ICD-10 Code H40.012 – Open angle with borderline findings, low risk, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H40.012 – Open angle with borderline findings, low risk, left eye
What it is
This code identifies borderline open-angle glaucoma findings in the left eye with low risk of progression. It is used when the optic nerve or other glaucoma-related findings are present, but the diagnosis is not established as definite glaucoma.
Clinical signs
Findings may include suspicious optic nerve cupping, abnormal optic disc appearance, or borderline visual field changes. Clinical features vary; refer to documentation.
When to use this code
Use H40.012 when the provider documents open-angle borderline findings limited to the left eye and specifies low risk. Apply it for surveillance visits, ophthalmology assessments, or follow-up after a glaucoma-suspect evaluation when no definite glaucoma diagnosis is recorded.
Do not use for
Do not use this code for confirmed open-angle glaucoma or for unspecified-eye findings. If the record does not clearly state low risk or left eye, check documentation.
Coding tip
Verify that the note distinguishes borderline findings from confirmed glaucoma and identifies the left eye before assigning H40.012.