ICD-10 Code H40.15 – Residual stage of open-angle glaucoma (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H40.15 – Residual stage of open-angle glaucoma
What it is
This code identifies the residual stage of open-angle glaucoma, when prior disease has left lasting optic nerve or visual field damage. Use it to describe the chronic aftereffects of glaucoma rather than an acute pressure event.
Clinical signs
Findings may include persistent optic disc cupping, documented visual field loss, and reduced peripheral vision. Clinical features vary; refer to documentation.
When to use this code
Use H40.15 when the provider documents residual or stable damage from open-angle glaucoma and does not describe an active, uncontrolled phase. It is appropriate for follow-up visits when the condition is established and the record supports a residual stage.
Code from the clinician’s wording, especially if the note distinguishes residual disease from chronic, primary, or unspecified glaucoma. Check documentation if the stage is unclear or if laterality is needed.
Do not use for
Do not use this code for acute glaucoma, narrow-angle glaucoma, or open-angle glaucoma without residual-stage documentation. Do not assume residual disease based only on a history of glaucoma.
Coding tip
Look for the exact term “residual stage” in the assessment before assigning H40.15.