ICD-10 Code H05.342 – Enlargement of left orbit (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H05.342 – Enlargement of left orbit
What it is
H05.342 identifies abnormal enlargement of the left orbital cavity. Use it when the left bony eye socket is documented as enlarged, not simply when the eye appears prominent.
Clinical signs
Findings may include visible asymmetry of the left orbit, proptosis, or imaging evidence of increased orbital size. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record specifically states enlargement of the left orbit, such as on exam, CT, or MRI. It may apply in congenital, developmental, or acquired settings if the left side is identified. You should code the documented laterality exactly.
Do not use for
Do not use this code for generic eye protrusion, orbital mass, or swelling without documented orbital enlargement. Check documentation if the note describes a different orbital disorder or laterality.
Coding tip
Confirm that the provider documents the left orbit, not the globe, eyelid, or unspecified orbital abnormality.