ICD-10 Code H05.122 – Orbital myositis, left orbit (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H05.122 – Orbital myositis, left orbit
What it is
H05.122 identifies inflammation of the extraocular muscles in the left orbit. It is used when the record specifies orbital myositis affecting the left eye socket.
Clinical signs
Typical findings include orbital pain, pain with eye movement, and restricted motility of the affected eye. Swelling or proptosis may occur; clinical features vary, so refer to documentation.
When to use this code
Use this code when the clinician documents orbital myositis limited to the left orbit. It is appropriate for confirmed cases in outpatient, inpatient, or specialist notes. If laterality is not stated, check documentation before assigning a side-specific code.
Do not use for
Do not use it for nonspecific eye pain, general orbital inflammation, or myositis outside the orbit. If the record does not clearly support left-sided orbital involvement, check documentation.
Coding tip
Verify laterality carefully, because H05.122 is only for the left orbit.