C00 ICD-10-CM Code: Malignant neoplasm of lip
C00 is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · free HCC coding tools
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FY 2026 Apr update / Neoplasms (C00-D49) / Malignant neoplasms of lip, oral cavity and pharynx (C00-C14)
C00
Header CodeICD-10-CMOfficial ICD-10-CMCodebook guidanceMalignant neoplasm of lip
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
N/A—
Not mapped
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
OfficialNo inclusion terms are included in this display for C00. Check the code and parent instructions in the Code Book.
Excludes 2
OfficialNo Excludes 2 notes are included in this display for C00. Check the code and parent instructions in the Code Book.
Related Codes
Includes
OfficialNo Includes notes are included in this display for C00. Check the code and parent instructions in the Code Book.
Excludes 1
Official- malignant melanoma of lip (C43.0)
- Merkel cell carcinoma of lip (C4A.0)
- other and unspecified malignant neoplasm of skin of lip (C44.0-)
Code First
OfficialNo Code First sequencing instructions are included in this display for C00. Check the code and parent instructions in the Code Book.
Use Additional
Official- code to identify:
- alcohol abuse and dependence (F10.-)
- history of tobacco dependence (Z87.891)
- tobacco dependence (F17.-)
- tobacco use (Z72.0)
Code Also
OfficialNo Code Also instructions are included in this display for C00. Check the code and parent instructions in the Code Book.
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
- Code
- C00
- Description
- Malignant neoplasm of lip
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF reference coefficient
- —
- Billable
- No
- Payment year
- 2026
Coder workflow notes
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What This Code Means
C00 is the ICD-10-CM diagnosis code for malignant neoplasm of lip. C00 sits in the ICD-10-CM chapter for neoplasms (c00-d49), within the section covering malignant neoplasms of lip, oral cavity and pharynx (c00-c14).
Header codes like C00 cannot be reported on claims directly; they organize child codes that share clinical context. Coders should select the billable child code that matches the documented presentation and then verify its current source-backed HCC mapping. Do not infer a child code or risk adjustment value from the header alone.
HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for C00 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.