Acute angle-closure glaucoma, left eye

This code signifies a sudden and severe increase in intraocular pressure (IOP) in the left eye, caused by the iris blocking the drainage angle. This acute blockage prevents aqueous humor from exiting the eye, leading to rapid vision loss and ocular pain. It is an ophthalmic emergency requiring immediate intervention.

Apply this code when documentation clearly indicates an acute onset of angle-closure glaucoma affecting the patient's left eye. This typically involves symptoms like sudden eye pain, blurred vision, halos around lights, and a red eye, confirmed by elevated IOP and a closed or occluded anterior chamber angle on examination.

• Ensure laterality is precisely documented (left eye). Do not use for bilateral or unspecified cases.
• Distinguish carefully from chronic angle-closure glaucoma or open-angle glaucoma, which have different code assignments.
• Look for terms like "acute attack," "sudden onset," or "crisis" in the clinical notes to support the "acute" designation.