M61.121 Myositis ossificans progressiva, right upper arm

Billable ICD-10-CM code, FY2026.

Applies from M61.1 Myositis ossificans progressiva

Applicable to

• Fibrodysplasia ossificans progressiva

MS-DRG index

Defines the logic of DRG(s) 557-558 in MDC 08.

Approximate ICD-9-CM (GEMs)

• 728.11 Progressive myositis ossificans (approximate)

Nearby codes

• M61.11 Myositis ossificans progressiva, shoulder
• M61.111 Myositis ossificans progressiva, right shoulder
• M61.112 Myositis ossificans progressiva, left shoulder
• M61.119 Myositis ossificans progressiva, unspecified shoulder
• M61.12 Myositis ossificans progressiva, upper arm
• M61.121 Myositis ossificans progressiva, right upper arm (this code)
• M61.122 Myositis ossificans progressiva, left upper arm
• M61.129 Myositis ossificans progressiva, unspecified upper arm
• M61.13 Myositis ossificans progressiva, forearm
• M61.131 Myositis ossificans progressiva, right forearm
• M61.132 Myositis ossificans progressiva, left forearm