ICD-10 Code H18.612 – Keratoconus, stable, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H18.612 – Keratoconus, stable, left eye
What it is
H18.612 identifies keratoconus affecting the left eye that is documented as stable. It indicates a corneal thinning and bulging disorder without current progression.
Clinical signs
Findings may include irregular astigmatism, corneal thinning, and distorted vision in the left eye. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents keratoconus in the left eye and states it is stable, unchanged, or not progressing. It fits follow-up visits, routine monitoring, or problem-list documentation when no active worsening is described.
Code the left-eye specificity only when the record clearly identifies that eye. If stability is not documented, or if progression is noted, Check documentation.
Do not use for
Do not use H18.612 for keratoconus of the right eye, both eyes, or unspecified eye. Do not use it when the condition is described as progressive or when the diagnosis is not confirmed.
Coding tip
Confirm both laterality and stability in the provider note before assigning H18.612.