ICD-10-CM Diagnosis Code (2025)
Official Description for H40.21
Acute angle-closure glaucoma
Coding Notes & Guidelines for H40.21
Inclusion Terms
- Acute angle-closure glaucoma attack
- Acute angle-closure glaucoma crisis
Parent Code (Less Specific):
About ICD-10-CM Code H40.21 (Acute angle-closure glaucoma)
ICD-10-CM code H40.21 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM H40.21 became effective on October 1, 2024.
This page provides detailed information about H40.21 - Acute angle-closure glaucoma. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Acute angle-closure glaucoma.