ICD-10-CM 2027
ICD-10 code for astigmatism
From the official ICD-10-CM alphabetic index entry “Astigmatism (compound) (congenital)”. Page updated September 29, 2026.
About coding astigmatism
The ICD-10-CM code for astigmatism is H52.20 (Unspecified astigmatism). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on H52.20.
Within H52.2, choose H52.20 (Unspecified astigmatism) only when documentation doesn't support a more specific option: irregular astigmatism (H52.21) and regular astigmatism (H52.22).
To report this condition, pick the subcode that matches the documentation: H52.201 (right eye), H52.202 (left eye), H52.203 (bilateral) and H52.209 (unspecified eye).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
More specific astigmatism codes (official index)
Common questions about astigmatism ICD-10 codes
What is the ICD-10 code for astigmatism?
- H52.20 — Unspecified astigmatism (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: H52.21, H52.22.
What is the ICD-10 code for irregular astigmatism?
- H52.21 — Irregular astigmatism (header code; choose a more specific subcode).
What is the ICD-10 code for regular astigmatism?
- H52.22 — Regular astigmatism (header code; choose a more specific subcode).
Is H52.20 billable?
- No. H52.20 is a header code. Report one of its more specific subcodes instead.