ICD-10 C03
Non-Billable HeaderMalignant neoplasm of gum
About ICD-10-CM C03
ICD-10-CM code C03 represents Malignant neoplasm of gum. This is a non-billable header code in the Neoplasms chapter (block C03). The 2026 edition of ICD-10-CM C03 became effective on October 1, 2025. Non-billable codes cannot be used as a primary or secondary diagnosis on a claim, use a more specific child code instead.
Type 2 Excludes
Not included here, the excluded code is not part of C03, but a patient may have both conditions at the same time. Both codes may be coded together when applicable.
- malignant odontogenic neoplasms (C41.0-C41.1)
Includes
- malignant neoplasm of alveolar (ridge) mucosa
- malignant neoplasm of gingiva
Use Additional Code
When coding C03, also report these additional codes when applicable.
- code to identify:
- alcohol abuse and dependence (F10.-)
- history of tobacco dependence (Z87.891)
- tobacco dependence (F17.-)
- tobacco use (Z72.0)
Medicare LCD Coverage for C03
Local Coverage Determinations (LCDs) from CMS MACs that list C03 as a covered diagnosis.
This doesn't mean the code isn't covered, it means no MAC has issued a Local Coverage Determination naming this specific code. Coverage may still apply under National Coverage Determinations or general medical-necessity rules.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing C03.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but C03 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with C03
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Codes Adjacent To C03
Other codes in section C00-C14 (Malignant neoplasms of lip, oral cavity and pharynx).
ICD-10 C03, Billing FAQ
Is ICD-10 code C03 billable? +
No, C03 is a non-billable header code. Use a more specific child code from block C03 when submitting claims.
What codes are Type 2 Excludes for C03? +
Type 2 Excludes (may be coded together when both conditions exist): malignant odontogenic neoplasms (C41.0-C41.1)
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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