ICD-10 Code H52.2 – Astigmatism (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H52.2 – Astigmatism
What it is
Astigmatism is a refractive error caused by an irregularly shaped cornea or lens. It makes light focus unevenly, which can blur vision at near and far distances.
Clinical signs
Common findings include blurred or distorted vision, eyestrain, squinting, and headaches. Clinical features vary; refer to documentation.
When to use this code
Use H52.2 when the provider documents astigmatism as the diagnosed refractive error. It is appropriate for routine eye examinations, vision complaints, or follow-up visits where astigmatism is the reason for assessment. Code only when the record clearly supports the diagnosis.
Do not use for
Do not use this code for myopia, hyperopia, or presbyopia unless astigmatism is also documented. Check documentation if the record only states blurred vision without a confirmed refractive diagnosis.
Coding tip
Confirm whether the astigmatism is documented as the primary refractive diagnosis before assigning H52.2.