M61.1 – Myositis ossificans progressiva

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

Non-billable header

ICD-10-CM code M61.1

Code: M61.1 (claims format: M611)
Description: Myositis ossificans progressiva
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

Billable codes under M61.1

M61.1 is a header code and cannot be used on claims. Choose the most specific code:

M61.10 – Myositis ossificans progressiva, unspecified siteBillable
M61.11 – Myositis ossificans progressiva, shoulderHeader (more codes below)
M61.12 – Myositis ossificans progressiva, upper armHeader (more codes below)
M61.13 – Myositis ossificans progressiva, forearmHeader (more codes below)
M61.14 – Myositis ossificans progressiva, hand and finger(s)Header (more codes below)
M61.15 – Myositis ossificans progressiva, thighHeader (more codes below)
M61.16 – Myositis ossificans progressiva, lower legHeader (more codes below)
M61.17 – Myositis ossificans progressiva, ankle, foot and toe(s)Header (more codes below)
M61.18 – Myositis ossificans progressiva, other siteBillable
M61.19 – Myositis ossificans progressiva, multiple sitesBillable

Notes for M61.1

Applicable to:

Fibrodysplasia ossificans progressiva

Notes inherited from parent codes

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

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)

Related codes in M61

Frequently asked questions

What is ICD-10 code M61.1?

M61.1 is the ICD-10-CM code for myositis ossificans progressiva, in the block M60-M63 (Disorders of muscles).

Is M61.1 a billable code?

No. M61.1 is a header code with more specific child codes; report one of the billable codes listed above.

What category does M61.1 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.