ICD-10 Code H52.221 – Regular astigmatism, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H52.221 – Regular astigmatism, right eye
What it is
Regular astigmatism in the right eye is a refractive error caused by an uneven corneal or lenticular curvature. It makes light focus at different points, leading to blurred or distorted vision in that eye.
Clinical signs
Patients may report blurred vision, ghosting, or eye strain, especially when reading or viewing distant objects. Clinical features vary; refer to documentation.
When to use this code
Use this code when documentation specifically identifies regular astigmatism affecting the right eye. It is appropriate for routine eye exams, refraction findings, or problem lists that clearly name the right eye as the affected side.
Code it only when the provider documents the condition as a diagnosis, not just a suspected refractive issue. If laterality is not stated, check documentation before assigning a unilateral code.
Do not use for
Do not use this code for unspecified astigmatism, left-eye astigmatism, or bilateral astigmatism. Do not use it when the record only mentions blurred vision without a documented refractive diagnosis.
Coding tip
Confirm laterality in the note, because H52.221 applies only to the right eye.