ICD-10 Code H18.60 – Keratoconus, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.60 – Keratoconus, unspecified
What it is
Keratoconus, unspecified is a corneal disorder where the normally round cornea thins and bulges into a cone shape. Use this code when documentation confirms keratoconus but does not specify the affected eye or other details.
Clinical signs
Typical findings include progressive irregular astigmatism, blurred or distorted vision, and increasing glare or ghosting. Clinical features vary; refer to documentation.
When to use this code
Use H18.60 when the provider documents keratoconus without laterality or subtype. It also fits when the note confirms corneal ectasia consistent with keratoconus but does not give enough detail for a more specific code. Check documentation if another corneal condition is mentioned.
Do not use for
Do not use this code for corneal thinning or ectasia that is not documented as keratoconus. Do not assign it when a more specific keratoconus code is supported by the record.
Coding tip
If the chart lacks eye laterality or subtype, code the unspecified option only and query for clarification when appropriate.