ICD-10 Code H44.449 – Primary hypotony of unspecified eye (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H44.449 – Primary hypotony of unspecified eye
What it is
This code identifies primary hypotony affecting an eye when the eye is not otherwise specified. It refers to abnormally low intraocular pressure without a documented secondary cause.
Clinical signs
Clinical features vary; refer to documentation. Findings may include a soft eye, shallow anterior chamber, or visual disturbance, but the record should support hypotony and note the unspecified eye.
When to use this code
Use H44.449 when the provider documents primary hypotony and does not identify a right or left eye. Apply it when the chart clearly states hypotony as the diagnosis and no secondary cause is documented.
If the note only mentions low eye pressure without confirming primary hypotony, check documentation before coding. You should also confirm that laterality is not available elsewhere in the record.
Do not use for
Do not use this code for hypotony with a documented cause, such as surgery or trauma. Do not use it when the affected eye is specified and a more precise laterality code applies.
Coding tip
Verify both etiology and laterality in the provider note before assigning H44.449.