ICD-10 Code H05.349 – Enlargement of unspecified orbit (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H05.349 – Enlargement of unspecified orbit
What it is
H05.349 identifies abnormal enlargement of the orbit, the bony cavity that holds the eye, when the side or specific orbit is not documented. Use it for a structural finding, not a symptom label.
Clinical signs
Clinical features may include visible widening of the eye socket, facial asymmetry, or imaging showing an enlarged orbital cavity. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record documents enlargement of an unspecified orbit and does not specify right or left. It may appear in imaging reports, ophthalmology notes, or specialist assessments describing orbital enlargement. If the note only says “orbital abnormality,” check documentation.
Do not use for
Do not use this code for proptosis, orbital mass, or trauma-related swelling unless enlargement of the orbit is specifically documented. Do not assume laterality or a different orbital disorder.
Coding tip
Verify whether the provider named the right or left orbit before assigning the unspecified code.