M61.421 Other calcification of muscle, right upper arm

Billable ICD-10-CM code, FY2026.

Applies from M61.4 Other calcification of muscle

Excludes1 (never code together)

• calcific tendinitis NOS (M65.2-)
• calcific tendinitis of shoulder (M75.3)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 728.19 Other muscular calcification and ossification (approximate)

Nearby codes

• M61.41 Other calcification of muscle, shoulder
• M61.411 Other calcification of muscle, right shoulder
• M61.412 Other calcification of muscle, left shoulder
• M61.419 Other calcification of muscle, unspecified shoulder
• M61.42 Other calcification of muscle, upper arm
• M61.421 Other calcification of muscle, right upper arm (this code)
• M61.422 Other calcification of muscle, left upper arm
• M61.429 Other calcification of muscle, unspecified upper arm
• M61.43 Other calcification of muscle, forearm
• M61.431 Other calcification of muscle, right forearm
• M61.432 Other calcification of muscle, left forearm