2020 ICD-10-CM Diagnosis Code M79.1

Myalgia

    2016 2017 2018 2019 - Converted to Parent Code 2020 Non-Billable/Non-Specific Code
  • M79.1 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2020 edition of ICD-10-CM M79.1 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of M79.1 - other international versions of ICD-10 M79.1 may differ.
Applicable To
  • Myofascial pain syndrome
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 M79.1. 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
    )
  • myositis (
    ICD-10-CM Diagnosis Code M60
    • M60 Myositis
      • M60.0 Infective myositis
        • M60.00 Infective myositis, unspecified site
          • M60.000 Infective myositis, unspecified right arm
          • M60.001 Infective myositis, unspecified left arm
          • M60.002 Infective myositis, unspecified arm
          • M60.003 Infective myositis, unspecified right leg
          • M60.004 Infective myositis, unspecified left leg
          • M60.005 Infective myositis, unspecified leg
          • M60.009 Infective myositis, unspecified site
        • M60.01 Infective myositis, shoulder
          • M60.011 Infective myositis, right shoulder
          • M60.012 Infective myositis, left shoulder
          • M60.019 Infective myositis, unspecified shoulder
        • M60.02 Infective myositis, upper arm
          • M60.021 Infective myositis, right upper arm
          • M60.022 Infective myositis, left upper arm
          • M60.029 Infective myositis, unspecified upper arm
        • M60.03 Infective myositis, forearm
          • M60.031 Infective myositis, right forearm
          • M60.032 Infective myositis, left forearm
          • M60.039 Infective myositis, unspecified forearm
        • M60.04 Infective myositis, hand and fingers
          • M60.041 Infective myositis, right hand
          • M60.042 Infective myositis, left hand
          • M60.043 Infective myositis, unspecified hand
          • M60.044 Infective myositis, right finger(s)
          • M60.045 Infective myositis, left finger(s)
          • M60.046 Infective myositis, unspecified finger(s)
        • M60.05 Infective myositis, thigh
          • M60.051 Infective myositis, right thigh
          • M60.052 Infective myositis, left thigh
          • M60.059 Infective myositis, unspecified thigh
        • M60.06 Infective myositis, lower leg
          • M60.061 Infective myositis, right lower leg
          • M60.062 Infective myositis, left lower leg
          • M60.069 Infective myositis, unspecified lower leg
        • M60.07 Infective myositis, ankle, foot and toes
          • M60.070 Infective myositis, right ankle
          • M60.071 Infective myositis, left ankle
          • M60.072 Infective myositis, unspecified ankle
          • M60.073 Infective myositis, right foot
          • M60.074 Infective myositis, left foot
          • M60.075 Infective myositis, unspecified foot
          • M60.076 Infective myositis, right toe(s)
          • M60.077 Infective myositis, left toe(s)
          • M60.078 Infective myositis, unspecified toe(s)
        • M60.08 …… other site
        • M60.09 …… multiple sites
      • M60.1 Interstitial myositis
        • M60.10 …… of unspecified site
        • M60.11 Interstitial myositis, shoulder
          • M60.111 Interstitial myositis, right shoulder
          • M60.112 Interstitial myositis, left shoulder
          • M60.119 Interstitial myositis, unspecified shoulder
        • M60.12 Interstitial myositis, upper arm
          • M60.121 Interstitial myositis, right upper arm
          • M60.122 Interstitial myositis, left upper arm
          • M60.129 Interstitial myositis, unspecified upper arm
        • M60.13 Interstitial myositis, forearm
          • M60.131 Interstitial myositis, right forearm
          • M60.132 Interstitial myositis, left forearm
          • M60.139 Interstitial myositis, unspecified forearm
        • M60.14 Interstitial myositis, hand
          • M60.141 Interstitial myositis, right hand
          • M60.142 Interstitial myositis, left hand
