ICD-10 Code H52.203 – Unspecified astigmatism, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H52.203 – Unspecified astigmatism, bilateral
What it is
H52.203 identifies astigmatism in both eyes when the type is not specified. It means the cornea or lens has an irregular curvature that causes blurred or distorted vision.
Clinical signs
Patients may report blurred vision, eye strain, headaches, or difficulty seeing clearly at near or distance. Clinical features vary; refer to documentation, refraction findings, or eye examination notes.
When to use this code
Use this code when the record documents bilateral astigmatism but does not specify regular, irregular, or another subtype. It is also appropriate when the provider confirms astigmatism in both eyes and no further detail is available.
Choose this code for diagnosis coding, not for routine refractive screening unless the clinician documents the condition. If laterality or type is clarified, code the more specific documented diagnosis.
Do not use for
Do not use it when the chart specifies a different astigmatism type or a unilateral diagnosis. Check documentation if the provider records only blurred vision without confirming astigmatism.
Coding tip
Verify both laterality and specificity in the ophthalmology note before assigning H52.203.