ICD-10 J33.8
Billable / SpecificOther polyp of sinus
About ICD-10-CM J33.8
ICD-10-CM code J33.8 represents Other polyp of sinus. This is a billable/specific code in the Respiratory System chapter (block J33). The 2026 edition of ICD-10-CM J33.8 became effective on October 1, 2025.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under J33.8. Per CMS ICD-10-CM Tabular 2026.
- Accessory polyp of sinus
- Ethmoidal polyp of sinus
- Maxillary polyp of sinus
- Sphenoidal polyp of sinus
Medicare LCD Coverage for J33.8
Local Coverage Determinations (LCDs) from CMS MACs that list J33.8 as a covered diagnosis.
Showing top 10 of 153 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing J33.8.
1 Cigna
5 Medicare
CPT Codes Commonly Billed with J33.8
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 J33.8 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 |
|---|---|---|
| J33.8 | 4718 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To J33.8
Other codes in section J30-J39 (Other diseases of upper respiratory tract).
ICD-10 J33.8, Billing FAQ
Is ICD-10 code J33.8 billable? +
Yes, J33.8 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What other names or terms map to J33.8? +
ICD-10 J33.8 includes: Accessory polyp of sinus; Ethmoidal polyp of sinus; Maxillary polyp of sinus, and 1 more clinical synonyms.
What ICD-9 codes does J33.8 map to? +
Per CMS GEMs, J33.8 maps to ICD-9 codes: 4718. 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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