ICD-10 Code H40.111 – Primary open-angle glaucoma, right eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H40.111 – Primary open-angle glaucoma, right eye
What it is
This code identifies primary open-angle glaucoma affecting the right eye. It is a chronic optic neuropathy where the drainage angle is open, but optic nerve damage and visual field loss can occur.
Clinical signs
Findings may include increased optic nerve cupping, corresponding visual field defects, and progressive loss of peripheral vision. Clinical features vary; refer to documentation.
When to use this code
Use H40.111 when the provider documents primary open-angle glaucoma in the right eye only. It applies when the diagnosis is established and laterality is specified in the record. If the note does not clearly identify the right eye, check documentation before coding.
Do not use for
Do not use this code for glaucoma in the left eye, bilateral glaucoma, or unspecified eye. It is also not appropriate for other glaucoma types, such as angle-closure or secondary glaucoma.
Coding tip
Always verify laterality in the assessment or problem list before assigning H40.111.