ICD-10 C84
Non-Billable HeaderMature T/NK-cell lymphomas
About ICD-10-CM C84
ICD-10-CM code C84 represents Mature T/NK-cell lymphomas. This is a non-billable header code in the chapter (block C84). The 2026 edition of ICD-10-CM C84 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 1 Excludes
Pure excludes, these codes can never be coded together with C84. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- personal history of non-Hodgkin lymphoma (Z85.72)
Medicare LCD Coverage for C84
Local Coverage Determinations (LCDs) from CMS MACs that list C84 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 C84.
1 Cigna
CPT Codes Commonly Billed with C84
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 C84
Other codes in section C81-C96 (Malignant neoplasms of lymphoid, hematopoietic and related tissue).
ICD-10 C84, Billing FAQ
Is ICD-10 code C84 billable? +
No, C84 is a non-billable header code. Use a more specific child code from block C84 when submitting claims.
What codes are Type 1 Excludes for C84? +
Type 1 Excludes (never code together with C84): personal history of non-Hodgkin lymphoma (Z85.72)
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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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