ICD-10 Code H40.113 – Primary open-angle glaucoma, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H40.113 – Primary open-angle glaucoma, bilateral
What it is
H40.113 identifies primary open-angle glaucoma affecting both eyes. This is a chronic optic nerve disease with open anterior chamber angles and progressive risk of vision loss.
Clinical signs
Findings may include optic nerve cupping, visual field loss, and elevated or normal intraocular pressure. Clinical features vary; refer to documentation.
When to use this code
Use H40.113 when the provider documents primary open-angle glaucoma in both eyes. It fits established bilateral disease, including cases described as controlled or stable if the diagnosis remains active.
Code it when laterality is clearly bilateral and no more specific subtype is documented. Check documentation if the record only notes glaucoma without specifying open-angle or both eyes.
Do not use for
Do not use this code for angle-closure, secondary, or unspecified glaucoma. Do not assign it when the record does not confirm bilateral involvement.
Coding tip
Confirm both the glaucoma type and laterality in the note before assigning H40.113.