Malignant neoplasm of lip (C00) ICD-10-CM
The C00 code range covers malignant neoplasm of lip with 10 ICD-10-CM diagnosis codes. 9 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Use Additional Code
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.
- code to identify:
- alcohol abuse and dependence F10
- history of tobacco dependence Z87.891
- tobacco dependence F17
- tobacco use Z72.0
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Codes in the C00 Range 10 codes · 9 billable
- C00 Malignant neoplasm of lipNon-billable
- C00.0 Malignant neoplasm of external upper lip
- C00.1 Malignant neoplasm of external lower lip
- C00.2 Malignant neoplasm of external lip, unspecified
- C00.3 Malignant neoplasm of upper lip, inner aspect
- C00.4 Malignant neoplasm of lower lip, inner aspect
- C00.5 Malignant neoplasm of lip, unspecified, inner aspect
- C00.6 Malignant neoplasm of commissure of lip, unspecified
- C00.8 Malignant neoplasm of overlapping sites of lip
- C00.9 Malignant neoplasm of lip, unspecified
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the C00 range.
Malignant Lip Neoplasm
A primary or metastatic malignant neoplasm involving the lip.
About the C00 Code Range
A malignant lip neoplasm is cancer involving the lip, whether it starts there or spreads there from elsewhere.
The subdivisions distinguish the external lip from its inner surface, then separate the upper and lower lip. External lip codes include C00.0 for the upper lip, C00.1 for the lower lip and C00.2 when neither is specified. Inner lip codes follow the same pattern: C00.3, C00.4 and C00.5. Separate codes identify the lip's corner, overlapping sites and an unspecified lip location.
Questions About This Page
How many billable codes are in the C00 range?
Of the 10 codes in this range, 9 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the C00 range classify?
The range classifies malignant neoplasm of lip. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
