ICD-10 Code H52.212 – Irregular astigmatism, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H52.212 – Irregular astigmatism, left eye
What it is
H52.212 identifies irregular astigmatism affecting the left eye. The cornea or lens has uneven curvature that causes distorted vision not fully corrected by standard glasses.
Clinical signs
Patients may report blurred or distorted vision, ghosting, glare, or reduced best-corrected acuity. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents irregular astigmatism specifically in the left eye. It may appear on ophthalmology exams, refraction assessments, or problem lists when the left eye is clearly identified. If the note only says astigmatism without laterality, check documentation.
Do not use for
Do not use H52.212 for regular astigmatism, unspecified astigmatism, or bilateral findings unless the record supports left-eye involvement. If another corneal disorder is the primary diagnosis, check documentation.
Coding tip
Verify laterality in the ophthalmology note before assigning H52.212.