ICD-10 C88.9
Non-Billable HeaderMalignant immunoproliferative disease, unspecified
About ICD-10-CM C88.9
ICD-10-CM code C88.9 represents Malignant immunoproliferative disease, unspecified. This is a non-billable header code in the chapter (block C88). The 2026 edition of ICD-10-CM C88.9 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.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under C88.9. Per CMS ICD-10-CM Tabular 2026.
- Immunoproliferative disease NOS
Medicare LCD Coverage for C88.9
Local Coverage Determinations (LCDs) from CMS MACs that list C88.9 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 C88.9.
2 Cigna
CPT Codes Commonly Billed with C88.9
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.
Convert C88.9 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| C88.9 | 20380 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To C88.9
Other codes in section C81-C96 (Malignant neoplasms of lymphoid, hematopoietic and related tissue).
ICD-10 C88.9, Billing FAQ
Is ICD-10 code C88.9 billable? +
No, C88.9 is a non-billable header code. Use a more specific child code from block C88 when submitting claims.
What other names or terms map to C88.9? +
ICD-10 C88.9 includes: Immunoproliferative disease NOS.
What ICD-9 codes does C88.9 map to? +
Per CMS GEMs, C88.9 maps to ICD-9 codes: 20380. Useful for legacy data review and historical claim analysis.
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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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