M61.12 – Myositis ossificans progressiva, upper arm

ICD-10-CM 2027 diagnosis code · Disorders of muscles

Non-billable header

ICD-10-CM code M61.12

Code: M61.12 (claims format: M6112)
Description: Myositis ossificans progressiva, upper arm
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 13. Diseases of the musculoskeletal system and connective tissue (M00-M99)
Block: M60-M63 Disorders of muscles
Parent codes: M61 › M61.1

Billable codes under M61.12

M61.12 is a header code and cannot be used on claims. Choose the most specific code:

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

M61.1 – Myositis ossificans progressiva

Applicable to:

Fibrodysplasia ossificans progressiva

Block M60-M63

Excludes1 (not coded here):

dermatopolymyositis (M33.-)
myopathy in amyloidosis (E85.-)
myopathy in polyarteritis nodosa (M30.0)
myopathy in rheumatoid arthritis (M05.32)
myopathy in scleroderma (M34.-)
myopathy in Sjögren's syndrome (M35.03)
myopathy in systemic lupus erythematosus (M32.-)

Excludes2 (not included here):

muscular dystrophies and myopathies (G71-G72)

Index terms for M61.12

Entries in the ICD-10-CM alphabetic index that lead to this code:

Myositis, ossificans or ossifying, progressiva, upper arm

Related codes in M61.1

Frequently asked questions

What is ICD-10 code M61.12?

M61.12 is the ICD-10-CM code for myositis ossificans progressiva, upper arm, in the block M60-M63 (Disorders of muscles).

Is M61.12 a billable code?

No. M61.12 is a header code with more specific child codes; report one of the billable codes listed above.

What category does M61.12 belong to?

It belongs to category M61 – Calcification and ossification of muscle.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.