ICD-10 Code H05.812 – Cyst of left orbit (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H05.812 – Cyst of left orbit
What it is
This code identifies a cyst located in the left orbit, the bony cavity that holds the eye. It is used when documentation specifies a cystic lesion on the left side only.
Clinical signs
Clinical features vary; refer to documentation. A left orbital cyst may be noted as a localized mass, swelling, or imaging finding in the orbit.
When to use this code
Use H05.812 when the record clearly documents a cyst of the left orbit. It fits outpatient, inpatient, or imaging-based diagnosis entries when the provider names the lesion and side. If the note only says “orbital cyst” without laterality, check documentation.
Do not use for
Do not use this code for right or unspecified orbital cysts, or for non-cystic orbital masses. If the lesion is described differently, such as a tumor or abscess, use the documented condition.
Coding tip
Verify laterality in the provider note or imaging report before assigning H05.812.