ICD-10 Code H05.123 – Orbital Myositis, Bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H05.123 – Orbital myositis, bilateral
What it is
H05.123 identifies inflammation of the extraocular muscles in both orbits. Use it when documentation specifies bilateral orbital myositis, a localized inflammatory condition affecting eye movement structures.
Clinical signs
Typical findings include orbital pain, pain with eye movement, diplopia, and restricted extraocular motility. Clinical features vary; refer to documentation.
When to use this code
Use H05.123 when the provider documents bilateral orbital myositis or bilateral inflammation of the orbital muscles. This code fits confirmed diagnoses in outpatient, inpatient, or specialist notes. If the record only says “orbital inflammation” or does not specify laterality, check documentation before coding.
Do not use for
Do not use this code for nonspecific eye pain, orbital cellulitis, or myopathy unrelated to the orbit. If the condition is unilateral or unspecified, choose the corresponding code instead.
Coding tip
Confirm both the diagnosis and laterality in the provider note before assigning H05.123.