Neovascular secondary angle closure glaucoma, right eye

This code describes a specific type of glaucoma affecting the right eye, where new, abnormal blood vessels (neovascularization) grow in the iris or angle of the eye, leading to a secondary closure of the drainage angle. This neovascularization obstructs the outflow of aqueous humor, causing increased intraocular pressure and optic nerve damage.

Use this code when documentation clearly indicates neovascular glaucoma affecting the right eye, where the angle closure is a secondary consequence of the abnormal vessel growth. This diagnosis is typically supported by ophthalmological examination findings such as gonioscopy showing neovascularization of the angle, elevated intraocular pressure, and optic nerve damage.

• Ensure documentation specifies "right eye" to support laterality.
• Distinguish from primary angle-closure glaucoma (H40.2x) where neovascularization is not the underlying cause.
• Look for associated conditions that can lead to neovascularization, such as diabetic retinopathy or retinal vein occlusion, and code them accordingly.