2019/2020

  1. ICD-10-CM Codes
    2. ›
  2. M00-M99 Diseases of the musculoskeletal system and connective tissue
    3. ›
  3. M70-M79 Other soft tissue disorders
    4. ›
  4. M79- Other and unspecified soft tissue disorders, not elsewhere classified
    5. ›

2020 ICD-10-CM Diagnosis Code M79.0

Rheumatism, unspecified

    2016 2017 2018 2019 2020 Billable/Specific Code
  • M79.0 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2020 edition of ICD-10-CM M79.0 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of M79.0 - other international versions of ICD-10 M79.0 may differ.
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as M79.0. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • fibromyalgia (
    ICD-10-CM Diagnosis Code M79.7

    Fibromyalgia

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Fibromyositis
    • Fibrositis
    • Myofibrositis
    M79.7
    )
  • palindromic rheumatism (
    ICD-10-CM Diagnosis Code M12.3

    Palindromic rheumatism

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    M12.3-
    )
The following code(s) above M79.0 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 M79.0:
  • M00-M99
    2020 ICD-10-CM Range M00-M99

    Diseases of the musculoskeletal system and connective tissue

    Note
    • 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
  • M79
    ICD-10-CM Diagnosis Code M79

    Other and unspecified soft tissue disorders, not elsewhere classified

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • psychogenic rheumatism (F45.8)
    • soft tissue pain, psychogenic (F45.41)
    Other and unspecified soft tissue disorders, not elsewhere classified
Approximate Synonyms
  • Rheumatism
Clinical Information
  • A group of disorders marked by inflammation or pain in the connective tissue structures of the body. These structures include bone, cartilage, and fat.
  • Any of a variety of disorders marked by inflammation, degeneration, or metabolic derangement of the connective tissue structures of the body, especially the joints and related structures, including muscles, bursae, tendons, and fibrous tissue.
  • Disorders of connective tissue, especially the joints and related structures, characterized by inflammation, degeneration, or metabolic derangement.
ICD-10-CM M79.0 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 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 M79.0 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

Diagnosis Index entries containing back-references to M79.0:
  • Rheumatism (articular) (neuralgic) (nonarticular) M79.0

ICD-10-CM Codes Adjacent To M79.0
M77.40 …… unspecified foot
M77.41 …… right foot
M77.42 …… left foot
M77.5 Other enthesopathy of foot and ankle
M77.50 Other enthesopathy of unspecified foot and ankle
M77.51 Other enthesopathy of right foot and ankle
M77.52 Other enthesopathy of left foot and ankle
M77.8 Other enthesopathies, not elsewhere classified
M77.9 Enthesopathy, unspecified
M79 Other and unspecified soft tissue disorders, not elsewhere classified
M79.0 Rheumatism, unspecified
M79.1 Myalgia
M79.10 …… unspecified site
M79.11 …… of mastication muscle
M79.12 …… of auxiliary muscles, head and neck
M79.18 …… other site
M79.2 Neuralgia and neuritis, unspecified
M79.3 Panniculitis, unspecified
M79.4 Hypertrophy of (infrapatellar) fat pad
M79.5 Residual foreign body in soft tissue
M79.6 Pain in limb, hand, foot, fingers and toes

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

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