2023 ICD-10-CM Diagnosis Code M60.9

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Myositis, unspecified

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • M60.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2023 edition of ICD-10-CM M60.9 became effective on October 1, 2022.
  • This is the American ICD-10-CM version of M60.9 - other international versions of ICD-10 M60.9 may differ.
The following code(s) above M60.9 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to M60.9:
  • M00-M99
    2023 ICD-10-CM Range M00-M99

    Diseases of the musculoskeletal system and connective tissue

    • Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
    Type 2 Excludes
    • arthropathic psoriasis (L40.5-)
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • compartment syndrome (traumatic) (T79.A-)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    Diseases of the musculoskeletal system and connective tissue
  • M60-M63
    2023 ICD-10-CM Range M60-M63

    Disorders of muscles

    Type 1 Excludes
    • 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.-)
    Type 2 Excludes
    • muscular dystrophies and myopathies (G71-G72)
    Disorders of muscles
  • M60
    ICD-10-CM Diagnosis Code M60


      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Type 2 Excludes
    • inclusion body myositis [IBM] (G72.41)
Approximate Synonyms
  • Myositis
  • Myositis (muscle inflammation)
  • Myositis of bilateral feet
  • Myositis of bilateral forearms
  • Myositis of bilateral hands
  • Myositis of bilateral lower legs
  • Myositis of bilateral shoulders
  • Myositis of bilateral thighs
  • Myositis of bilateral upper arms
  • Myositis of left ankle
  • Myositis of left foot
  • Myositis of left forearm
  • Myositis of left hand
  • Myositis of left lower leg
  • Myositis of left shoulder
  • Myositis of left thigh
  • Myositis of left upper arm
  • Myositis of right foot
  • Myositis of right forearm
  • Myositis of right hand
  • Myositis of right lower leg
  • Myositis of right shoulder
  • Myositis of right thigh
  • Myositis of right upper arm
Clinical Information
  • A disorder characterized by inflammation involving the skeletal muscles.
  • An inflammatory process affecting the skeletal muscles. Causes include infections, injuries, and autoimmune disorders.
  • Inflammation of a muscle or muscle tissue.
  • Inflammation of skeletal muscle, not including inflammation of cardiac muscle
  • Inflammation of skeletal muscle.
  • Myositis is inflammation of your skeletal muscles, which are also called the voluntary muscles. These are the muscles you consciously control that help you move your body. An injury, infection or autoimmune disease can cause myositis. The diseases dermatomyositis and polymyositis both involve myositis. Polymyositis causes muscle weakness, usually in the muscles closest to the trunk of your body. Dermatomyositis causes muscle weakness, plus a skin rash. Both diseases are usually treated with prednisone, a steroid medicine, and sometimes other medicines.
ICD-10-CM M60.9 is grouped within Diagnostic Related Group(s) (MS-DRG v40.0):
  • 555 Signs and symptoms of musculoskeletal system and connective tissue with mcc
  • 556 Signs and symptoms of musculoskeletal system and connective tissue without mcc

Convert M60.9 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change

Diagnosis Index entries containing back-references to M60.9:

ICD-10-CM Codes Adjacent To M60.9
M60.86 Other myositis, lower leg
M60.861 Other myositis, right lower leg
M60.862 Other myositis, left lower leg
M60.869 Other myositis, unspecified lower leg
M60.87 Other myositis, ankle and foot
M60.871 Other myositis, right ankle and foot
M60.872 Other myositis, left ankle and foot
M60.879 Other myositis, unspecified ankle and foot
M60.88 …… other site
M60.89 …… multiple sites
M60.9 Myositis, unspecified
M61 Calcification and ossification of muscle
M61.0 Myositis ossificans traumatica
M61.00 …… unspecified site
M61.01 Myositis ossificans traumatica, shoulder
M61.011 Myositis ossificans traumatica, right shoulder
M61.012 Myositis ossificans traumatica, left shoulder
M61.019 Myositis ossificans traumatica, unspecified shoulder
M61.02 Myositis ossificans traumatica, upper arm
M61.021 Myositis ossificans traumatica, right upper arm
M61.022 Myositis ossificans traumatica, left upper arm

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.