Flat anterior chamber hypotony of left eye

This code describes a condition of abnormally low intraocular pressure (hypotony) in the left eye, specifically due to a flattened anterior chamber. This often indicates a disruption in aqueous humor production or drainage, leading to reduced volume in the front part of the eye. It can result in vision impairment and other ocular complications.

Use this code when documentation explicitly states hypotony of the left eye with an associated flat anterior chamber. This typically occurs post-surgically (e.g., after glaucoma surgery or cataract extraction) or following trauma. Supporting documentation should include ophthalmological exam findings noting low intraocular pressure and a shallow or flat anterior chamber.

• Ensure laterality is clearly documented as "left eye" to support this specific code.
• Distinguish from hypotony without a flat anterior chamber, which would be coded differently.
• Always look for an underlying cause (e.g., surgical complication, trauma) and code it as a primary diagnosis if applicable, with this code as a secondary.