H40.21

Acute angle-closure 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

CODE	DESCRIPTION	TYPE
H40.211	Acute angle-closure glaucoma, right eye	Billable
H40.212	Acute angle-closure glaucoma, left eye	Billable
H40.213	Acute angle-closure glaucoma, bilateral	Billable
H40.219	Acute angle-closure glaucoma, unspecified eye	Billable

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.