ICD-11 MMS 2026-01
Primary open-angle glaucoma
Description
Primary open-angle glaucoma is a chronic progressive optic neuropathy with characteristic morphological changes at the optic nerve head and retinal nerve fibre layer in the absence of other ocular disease or congenital anomalies. Progressive retinal ganglion cell death and visual field loss are associated with these changes. Anterior chamber angle appearance is normal and major risk factors include level of intraocular pressure and older age.
Exclusions from above levels
KA41 – Traumatic glaucoma due to birth injury01 – Certain infectious or parasitic diseases05 – Endocrine, nutritional or metabolic diseases
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18 – Complications of pregnancy, childbirth and the puerperium19 – Certain conditions originating in the perinatal period22 – Injury, poisoning or certain other consequences of external causes8A21.0 – Posterior cortical atrophy
Child codes
9C61.00 – Normal tension glaucoma9C61.01 – Ocular hypertension9C61.02 – High pressure primary open-angle glaucoma9C61.0Y – Other specified primary open-angle glaucoma9C61.0Z – Primary open-angle glaucoma, unspecified
Sibling codes
9C61.1 – Primary angle closure or angle closure glaucoma9C61.2 – Secondary open-angle glaucoma9C61.3 – Secondary angle closure glaucoma9C61.4 – Developmental glaucoma9C61.Y – Other specified glaucoma9C61.Z – Glaucoma, unspecified
Allowed postcoordination axes
Part of: 9C61: Glaucoma › 09: Diseases of the visual system
