M61.9 Calcification and ossification of muscle, unspecified

Billable ICD-10-CM code, FY2026.

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 728.10 Calcification and ossification, unspecified (approximate)

Diagnosis Index entries for M61.9

• Calcification › muscle

Nearby codes

• M61.571 Other ossification of muscle, right ankle and foot
• M61.572 Other ossification of muscle, left ankle and foot
• M61.579 Other ossification of muscle, unspecified ankle and foot
• M61.58 Other ossification of muscle, other site
• M61.59 Other ossification of muscle, multiple sites
• M61.9 Calcification and ossification of muscle, unspecified (this code)