2021

  1. ICD-10-CM Codes
    2. ›
  2. M00-M99 Diseases of the musculoskeletal system and connective tissue
    3. ›
  3. M65-M67 Disorders of synovium and tendon
    4. ›
  4. M66- Spontaneous rupture of synovium and tendon
    5. ›
  5. 2021 ICD-10-CM Diagnosis Code M66.821

2021 ICD-10-CM Diagnosis Code M66.821

Spontaneous rupture of other tendons, right upper arm

    2016 2017 2018 2019 2020 2021 Billable/Specific Code
  • M66.821 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2021 edition of ICD-10-CM M66.821 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of M66.821 - other international versions of ICD-10 M66.821 may differ.
The following code(s) above M66.821 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 M66.821:
  • 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
  • M66
    ICD-10-CM Diagnosis Code M66

    Spontaneous rupture of synovium and tendon

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Includes
    • rupture that occurs when a normal force is applied to tissues that are inferred to have less than normal strength
    Type 2 Excludes
    • rotator cuff syndrome (M75.1-)
    • rupture where an abnormal force is applied to normal tissue - see injury of tendon by body region
    Spontaneous rupture of synovium and tendon
Approximate Synonyms
  • Non-traumatic rupture of long head of biceps tendon of right shoulder
  • Non-traumatic rupture of triceps tendon of right upper limb
  • Nontraumatic tear of bilateral long head of biceps tendon
  • Nontraumatic tear of bilateral long head of biceps tendons
  • Nontraumatic tear of bilateral upper arm tendons
  • Nontraumatic tear of right long head of biceps tendon
  • Nontraumatic tear of right triceps tendon
  • Nontraumatic tear of right upper arm tendon
ICD-10-CM M66.821 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
  • 557 Tendonitis, myositis and bursitis with mcc
  • 558 Tendonitis, myositis and bursitis without mcc

Convert M66.821 to ICD-9-CM

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
ICD-10-CM Codes Adjacent To M66.821
M66.379 Spontaneous rupture of flexor tendons, unspecified ankle and foot
M66.38 …… other site
M66.39 …… multiple sites
M66.8 Spontaneous rupture of other tendons
M66.80 …… unspecified site
M66.81 Spontaneous rupture of other tendons, shoulder
M66.811 Spontaneous rupture of other tendons, right shoulder
M66.812 Spontaneous rupture of other tendons, left shoulder
M66.819 Spontaneous rupture of other tendons, unspecified shoulder
M66.82 Spontaneous rupture of other tendons, upper arm
M66.821 Spontaneous rupture of other tendons, right upper arm
M66.822 Spontaneous rupture of other tendons, left upper arm
M66.829 Spontaneous rupture of other tendons, unspecified upper arm
M66.83 Spontaneous rupture of other tendons, forearm
M66.831 Spontaneous rupture of other tendons, right forearm
M66.832 Spontaneous rupture of other tendons, left forearm
M66.839 Spontaneous rupture of other tendons, unspecified forearm
M66.84 Spontaneous rupture of other tendons, hand
M66.841 Spontaneous rupture of other tendons, right hand
M66.842 Spontaneous rupture of other tendons, left hand
M66.849 Spontaneous rupture of other tendons, unspecified hand

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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