2020 ICD-10-CM Diagnosis Code M66

Spontaneous rupture of synovium and tendon

    2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
  • M66 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 M66 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of M66 - other international versions of ICD-10 M66 may differ.
Type 2 Excludes
Type 2 Excludes Help
A type 2 excludes note represents "not included here". A type 2 excludes note indicates that the condition excluded is not part of the condition it is excluded from but a patient may have both conditions at the same time. When a type 2 excludes note appears under a code it is acceptable to use both the code (M66) and the excluded code together.
  • rotator cuff syndrome (
    ICD-10-CM Diagnosis Code M75.1

    Rotator cuff tear or rupture, not specified as traumatic

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Applicable To
    • Rotator cuff syndrome
    • Supraspinatus tear or rupture, not specified as traumatic
    • Supraspinatus syndrome
    Type 1 Excludes
    • tear of rotator cuff, traumatic (S46.01-)
    M75.1-
    )
  • rupture where an abnormal force is applied to normal tissue - see injury of tendon by body region
Includes
Includes Help
"Includes" further defines, or give examples of, the content of the code or category.
  • rupture that occurs when a normal force is applied to tissues that are inferred to have less than normal strength
The following code(s) above M66 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 M66:
  • 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
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 M66:
  • Type 2 Excludes: M62.1
    ICD-10-CM Diagnosis Code M62.1

    Other rupture of muscle (nontraumatic)

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • traumatic rupture of muscle - see strain of muscle by body region
    Type 2 Excludes
    • rupture of tendon (M66.-)
ICD-10-CM Codes Adjacent To M66
M65.861 Other synovitis and tenosynovitis, right lower leg
M65.862 Other synovitis and tenosynovitis, left lower leg
M65.869 Other synovitis and tenosynovitis, unspecified lower leg
M65.87 Other synovitis and tenosynovitis, ankle and foot
M65.871 Other synovitis and tenosynovitis, right ankle and foot
M65.872 Other synovitis and tenosynovitis, left ankle and foot
M65.879 Other synovitis and tenosynovitis, unspecified ankle and foot
M65.88 …… other site
M65.89 …… multiple sites
M65.9 Synovitis and tenosynovitis, unspecified
M66 Spontaneous rupture of synovium and tendon
M66.0 Rupture of popliteal cyst
M66.1 Rupture of synovium
M66.10 …… unspecified joint
M66.11 Rupture of synovium, shoulder
M66.111 Rupture of synovium, right shoulder
M66.112 Rupture of synovium, left shoulder
M66.119 Rupture of synovium, unspecified shoulder
M66.12 Rupture of synovium, elbow
M66.121 Rupture of synovium, right elbow
M66.122 Rupture of synovium, left elbow

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