2020 ICD-10-CM Diagnosis Code M79.A

Nontraumatic compartment syndrome

    2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
  • M79.A 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.A became effective on October 1, 2019.
  • This is the American ICD-10-CM version of M79.A - other international versions of ICD-10 M79.A may differ.
Code First
Code First Help
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, 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. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.
  • , if applicable, associated postprocedural complication
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.A. 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.
  • compartment syndrome NOS (
    ICD-10-CM Diagnosis Code T79.A

    Traumatic compartment syndrome

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • fibromyalgia (M79.7)
    • nontraumatic compartment syndrome (M79.A-)
    Type 2 Excludes
    • traumatic ischemic infarction of muscle (T79.6)
    T79.A-
    )
  • fibromyalgia (
    ICD-10-CM Diagnosis Code M79.7

    Fibromyalgia

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Fibromyositis
    • Fibrositis
    • Myofibrositis
    M79.7
    )
  • nontraumatic ischemic infarction of muscle (
    ICD-10-CM Diagnosis Code M62.2

    Nontraumatic ischemic infarction of muscle

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • compartment syndrome (traumatic) (T79.A-)
    • nontraumatic compartment syndrome (M79.A-)
    • traumatic ischemia of muscle (T79.6)
    • rhabdomyolysis (M62.82)
    • Volkmann's ischemic contracture (T79.6)
    M62.2-
    )
  • traumatic compartment syndrome (
    ICD-10-CM Diagnosis Code T79.A

    Traumatic compartment syndrome

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • fibromyalgia (M79.7)
    • nontraumatic compartment syndrome (M79.A-)
    Type 2 Excludes
    • traumatic ischemic infarction of muscle (T79.6)
    T79.A-
    )
The following code(s) above M79.A 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.A:
  • 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
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
Code annotations containing back-references to M79.A:
  • Type 1 Excludes: M62.2
    , T79.A
    ICD-10-CM Diagnosis Code M62.2

    Nontraumatic ischemic infarction of muscle

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • compartment syndrome (traumatic) (T79.A-)
    • nontraumatic compartment syndrome (M79.A-)
    • traumatic ischemia of muscle (T79.6)
    • rhabdomyolysis (M62.82)
    • Volkmann's ischemic contracture (T79.6)
    ICD-10-CM Diagnosis Code T79.A

    Traumatic compartment syndrome

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • fibromyalgia (M79.7)
    • nontraumatic compartment syndrome (M79.A-)
    Type 2 Excludes
    • traumatic ischemic infarction of muscle (T79.6)
ICD-10-CM Codes Adjacent To M79.A
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.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 …… of abdomen
M79.A9 …… of other sites

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