H05.121 Orbital myositis, right orbit

Billable ICD-10-CM code, FY2026.

Applies from H05 Disorders of orbit

Excludes1 (never code together)

• congenital malformation of orbit (Q10.7)

MS-DRG index

Defines the logic of DRG(s) 124-125 in MDC 02.

Approximate ICD-9-CM (GEMs)

• 376.12 Orbital myositis (approximate)

Nearby codes

• H05.111 Granuloma of right orbit
• H05.112 Granuloma of left orbit
• H05.113 Granuloma of bilateral orbits
• H05.119 Granuloma of unspecified orbit
• H05.12 Orbital myositis
• H05.121 Orbital myositis, right orbit (this code)
• H05.122 Orbital myositis, left orbit
• H05.123 Orbital myositis, bilateral
• H05.129 Orbital myositis, unspecified orbit
• H05.2 Exophthalmic conditions
• H05.20 Unspecified exophthalmos