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M60.99 ICD-10-CA code: Myositis unspecified, unspecified site

M60.99 is the ICD-10-CA code for “Myositis unspecified, unspecified site” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.

Official description

M60.99

Myositis unspecified, unspecified site

Short description: Unspecified myositis unspecified site

ICD-10-CA · Canada · Also written M6099

Notes for M60.99

As CIHI prints them, with any note M60.99 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 M60.9 Myositis, unspecified
  • 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 M60.99 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 M60Myositis
  5. 5Subcategory M60.9Myositis, unspecified
  6. 6Valid code M60.99Myositis unspecified, unspecified site

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 M60.99 in the CIHI source

Frequently asked questions

What does ICD-10-CA code M60.99 mean?

M60.99 is the ICD-10-CA code for “Myositis unspecified, unspecified site” in CIHI’s ICD-10-CA FY 2026–2027 release.

Where is M60.99 in ICD-10-CA?

M60.99 sits under M60.9 Myositis, unspecified, within M60 Myositis, 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 M60.99?

ICD-10-CA lists Note, Excludes notes for M60.99, 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 M60.99

M60.90Myositis, unspecified, multiple sitesM60.91Myositis, unspecified, shoulder regionM60.92Myositis, unspecified, upper armM60.93Myositis, unspecified, forearmM60.94Myositis, unspecified, handM60.95Myositis, unspecified, pelvic region and thighM60.96Myositis, unspecified, lower legM60.97Myositis, unspecified, ankle and footM60.98Myositis, unspecified, other site