ICD-10 Code H44.413 – Flat anterior chamber hypotony of eye, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H44.413 – Flat anterior chamber hypotony of eye, bilateral
What it is
This code identifies a bilateral eye condition where the anterior chamber is abnormally shallow or flat because of low intraocular pressure. It indicates hypotony affecting both eyes.
Clinical signs
Typical findings include a shallow or flat anterior chamber on exam and signs of ocular hypotony. Clinical features vary; refer to documentation.
When to use this code
Use H44.413 when the provider documents flat anterior chamber hypotony in both eyes. It fits cases recorded as bilateral ocular hypotony with shallow anterior chambers, including postoperative or disease-related documentation when explicitly stated.
Do not use for
Do not use this code for unilateral eye involvement or for general hypotony without a flat anterior chamber. Check documentation if the record describes a different anterior chamber abnormality.
Coding tip
Confirm that both laterality and the flat anterior chamber finding are documented before assigning H44.413.