ICD-10-CM Code M79.A

Nontraumatic compartment syndrome

Version 2020 Non-Billable Code

Not Valid for Submission

M79.A is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of nontraumatic compartment syndrome. The code is NOT valid for the year 2020 for the submission of HIPAA-covered transactions.

ICD-10:M79.A
Short Description:Nontraumatic compartment syndrome
Long Description:Nontraumatic compartment syndrome

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

  • 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.A:

Code First

Code First
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
  • , if applicable, associated postprocedural complication

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.
  • compartment syndrome NOS T79.A
  • fibromyalgia M79.7
  • nontraumatic ischemic infarction of muscle M62.2
  • traumatic compartment syndrome T79.A

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


Arm Injuries and Disorders

Of the 206 bones in your body, three of them are in your arm: the humerus, radius, and ulna. Your arms are also made up of muscles, joints, tendons, and other connective tissue. Injuries to any of these parts of the arm can occur during sports, a fall, or an accident.

Types of arm injuries include

  • Tendinitis and bursitis
  • Sprains
  • Dislocations
  • Broken bones
  • Nerve problems
  • Osteoarthritis

You may also have problems or injure specific parts of your arm, such as your hand, wrist, elbow, or shoulder.


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Leg Injuries and Disorders

Your legs are made up of bones, blood vessels, muscles, and other connective tissue. They are important for motion and standing. Playing sports, running, falling, or having an accident can damage your legs. Common leg injuries include sprains and strains, joint dislocations, and fractures.

These injuries can affect the entire leg, or just the foot, ankle, knee, or hip. Certain diseases also lead to leg problems. For example, knee osteoarthritis, common in older people, can cause pain and limited motion. Problems in your veins in your legs can lead to varicose veins or deep vein thrombosis.


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Muscle Disorders

Your muscles help you move and help your body work. Different types of muscles have different jobs. There are many problems that can affect muscles. Muscle disorders can cause weakness, pain or even paralysis.

Causes of muscle disorders include

  • Injury or overuse, such as sprains or strains, cramps or tendinitis
  • A genetic disorder, such as muscular dystrophy
  • Some cancers
  • Inflammation, such as myositis
  • Diseases of nerves that affect muscles
  • Infections
  • Certain medicines

Sometimes the cause is not known.


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