ICD-10 Code H44.412 – Flat anterior chamber hypotony of left eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H44.412 – Flat anterior chamber hypotony of left eye
What it is
This code identifies a left eye with an abnormally shallow or flat anterior chamber due to hypotony, meaning low intraocular pressure. It describes an eye anatomy problem, not a separate cause.
Clinical signs
You may see a flattened anterior chamber on exam, often with signs of low intraocular pressure. Clinical features vary; refer to documentation.
When to use this code
Use this code when documentation clearly states flat anterior chamber hypotony in the left eye. It fits postoperative or injury-related notes when the provider identifies the condition and laterality. If the record only mentions hypotony or shallow chamber without the flat anterior chamber detail, check documentation.
Do not use for
Do not use it for hypotony in the right eye, bilateral findings, or unspecified eye. Do not assign it when the note describes low pressure without a flat anterior chamber diagnosis.
Coding tip
Confirm laterality and the exact wording “flat anterior chamber hypotony” before coding.