Free Medical Coding > ICD10 CM > 2024 ICD-10-CM Codes > 2024 ICD-10-CM Codes H00-H59 – Diseases of the eye and adnexa (H00-H59) > 2024 ICD-10-CM Codes H40-H42 – Glaucoma (H40-H42) > 2024 ICD-10-CM Codes H40 – Glaucoma > 2024 ICD-10-CM Codes H40.2 – Primary angle-closure glaucoma (H40.2) > 2024 ICD-10-CM Codes H40.21 – Acute angle-closure glaucoma (H40.21)