2021

  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. ›
  5. 2021 ICD-10-CM Diagnosis Code M79.A1

2021 ICD-10-CM Diagnosis Code M79.A1

Nontraumatic compartment syndrome of upper extremity

    2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
  • M79.A1 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2021 edition of ICD-10-CM M79.A1 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of M79.A1 - other international versions of ICD-10 M79.A1 may differ.
Applicable To
  • Nontraumatic compartment syndrome of shoulder, arm, forearm, wrist, hand, and fingers
The following code(s) above M79.A1 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.A1:
  • M00-M99
    2021 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 2021 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
  • M79.A
    ICD-10-CM Diagnosis Code M79.A

    Nontraumatic compartment syndrome

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Code First
    • , if applicable, associated postprocedural complication
    Type 1 Excludes
    • compartment syndrome NOS (T79.A-)
    • fibromyalgia (M79.7)
    • nontraumatic ischemic infarction of muscle (M62.2-)
    • traumatic compartment syndrome (T79.A-)
    Nontraumatic compartment syndrome
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
  • 2021 (effective 10/1/2020): No change

Diagnosis Index entries containing back-references to M79.A1:
  • Compartment syndrome (deep) (posterior) (traumatic) T79.A0
    ICD-10-CM Diagnosis Code T79.A0

    Compartment syndrome, unspecified

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Applicable To
    • Compartment syndrome NOS
    • nontraumatic
      • upper extremity M79.A1- (shoulder, arm, forearm, wrist, hand, fingers)
  • Syndrome - see also Disease
    • compartment (deep) (posterior) (traumatic) T79.A0
      ICD-10-CM Diagnosis Code T79.A0

      Compartment syndrome, unspecified

        2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
      Applicable To
      • Compartment syndrome NOS
      • nontraumatic
        • upper extremity M79.A1- (shoulder, arm, forearm, wrist, hand, fingers)

ICD-10-CM Codes Adjacent To M79.A1
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
M79.8 Other specified soft tissue disorders

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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