ICD-10 Code H40.242 – Residual stage of angle-closure glaucoma, left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H40.242 – Residual stage of angle-closure glaucoma, left eye
What it is
This code identifies residual-stage angle-closure glaucoma affecting the left eye. It means the acute or active phase has passed, but the eye still shows lasting glaucomatous damage or sequelae.
Clinical signs
Findings may include a documented history of angle closure with persistent optic nerve or visual field damage in the left eye. Clinical features vary; refer to documentation.
When to use this code
Use H40.242 when the provider documents residual stage of angle-closure glaucoma in the left eye. Code it for follow-up visits when the condition is no longer acute but remains clinically relevant. If the note only says glaucoma without laterality or stage, check documentation.
Do not use for
Do not use this code for acute angle-closure glaucoma, unspecified glaucoma, or glaucoma in the right eye or both eyes. Do not guess the stage if the record does not state residual disease.
Coding tip
Confirm both laterality and stage in the ophthalmology note before assigning H40.242.