ICD-10 Code H05.00 – Unspecified acute inflammation of orbit (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H05.00 – Unspecified acute inflammation of orbit
What it is
H05.00 identifies an acute inflammatory process involving the orbit when the provider does not document a more specific orbital diagnosis. Use it for nonspecific orbital inflammation affecting the tissues around the eye.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include orbital pain, swelling, redness, and eye movement discomfort, but you should code only what the provider confirms.
When to use this code
Use this code when the record states acute orbital inflammation but does not name a cause, side, or more specific subtype. It also fits cases where the diagnosis remains unspecified after evaluation. If the note describes a different orbital disorder, check documentation.
Do not use for
Do not use H05.00 for chronic orbital inflammation, a clearly specified infectious process, or a documented abscess. If the provider identifies another orbital condition, choose that more specific code.
Coding tip
Query for laterality, cause, and specificity whenever the chart says only “orbital inflammation.”