H40.1531 Residual stage of open-angle glaucoma, bilateral, mild stage

ICD-10-CM Code H40.1531: Residual Stage of Open-Angle Glaucoma, Bilateral, Mild Stage

ICD-10-CM code H40.1531 identifies the residual stage of open-angle glaucoma, bilateral, mild stage. Open-angle glaucoma is a disease type where patients are frequently asymptomatic. This code appears in official diagnosis lists and Medicare billing articles for ophthalmic diagnostic imaging. 1 3 4

Plain-language overview

Open-angle glaucoma is one of the two main types of glaucoma disease, and patients with this condition are frequently asymptomatic, meaning they may be unaware they have it. 1

What this code represents

Code H40.1531 explicitly appears within an official state Medicaid list of ICD-10 diagnosis codes, confirming its inclusion in recognized diagnostic coding sets. 3

Coding details

A Medicare billing article for scanning computerized ophthalmic diagnostic imaging includes H40.1531, placing this specific glaucoma diagnosis within an operational coverage and coding context. 4

The same Medicare article lists neighboring codes like unspecified open-angle glaucoma and residual stage of open-angle glaucoma right eye, showing how H40.1531 fits into a broader diagnostic family. 4

Clinical context

Open-angle glaucoma may arise from any degree of ocular nerve injury, and clinical staging systems attempt to categorize patients from early mild visual field abnormalities to terminal illness. 1

Clinicians must differentiate open-angle glaucoma from angle-closure glaucoma and causes of nonglaucomatous optic neuropathy, such as ischemic, compressive, and hereditary optic neuropathies. 2

Documentation considerations

The state Medicaid and Medicare sources list H40.1531 among diagnostic codes, but neither excerpt specifies the particular clinical or chart documentation elements needed to support this exact diagnosis. 3 4

What the sources add

While clinical reviews describe open-angle glaucoma pathogenesis and asymptomatic presentations, the Medicaid and Medicare sources operationally situate H40.1531 within official diagnosis lists and billing articles. 1 3 4

Sources

1. Glaucoma in Adults-diagnosis, Management, and Prediagnosis to End-stage, Categorizing Glaucoma's Stages: A Review — pmc.ncbi.nlm.nih.gov; accessed 2026-07-27.
2. Bookshelf — ncbi.nlm.nih.gov; accessed 2026-07-27.
3. Diagnosis Code — medicaid.ncdhhs.gov; accessed 2026-07-27.
4. Article - Billing and Coding: Scanning Computerized Ophthalmic Diagnostic Imaging (SCODI) (A56825) — cms.gov; accessed 2026-07-27.