ICD-10 Code H52.22 – Regular astigmatism (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H52.22 – Regular astigmatism
What it is
Regular astigmatism is a refractive error caused by an evenly shaped cornea or lens that still focuses light unevenly. You use this code when the condition is documented as regular astigmatism.
Clinical signs
Patients commonly report blurred or distorted vision at distance or near, often with eye strain or headaches. Clinical features vary; refer to documentation.
When to use this code
Use H52.22 when the provider documents regular astigmatism as the diagnosis, such as during an eye exam or refractive assessment. It may be appropriate when the record identifies astigmatism without specifying another refractive disorder. Check documentation if the note only says “blurred vision” or “refractive error.”
Do not use for
Do not use this code for other refractive errors, such as myopia, hyperopia, or presbyopia. Do not assign it when the chart does not clearly document regular astigmatism.
Coding tip
Code from the provider’s exact diagnosis wording and avoid assuming astigmatism from vision complaints alone.