C00
⚠ Non-billable
Malignant neoplasm of lip
ICD-10-CM · FY2026 · Neoplasms
Code
C00
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Neoplasms
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Official coding notes
From CMS's ICD-10-CM Tabular List.
Excludes1 — never code together
- malignant melanoma of lip (C43.0)
- Merkel cell carcinoma of lip (C4A.0)
- other and unspecified malignant neoplasm of skin of lip (C44.0-)
Use additional code
- code to identify:
- alcohol abuse and dependence (F10.-)
- history of tobacco dependence (Z87.891)
- tobacco dependence (F17.-)
- tobacco use (Z72.0)
Frequently asked questions
What is ICD-10 code C00?
ICD-10-CM code C00 represents Malignant neoplasm of lip. It is a non-billable header code requiring a more specific subcategory in the Neoplasms chapter, effective October 1, 2025 – September 30, 2026.
Is C00 billable?
No. C00 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is C00 in?
C00 belongs to the Neoplasms chapter (C00–D49) of ICD-10-CM.
Related codes in the C00 category
C00.0
Malignant neoplasm of external upper lip
Billable
C00.1
Malignant neoplasm of external lower lip
Billable
C00.2
Malignant neoplasm of external lip, unspecified
Billable
C00.3
Malignant neoplasm of upper lip, inner aspect
Billable
C00.4
Malignant neoplasm of lower lip, inner aspect
Billable
C00.5
Malignant neoplasm of lip, unspecified, inner aspect
Billable
C00.6
Malignant neoplasm of commissure of lip, unspecified
Billable
C00.8
Malignant neoplasm of overlapping sites of lip
Billable
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