ICD-10-CM > H00-H59 > H00-H05 > H05 > H05.1 > H05.12 H05.12 Orbital myositis Non-Billable/Non-Specific Codes H05.121Orbital myositis, right orbitH05.122Orbital myositis, left orbitH05.123Orbital myositis, bilateralH05.129Orbital myositis, unspecified orbit