ICD-10 H10.409
Billable / SpecificUnspecified chronic conjunctivitis, unspecified eye
About ICD-10-CM H10.409
ICD-10-CM code H10.409 represents Unspecified chronic conjunctivitis, unspecified eye. This is a billable/specific code in the Eye and Adnexa chapter (block H10). The 2026 edition of ICD-10-CM H10.409 became effective on October 1, 2025.
Medicare LCD Coverage for H10.409
Local Coverage Determinations (LCDs) from CMS MACs that list H10.409 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 H10.409.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but H10.409 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with H10.409
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 H10.409 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 |
|---|---|---|
| H10.409 | 37210 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To H10.409
Other codes in section H10-H11 (Disorders of conjunctiva).
ICD-10 H10.409, Billing FAQ
Is ICD-10 code H10.409 billable? +
Yes, H10.409 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What ICD-9 codes does H10.409 map to? +
Per CMS GEMs, H10.409 maps to ICD-9 codes: 37210. 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 May 31, 2026.
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