Back to ICD-10 library
ICD-10-CM · FY 2026 APRIL UPDATE

H40.1

Open-angle glaucoma

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODEDESCRIPTIONTYPE
H40.10Unspecified open-angle glaucomaCategory
H40.10X0Unspecified open-angle glaucoma, stage unspecifiedBillable
H40.10X1Unspecified open-angle glaucoma, mild stageBillable
H40.10X2Unspecified open-angle glaucoma, moderate stageBillable
H40.10X3Unspecified open-angle glaucoma, severe stageBillable
H40.10X4Unspecified open-angle glaucoma, indeterminate stageBillable
H40.11Primary open-angle glaucomaCategory
H40.111Primary open-angle glaucoma, right eyeCategory
H40.1110Primary open-angle glaucoma, right eye, stage unspecifiedBillable
H40.1111Primary open-angle glaucoma, right eye, mild stageBillable
H40.1112Primary open-angle glaucoma, right eye, moderate stageBillable
H40.1113Primary open-angle glaucoma, right eye, severe stageBillable
H40.1114Primary open-angle glaucoma, right eye, indeterminate stageBillable
H40.112Primary open-angle glaucoma, left eyeCategory
H40.1120Primary open-angle glaucoma, left eye, stage unspecifiedBillable
H40.1121Primary open-angle glaucoma, left eye, mild stageBillable
H40.1122Primary open-angle glaucoma, left eye, moderate stageBillable
H40.1123Primary open-angle glaucoma, left eye, severe stageBillable
H40.1124Primary open-angle glaucoma, left eye, indeterminate stageBillable
H40.113Primary open-angle glaucoma, bilateralCategory
H40.1130Primary open-angle glaucoma, bilateral, stage unspecifiedBillable
H40.1131Primary open-angle glaucoma, bilateral, mild stageBillable
H40.1132Primary open-angle glaucoma, bilateral, moderate stageBillable
H40.1133Primary open-angle glaucoma, bilateral, severe stageBillable
H40.1134Primary open-angle glaucoma, bilateral, indeterminate stageBillable
H40.119Primary open-angle glaucoma, unspecified eyeCategory
H40.1190Primary open-angle glaucoma, unspecified eye, stage unspecifiedBillable
H40.1191Primary open-angle glaucoma, unspecified eye, mild stageBillable
H40.1192Primary open-angle glaucoma, unspecified eye, moderate stageBillable
H40.1193Primary open-angle glaucoma, unspecified eye, severe stageBillable

Use the complete reference

This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

Open official CMS files

ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.