          • M60.149 Interstitial myositis, unspecified hand
        • M60.15 Interstitial myositis, thigh
          • M60.151 Interstitial myositis, right thigh
          • M60.152 Interstitial myositis, left thigh
          • M60.159 Interstitial myositis, unspecified thigh
        • M60.16 Interstitial myositis, lower leg
          • M60.161 Interstitial myositis, right lower leg
          • M60.162 Interstitial myositis, left lower leg
          • M60.169 Interstitial myositis, unspecified lower leg
        • M60.17 Interstitial myositis, ankle and foot
          • M60.171 Interstitial myositis, right ankle and foot
          • M60.172 Interstitial myositis, left ankle and foot
          • M60.179 Interstitial myositis, unspecified ankle and ...
        • M60.18 …… other site
        • M60.19 …… multiple sites
      • M60.2 Foreign body granuloma of soft tissue, not el...
        • M60.20 Foreign body granuloma of soft tissue, not el...
        • M60.21 Foreign body granuloma of soft tissue, not el...
          • M60.211 Foreign body granuloma of soft tissue, not el...
          • M60.212 Foreign body granuloma of soft tissue, not el...
          • M60.219 Foreign body granuloma of soft tissue, not el...
        • M60.22 Foreign body granuloma of soft tissue, not el...
          • M60.221 Foreign body granuloma of soft tissue, not el...
          • M60.222 Foreign body granuloma of soft tissue, not el...
          • M60.229 Foreign body granuloma of soft tissue, not el...
        • M60.23 Foreign body granuloma of soft tissue, not el...
          • M60.231 Foreign body granuloma of soft tissue, not el...
          • M60.232 Foreign body granuloma of soft tissue, not el...
          • M60.239 Foreign body granuloma of soft tissue, not el...
        • M60.24 Foreign body granuloma of soft tissue, not el...
          • M60.241 Foreign body granuloma of soft tissue, not el...
          • M60.242 Foreign body granuloma of soft tissue, not el...
          • M60.249 Foreign body granuloma of soft tissue, not el...
        • M60.25 Foreign body granuloma of soft tissue, not el...
          • M60.251 Foreign body granuloma of soft tissue, not el...
          • M60.252 Foreign body granuloma of soft tissue, not el...
          • M60.259 Foreign body granuloma of soft tissue, not el...
        • M60.26 Foreign body granuloma of soft tissue, not el...
          • M60.261 Foreign body granuloma of soft tissue, not el...
          • M60.262 Foreign body granuloma of soft tissue, not el...
          • M60.269 Foreign body granuloma of soft tissue, not el...
        • M60.27 Foreign body granuloma of soft tissue, not el...
          • M60.271 Foreign body granuloma of soft tissue, not el...
          • M60.272 Foreign body granuloma of soft tissue, not el...
          • M60.279 Foreign body granuloma of soft tissue, not el...
        • M60.28 Foreign body granuloma of soft tissue, not el...
      • M60.8 Other myositis
        • M60.80 …… unspecified site
        • M60.81 Other myositis shoulder
          • M60.811 Other myositis, right shoulder
          • M60.812 Other myositis, left shoulder
          • M60.819 Other myositis, unspecified shoulder
        • M60.82 Other myositis, upper arm
          • M60.821 Other myositis, right upper arm
          • M60.822 Other myositis, left upper arm
          • M60.829 Other myositis, unspecified upper arm
        • M60.83 Other myositis, forearm
          • M60.831 Other myositis, right forearm
          • M60.832 Other myositis, left forearm
          • M60.839 Other myositis, unspecified forearm
        • M60.84 Other myositis, hand
          • M60.841 Other myositis, right hand
          • M60.842 Other myositis, left hand
          • M60.849 Other myositis, unspecified hand
        • M60.85 Other myositis, thigh
          • M60.851 Other myositis, right thigh
          • M60.852 Other myositis, left thigh
          • M60.859 Other myositis, unspecified thigh
        • 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
    M60.-
    )
The following code(s) above M79.1 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 M79.1:
