ICD-10-CM diagnosis code
H40.20X2 Unspecified primary angle-closure glaucoma, moderate stage
- Billable
- Yes, a complete code (FY2026)
- Category
- H40 Glaucoma
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Other codes in H40
252 complete codes in this category.
- H40.151Residual stage of open-angle glaucoma, right eye
- H40.152Residual stage of open-angle glaucoma, left eye
- H40.153Residual stage of open-angle glaucoma, bilateral
- H40.159Residual stage of open-angle glaucoma, unspecified eye
- H40.20X0Unspecified primary angle-closure glaucoma, stage unspecified
- H40.20X1Unspecified primary angle-closure glaucoma, mild stage
- H40.20X2Unspecified primary angle-closure glaucoma, moderate stage
- H40.20X3Unspecified primary angle-closure glaucoma, severe stage
- H40.20X4Unspecified primary angle-closure glaucoma, indeterminate stage
- H40.211Acute angle-closure glaucoma, right eye
- H40.212Acute angle-closure glaucoma, left eye
- H40.213Acute angle-closure glaucoma, bilateral
Documentation tips
- Make sure the note supports every element of the title, “Unspecified primary angle-closure glaucoma, moderate stage”: each detail in it should be traceable to the history, examination or assessment.
- Code to the highest specificity the documentation supports. If a detail is missing from the note, add it to the note rather than choosing a less specific code by default.
- Check the Tabular List and official guidelines for instructional notes (“code first”, “use additional code”, Excludes1/Excludes2) that apply to H40.
The international WHO ICD-10 also has H40, with its inclusion and exclusion notes; titles and detail can differ from ICD-10-CM.
ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
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