ICD-10 Code H05.819 – Cyst of unspecified orbit (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H05.819 – Cyst of unspecified orbit
What it is
This code identifies a cyst located in the orbit, but the exact type or side is not specified. Use it when the record confirms an orbital cyst and no more precise diagnosis is documented.
Clinical signs
Clinical features vary; refer to documentation. Orbital cysts may be noted as a mass, swelling, or eye displacement on exam or imaging, but you should code only what is recorded.
When to use this code
Use H05.819 when the provider documents an orbital cyst and does not specify whether it is congenital, acquired, or linked to another condition. It also fits when laterality is missing. If the note names a more specific orbital disorder, choose that code instead.
Do not use for
Do not use this code for cysts outside the orbit or for a clearly identified orbital lesion with a more specific ICD-10-CM code. Check documentation if the record describes a mass without confirming a cyst.
Coding tip
Code from the provider’s exact wording and confirm that “orbit” and “cyst” are both documented.