ICD-10 Code H18.619 – Keratoconus, stable, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.619 – Keratoconus, stable, unspecified eye
What it is
This code identifies keratoconus that is stable and affects an unspecified eye. It means the cornea has a cone-like shape, but the condition is not documented as progressing.
Clinical signs
Typical findings include corneal thinning, irregular astigmatism, and reduced visual acuity. Clinical features vary; refer to documentation.
When to use this code
Use H18.619 when the record clearly states keratoconus is stable and does not specify left or right eye. You may also use it when the clinician documents keratoconus without active worsening. If the eye is identified, code the laterality instead.
Do not use for
Do not use this code for progressive or unstable keratoconus. Do not use it when documentation identifies a specific eye and a laterality-specific code is available.
Coding tip
Check the ophthalmology note for stability and laterality before assigning H18.619.