ICD-10 Code H44.439 – Hypotony of eye due to other ocular disorders, unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H44.439 – Hypotony of eye due to other ocular disorders, unspecified eye
What it is
This code identifies low intraocular pressure in an unspecified eye when the hypotony is caused by another ocular disorder. Use it when the record links the low pressure to an eye condition, but laterality is not specified.
Clinical signs
Typical findings include abnormally reduced intraocular pressure and may be associated with a diseased eye. Clinical features vary; refer to documentation for the underlying ocular disorder and any recorded visual changes.
When to use this code
Use this code when the provider documents hypotony of the eye due to another eye disorder and does not specify right or left eye. It is also appropriate when the note clearly identifies an ocular cause but does not provide a more specific hypotony code. If the underlying disorder is documented separately, code it as instructed by the record.
Do not use for
Do not use this code for hypotony with a specified eye, or when the low pressure is not linked to another ocular disorder. Check documentation if the cause is systemic, traumatic, or otherwise unclear.
Coding tip
Verify both the cause and laterality before assigning H44.439; unspecified eye codes should not replace a documented right or left eye.