ICD-10 Code H52.209 – Unspecified astigmatism, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H52.209 – Unspecified astigmatism, unspecified eye
What it is
H52.209 identifies astigmatism when the eye is not specified and the record does not state the type or laterality. It means the cornea or lens bends light unevenly, causing blurred or distorted vision.
Clinical signs
Common findings include blurred distance or near vision, eye strain, headaches, or difficulty seeing sharp edges. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents astigmatism but does not identify right, left, or bilateral eye involvement. It is also appropriate when the note says “unspecified astigmatism” without further detail. If the record later clarifies laterality or type, code to the more specific option.
Do not use for
Do not use it when the chart specifies astigmatism in a particular eye or a different refractive error. Check documentation if the diagnosis is mixed with myopia, hyperopia, or another defined visual disorder.
Coding tip
Confirm that “unspecified” is truly documented before assigning H52.209.