ICD-10 Code H05.039 – Periostitis of unspecified orbit (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H05.039 – Periostitis of unspecified orbit
What it is
H05.039 identifies periostitis affecting the orbit when the specific side is not documented. It refers to inflammation of the periosteum around the orbital bones, not the eye itself.
Clinical signs
Clinical features vary; refer to documentation. Commonly reported findings may include orbital pain, tenderness, swelling, or redness around the eye, but you should code only when periostitis is documented.
When to use this code
Use H05.039 when the provider documents periostitis of the orbit and does not specify right or left. This code fits radiology, specialist, or discharge documentation that clearly names orbital periostitis. If the note describes another orbital disorder, check documentation before assigning this code.
Do not use for
Do not use this code for nonspecific eye pain, conjunctivitis, cellulitis, or general orbital inflammation without periostitis. If the record identifies a laterality, use the more specific code instead.
Coding tip
Verify that “periostitis” and “orbit” both appear in the provider’s documentation before coding H05.039.