ICD-10 H21.1X1
Billable / SpecificOther vascular disorders of iris and ciliary body, right eye
About ICD-10-CM H21.1X1
ICD-10-CM code H21.1X1 represents Other vascular disorders of iris and ciliary body, right eye. This is a billable/specific code in the Eye and Adnexa chapter (block H21). The 2026 edition of ICD-10-CM H21.1X1 became effective on October 1, 2025.
Medicare LCD Coverage for H21.1X1
Local Coverage Determinations (LCDs) from CMS MACs that list H21.1X1 as a covered diagnosis.
Showing top 10 of 37 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing H21.1X1.
5 Medicare
CPT Codes Commonly Billed with H21.1X1
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 H21.1X1 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 |
|---|---|---|
| H21.1X1 | 36442 | 10000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To H21.1X1
Other codes in section H15-H22 (Disorders of sclera, cornea, iris and ciliary body).
ICD-10 H21.1X1, Billing FAQ
Is ICD-10 code H21.1X1 billable? +
Yes, H21.1X1 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What ICD-9 codes does H21.1X1 map to? +
Per CMS GEMs, H21.1X1 maps to ICD-9 codes: 36442. 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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