Residual stage of angle-closure glaucoma, bilateral

This code signifies the permanent, non-progressive damage to the optic nerve and visual field loss resulting from a past episode of angle-closure glaucoma, affecting both eyes. It indicates that the acute phase of the disease has resolved, but the residual effects remain. This stage typically involves stable intraocular pressure (IOP) but persistent glaucomatous optic neuropathy.

Use this code when documentation clearly states "residual stage" or "sequelae" of angle-closure glaucoma in both eyes, following a resolved acute or chronic phase. This is appropriate for patients with established optic nerve damage and visual field defects attributed to prior angle closure, even if current IOP is controlled. Supporting documentation should include ophthalmological exam findings confirming bilateral optic nerve damage and visual field loss consistent with glaucoma.

• Do not use this code for active angle-closure glaucoma; instead, use codes from H40.20-H40.23.
• Ensure documentation specifies "bilateral" involvement; otherwise, use the appropriate unilateral residual stage code.
• This code should be sequenced as a primary diagnosis when the residual stage is the focus of the encounter, or as a secondary diagnosis when managing other conditions in a patient with this history.