ICD-10-CM Code M79

Other and unspecified soft tissue disorders, not elsewhere classified

Version 2020 Non-Billable Code

Not Valid for Submission

M79 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of other and unspecified soft tissue disorders, not elsewhere classified. The code is NOT valid for the year 2020 for the submission of HIPAA-covered transactions.

ICD-10:M79
Short Description:Oth and unsp soft tissue disorders, not elsewhere classified
Long Description:Other and unspecified soft tissue disorders, not elsewhere classified

Consider the following ICD-10 codes with a higher level of specificity:

  • M79.0 - Rheumatism, unspecified
  • M79.1 - Myalgia
  • M79.10 - Myalgia, unspecified site
  • M79.11 - Myalgia of mastication muscle
  • M79.12 - Myalgia of auxiliary muscles, head and neck
  • M79.18 - Myalgia, 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
  • M79.601 - Pain in right arm
  • M79.602 - Pain in left arm
  • M79.603 - Pain in arm, unspecified
  • M79.604 - Pain in right leg
  • M79.605 - Pain in left leg
  • M79.606 - Pain in leg, unspecified
  • M79.609 - Pain in unspecified limb
  • M79.62 - Pain in upper arm
  • M79.621 - Pain in right upper arm
  • M79.622 - Pain in left upper arm
  • M79.629 - Pain in unspecified upper arm
  • M79.63 - Pain in forearm
  • M79.631 - Pain in right forearm
  • M79.632 - Pain in left forearm
  • M79.639 - Pain in unspecified forearm
  • M79.64 - Pain in hand and fingers
  • M79.641 - Pain in right hand
  • M79.642 - Pain in left hand
  • M79.643 - Pain in unspecified hand
  • M79.644 - Pain in right finger(s)
  • M79.645 - Pain in left finger(s)
  • M79.646 - Pain in unspecified finger(s)
  • M79.65 - Pain in thigh
  • M79.651 - Pain in right thigh
  • M79.652 - Pain in left thigh
  • M79.659 - Pain in unspecified thigh
  • M79.66 - Pain in lower leg
  • M79.661 - Pain in right lower leg
  • M79.662 - Pain in left lower leg
  • M79.669 - Pain in unspecified lower leg
  • M79.67 - Pain in foot and toes
  • M79.671 - Pain in right foot
  • M79.672 - Pain in left foot
  • M79.673 - Pain in unspecified foot
  • M79.674 - Pain in right toe(s)
  • M79.675 - Pain in left toe(s)
  • M79.676 - Pain in unspecified toe(s)
  • M79.7 - Fibromyalgia
  • M79.8 - Other specified soft tissue disorders
  • M79.81 - Nontraumatic hematoma of soft tissue
  • M79.89 - Other specified soft tissue disorders
  • M79.9 - Soft tissue disorder, unspecified
  • M79.A - Nontraumatic compartment syndrome
  • M79.A1 - Nontraumatic compartment syndrome of upper extremity
  • M79.A11 - Nontraumatic compartment syndrome of right upper extremity
  • M79.A12 - Nontraumatic compartment syndrome of left upper extremity
  • M79.A19 - Nontraumatic compartment syndrome of unspecified upper extremity
  • M79.A2 - Nontraumatic compartment syndrome of lower extremity
  • M79.A21 - Nontraumatic compartment syndrome of right lower extremity
  • M79.A22 - Nontraumatic compartment syndrome of left lower extremity
  • M79.A29 - Nontraumatic compartment syndrome of unspecified lower extremity
  • M79.A3 - Nontraumatic compartment syndrome of abdomen
  • M79.A9 - Nontraumatic compartment syndrome of other sites

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code M79:

Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • psychogenic rheumatism F45.8
  • soft tissue pain, psychogenic F45.41

Code Classification

  • Diseases of the musculoskeletal system and connective tissue (M00–M99)
    • Other soft tissue disorders (M70-M79)
      • Oth and unsp soft tissue disorders, not elsewhere classified (M79)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Patients


Connective Tissue Disorders

Your connective tissue supports many different parts of your body, such as your skin, eyes, and heart. It is like a "cellular glue" that gives your body parts their shape and helps keep them strong. It also helps some of your tissues do their work. It is made of many kinds of proteins. Cartilage and fat are types of connective tissue.

Over 200 disorders that impact connective tissue. There are different types:

  • Genetic disorders, such as Ehlers-Danlos syndrome, Marfan syndrome, and osteogenesis imperfecta
  • Autoimmune disorders, such as lupus and scleroderma
  • Cancers, like some types of soft tissue sarcoma

Each disorder has its own symptoms and needs different treatment.

NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases


[Learn More]

Joint Disorders

A joint is where two or more bones come together, like the knee, hip, elbow, or shoulder. Joints can be damaged by many types of injuries or diseases, including

  • Arthritis - inflammation of a joint. It causes pain, stiffness, and swelling. Over time, the joint can become severely damaged.
  • Bursitis - inflammation of a fluid-filled sac that cushions the joint
  • Dislocations - injuries that force the ends of the bones out of position

Treatment of joint problems depends on the cause. If you have a sports injury, treatment often begins with the RICE (Rest, Ice, Compression, and Elevation) method to relieve pain, reduce swelling, and speed healing. Other possible treatments include pain relievers, keeping the injured area from moving, rehabilitation, and sometimes surgery. For arthritis, injuries, or other diseases, you may need joint replacement surgery to remove the damaged joint and put in a new one.

NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases


[Learn More]