ICD-10 H18.6
Non-Billable HeaderKeratoconus
About ICD-10-CM H18.6
ICD-10-CM code H18.6 represents Keratoconus. This is a non-billable header code in the Eye and Adnexa chapter (block H18). The 2026 edition of ICD-10-CM H18.6 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.
Medicare LCD Coverage for H18.6
Local Coverage Determinations (LCDs) from CMS MACs that list H18.6 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 H18.6.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but H18.6 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with H18.6
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 H18.6
Other codes in section H15-H22 (Disorders of sclera, cornea, iris and ciliary body).
ICD-10 H18.6, Billing FAQ
Is ICD-10 code H18.6 billable? +
No, H18.6 is a non-billable header code. Use a more specific child code from block H18 when submitting claims.
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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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