ICD-10 Code H18.613 – Keratoconus, stable, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.613 – Keratoconus, stable, bilateral
What it is
This code identifies keratoconus affecting both eyes when the corneal thinning and cone-shaped distortion are stable. Use it for a documented bilateral condition without evidence of current progression.
Clinical signs
Typical findings include irregular astigmatism, progressive corneal thinning, and reduced visual quality from corneal shape changes. Clinical features vary; refer to documentation for stability and bilateral involvement.
When to use this code
Use H18.613 when the record states bilateral keratoconus and notes that the condition is stable, unchanged, or not actively progressing. It also fits follow-up visits where the diagnosis is confirmed but no worsening is documented. Check documentation if laterality or stability is unclear.
Do not use for
Do not use this code for unilateral keratoconus, unspecified laterality, or cases described as progressive or worsening. If the chart does not clearly support bilateral stable disease, check documentation.
Coding tip
Confirm both laterality and stability in the ophthalmology note before assigning H18.613.