ICD-10 Code H40.019 – Open angle with borderline findings, low risk, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H40.019 – Open angle with borderline findings, low risk, unspecified eye
What it is
This code describes glaucoma-suspect findings in an eye with open angles and a low estimated risk of progression. It is used when the eye is not yet diagnosed with definite glaucoma.
Clinical signs
Findings may include suspicious optic nerve or visual field changes, but not enough evidence for confirmed glaucoma. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record documents borderline glaucoma findings, open anterior chamber angles, and low risk in one unspecified eye. It also fits follow-up visits where the provider continues monitoring without confirming glaucoma.
If the note names a right or left eye, code that laterality instead. If documentation is unclear, check documentation before assigning H40.019.
Do not use for
Do not use it for confirmed open-angle glaucoma or for closed-angle, narrow-angle, or angle-closure disease. Do not use it when the chart identifies a specific eye laterality.
Coding tip
Match the code to both risk level and laterality; unspecified eye is appropriate only when the provider does not identify right or left.