ICD-10 C11
Non-Billable HeaderMalignant neoplasm of nasopharynx
About ICD-10-CM C11
ICD-10-CM code C11 represents Malignant neoplasm of nasopharynx. This is a non-billable header code in the Neoplasms chapter (block C11). The 2026 edition of ICD-10-CM C11 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.
Use Additional Code
When coding C11, also report these additional codes when applicable.
- code to identify:
- exposure to environmental tobacco smoke (Z77.22)
- exposure to tobacco smoke in the perinatal period (P96.81)
- history of tobacco dependence (Z87.891)
- occupational exposure to environmental tobacco smoke (Z57.31)
- tobacco dependence (F17.-)
- tobacco use (Z72.0)
Medicare LCD Coverage for C11
Local Coverage Determinations (LCDs) from CMS MACs that list C11 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 C11.
3 Cigna
CPT Codes Commonly Billed with C11
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 C11
Other codes in section C00-C14 (Malignant neoplasms of lip, oral cavity and pharynx).
ICD-10 C11, Billing FAQ
Is ICD-10 code C11 billable? +
No, C11 is a non-billable header code. Use a more specific child code from block C11 when submitting claims.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on June 1, 2026.
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