ICD-10 Code H18.61 – Keratoconus, stable (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.61 – Keratoconus, stable
What it is
H18.61 identifies keratoconus that is stable, meaning the corneal thinning and cone-shaped distortion are not currently progressing. Use it when the diagnosis is confirmed and the condition is being monitored rather than actively worsening.
Clinical signs
Typical findings include irregular astigmatism, blurred vision, and corneal thinning or protrusion on examination. Clinical features vary; refer to documentation for evidence that the keratoconus is stable.
When to use this code
Use this code when the provider documents keratoconus as stable, unchanged, or not progressing. It also fits follow-up visits for known keratoconus when the record shows no active deterioration. If stability is not stated, check documentation.
Do not use for
Do not use H18.61 for progressive or worsening keratoconus, or when the chart only notes suspected corneal ectasia. If the condition is unspecified, verify the provider’s wording before coding.
Coding tip
Code H18.61 only when stability is clearly documented; otherwise, query for clarification.