ICD-10 Code H05.34 – Enlargement of orbit (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H05.34 – Enlargement of orbit
What it is
H05.34 identifies abnormal enlargement of the bony orbit, the eye socket. Use it when the orbit itself is documented as enlarged, not when the eyeball or eyelids are the main issue.
Clinical signs
Findings may include a visibly widened orbital area, facial asymmetry, or imaging evidence of increased orbital size. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents enlargement of the orbit on exam, imaging, or specialist evaluation. It fits cases where the diagnosis is orbital enlargement as the recorded condition, even if the cause is still being evaluated. If the record names a specific underlying disorder, code that condition instead when instructed.
Do not use for
Do not use H05.34 for proptosis, orbital mass, or eye swelling unless the orbit itself is documented as enlarged. Check documentation.
Coding tip
Query for the exact anatomic site and cause if the note mentions “bulging eye” or facial asymmetry without stating orbital enlargement.