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M61.55 ICD-10-CA code: Other ossification of muscle, pelvic region and thigh

M61.55 is the ICD-10-CA code for “Other ossification of muscle, pelvic region and thigh” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.

Official description

M61.55

Other ossification of muscle, pelvic region and thigh

Short description: Other ossification of muscle pelv thigh

ICD-10-CA · Canada · Also written M6155

Notes for M61.55

As CIHI prints them, with any note M61.55 takes from the headings above it.

Excludes

Conditions classified elsewhere.

  • Dermatopolymyositis (M33.-)muscular dystrophies and myopathies (G71-G72)myopathy in:• amyloidosis (E85.-)• polyarteritis nodosa (M30.0)• rheumatoid arthritis (M05.3)• scleroderma (M34.-)• Sjögren's syndrome (M35.0)• systemic lupus erythematosus (M32.-)From M60-M63 Disorders of muscles
  • Certain:• conditions originating in the perinatal period (P00-P96)• disorders of the temporomandibular joint (K07.6)• infectious and parasitic diseases (A00-B99)compartment syndrome (T79.6)complications of pregnancy, childbirth and the puerperium (O00-O99)congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)endocrine, nutritional and metabolic diseases (E00-E90)injury, poisoning and certain other consequences of external causes (S00-T98)neoplasms (C00-D48)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)From Chapter 13: Diseases of the musculoskeletal system and connective tissue (M00-M99)

Note

  • [To review the anatomical site captured in the 5th character subclassification see Chapter XIII]From M61.5 Other ossification of muscle
  • The following fifth characters represent the following sites of involvement:0 Multiple sites1 Shoulder region: clavical , scapula — joint acromioclavicular, glenohumeral, sternoclavicular2 Upper arm: humerus — elbow joint,3 Forearm: radius , ulna — wrist joint,4 Hand: carpus, fingers, metacarpus — joints between these bones,5 Pelvic region and thigh: buttock , femur , pelvis — joint hip , sacroiliac6 Lower leg: fibula , tibia — knee joint7 Ankle and foot: metatarsus, tarsus, toes — other joints in foot8 Other:head neck ribs skull trunk vertebral column9 Site unspecifiedFrom Chapter 13: Diseases of the musculoskeletal system and connective tissue (M00-M99)

Where M61.55 sits

  1. 1ChapterChapter 13: Diseases of the musculoskeletal system and connective tissue (M00-M99)
  2. 2Block M60-M79Soft tissue disorders
  3. 3Block M60-M63Disorders of muscles
  4. 4Category M61Calcification and ossification of muscle
  5. 5Subcategory M61.5Other ossification of muscle
  6. 6Valid code M61.55Other ossification of muscle, pelvic region and thigh

Source and release

Data release
ICD-10-CA · FY 2026–2027
Effective date
Apr 1, 2026
Publisher
CIHI

This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.

See M61.55 in the CIHI source

Frequently asked questions

What does ICD-10-CA code M61.55 mean?

M61.55 is the ICD-10-CA code for “Other ossification of muscle, pelvic region and thigh” in CIHI’s ICD-10-CA FY 2026–2027 release.

Where is M61.55 in ICD-10-CA?

M61.55 sits under M61.5 Other ossification of muscle, within M61 Calcification and ossification of muscle, within M60-M63 Disorders of muscles, within M60-M79 Soft tissue disorders, within Chapter 13: Diseases of the musculoskeletal system and connective tissue (M00-M99).

What coding notes apply to M61.55?

ICD-10-CA lists Note, Excludes notes for M61.55, including those from the headings it sits under. They are listed on this page with where each one comes from.

Which ICD-10-CA release does this page use?

It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.

Codes beside M61.55

M61.50Other ossification of muscle, multiple sitesM61.51Other ossification of muscle, shoulder regionM61.52Other ossification of muscle, upper armM61.53Other ossification of muscle, forearmM61.54Other ossification of muscle, handM61.56Other ossification of muscle, lower legM61.57Other ossification of muscle, ankle and footM61.58Other ossification of muscle, other siteM61.59Other ossification of muscle, unspecified site