2020 ICD-10-CM Diagnosis Code M12.21

Villonodular synovitis (pigmented), shoulder

    2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
  • M12.21 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 M12.21 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of M12.21 - other international versions of ICD-10 M12.21 may differ.
The following code(s) above M12.21 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 M12.21:
  • 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
  • M12
    ICD-10-CM Diagnosis Code M12

    Other and unspecified arthropathy

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    Other and unspecified arthropathy
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

Diagnosis Index entries containing back-references to M12.21:
  • Synovitis M65.9
    - see also Tenosynovitis
    ICD-10-CM Diagnosis Code M65.9

    Synovitis and tenosynovitis, unspecified

      2016 2017 2018 2019 2020 Billable/Specific Code
    • villonodular (pigmented) M12.2-
      ICD-10-CM Diagnosis Code M12.2-

      Villonodular synovitis (pigmented)

        2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
      • shoulder M12.21-

ICD-10-CM Codes Adjacent To M12.21
M12.162 Kaschin-Beck disease, left knee
M12.169 Kaschin-Beck disease, unspecified knee
M12.17 Kaschin-Beck disease, ankle and foot
M12.171 Kaschin-Beck disease, right ankle and foot
M12.172 Kaschin-Beck disease, left ankle and foot
M12.179 Kaschin-Beck disease, unspecified ankle and foot
M12.18 …… vertebrae
M12.19 …… multiple sites
M12.2 Villonodular synovitis (pigmented)
M12.20 …… unspecified site
M12.21 Villonodular synovitis (pigmented), shoulder
M12.211 Villonodular synovitis (pigmented), right shoulder
M12.212 Villonodular synovitis (pigmented), left shoulder
M12.219 Villonodular synovitis (pigmented), unspecified shoulder
M12.22 Villonodular synovitis (pigmented), elbow
M12.221 Villonodular synovitis (pigmented), right elbow
M12.222 Villonodular synovitis (pigmented), left elbow
M12.229 Villonodular synovitis (pigmented), unspecified elbow
M12.23 Villonodular synovitis (pigmented), wrist
M12.231 Villonodular synovitis (pigmented), right wrist
M12.232 Villonodular synovitis (pigmented), left wrist

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