  • 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
  • Abdominal muscle pain
  • Cervical myofascial pain syndrome
  • Fibrositis of neck
  • Lumbar myofascial pain syndrome
  • Muscle pain
  • Muscle pain, abdominal
  • Musculoskeletal pain
  • Myalgia (muscle pain)
  • Myalgia caused by statin
  • Myalgia due to statin
  • Myofacial pain syndrome with lumbar involvement
  • Myofacial pain syndrome with thoracic involvement
  • Myofacial tender points
  • Myofascial pain syndrome
  • Myofascial pain syndrome, cervical (neck)
  • Myofascial pain syndrome, thoracic
  • Myofascial tender points
  • Thoracic myofascial pain syndrome
Clinical Information
  • (my-al-juh) pain in a muscle or group of muscles.
  • A chronic disorder of unknown etiology characterized by pain, stiffness, and tenderness in the muscles of neck, shoulders, back, hips, arms, and legs. Other signs and symptoms include headaches, fatigue, sleep disturbances, and painful menstruation.
  • A common nonarticular rheumatic condition that is characterized by muscle pain, tenderness, and stiffness.
  • A common nonarticular rheumatic syndrome characterized by myalgia and multiple points of focal muscle tenderness to palpation (trigger points). Muscle pain is typically aggravated by inactivity or exposure to cold. This condition is often associated with general symptoms, such as sleep disturbances, fatigue, stiffness, headaches, and occasionally depression. There is significant overlap between fibromyalgia and the chronic fatigue syndrome (fatigue syndrome, chronic). Fibromyalgia may arise as a primary or secondary disease process. It is most frequent in females aged 20 to 50 years. (from Adams et al., Principles of Neurology, 6th ed, p1494-95)
  • A disorder characterized by marked discomfort sensation originating from a muscle or group of muscles.
  • An acute, subacute, or chronic painful state of muscles, subcutaneous tissues, ligaments, tendons, or fasciae caused by a number of agents such as trauma, strain, occupation, exposure, posture, infection, or arthritis.
  • Fibromyalgia makes you feel tired and causes muscle pain and "tender points." tender points are places on the neck, shoulders, back, hips, arms or legs that hurt when touched. People with fibromyalgia may have other symptoms, such as trouble sleeping, morning stiffness, headaches, and problems with thinking and memory, sometimes called "fibro fog."no one knows what causes fibromyalgia. Anyone can get it, but it is most common in middle-aged women. People with rheumatoid arthritis and other autoimmune diseases are particularly likely to develop fibromyalgia. There is no cure for fibromyalgia, but medicines can help you manage your symptoms. Getting enough sleep and exercising may also help. nih: national institute of arthritis and musculoskeletal and skin diseases
  • Inflammation and fibrous degeneration of a muscle.
  • Myalgia: pain or aching in a muscle or muscles.
  • Pain in a muscle or group of muscles.
  • Painful sensation originating from a muscle or group of muscles.
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): Deleted code
  • 2019 (effective 10/1/2018): New code
  • 2020 (effective 10/1/2019): No change
Code annotations containing back-references to M79.1:
  • Type 1 Excludes: M62
    ICD-10-CM Diagnosis Code M62

    Other disorders of muscle

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    Type 2 Excludes
    • nontraumatic hematoma of muscle (M79.81)
  • Type 2 Excludes: G89
    ICD-10-CM Diagnosis Code G89

    Pain, not elsewhere classified

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Code Also
    • related psychological factors associated with pain (F45.42)
    Type 1 Excludes
    • generalized pain NOS (R52)
    • pain disorders exclusively related to psychological factors (F45.41)
    • pain NOS (R52)
    Type 2 Excludes
ICD-10-CM Codes Adjacent To M79.1
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
M79.60 Pain in limb, unspecified

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