C03
⚠ Non-billable
Malignant neoplasm of gum
ICD-10-CM · FY2026 · Neoplasms
Code
C03
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.
Includes
- malignant neoplasm of alveolar (ridge) mucosa
- malignant neoplasm of gingiva
Excludes2 — not included here, but may code together
- malignant odontogenic neoplasms (C41.0-C41.1)
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 C03?
ICD-10-CM code C03 represents Malignant neoplasm of gum. It is a non-billable header code requiring a more specific subcategory in the Neoplasms chapter, effective October 1, 2025 – September 30, 2026.
Is C03 billable?
No. C03 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is C03 in?
C03 belongs to the Neoplasms chapter (C00–D49) of ICD-10-CM.
Related codes in the C03 category
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