H40.21
H40.21: Acute angle-closure glaucoma
Non-billable headerICD-10-CM
H40.21 is a non-billable header ICD-10-CM code for acute angle-closure glaucoma. It cannot be billed on its own: choose one of the more specific child codes below.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Acute angle-closure glaucoma attack
- Acute angle-closure glaucoma crisis
Excludes1 inherited from the categories above H40.21
A category’s note binds every code beneath it.
Written on H40.2: Primary angle-closure glaucoma
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Code history
Unchanged in every release from FY2024 to FY2027.
Code to one of these instead H40.21
4 child codes. Green means billable.