ICD-10 Code H44.41 – Flat anterior chamber hypotony of eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H44.41 – Flat anterior chamber hypotony of eye
What it is
This code identifies a flat or nearly flat anterior chamber caused by ocular hypotony. Use it when the chart documents low intraocular pressure with collapse of the front chamber of the eye.
Clinical signs
Findings may include a shallow or collapsed anterior chamber, reduced intraocular pressure, and related postoperative or traumatic eye changes. Clinical features vary; refer to documentation.
When to use this code
Use H44.41 when the provider clearly documents flat anterior chamber hypotony as the diagnosis. It may appear after eye surgery, trauma, or other causes of ocular hypotony, but you should code only what is documented.
If the note mentions a shallow chamber without hypotony, or hypotony without a flat chamber, check documentation before assigning this code. Code the specific documented condition rather than assuming the mechanism.
Do not use for
Do not use this code for routine postoperative eye pain, generic shallow anterior chamber, or unspecified glaucoma-related findings. Check documentation if the record does not clearly link the flat chamber to hypotony.
Coding tip
Look for both elements in the record: flat anterior chamber and hypotony; if one is missing, verify the diagnosis before coding.