes below.

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)

Other codes that can never be billed with C06

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

  • C14Malignant neoplasm of other and ill-defined sites in the lip, oral cavity and pharynx
  • C14.8Malignant neoplasm of overlapping sites of lip, oral cavity and pharynx

Risk adjustment

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

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead C06

5 child codes. Green means billable.

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.