2021

  1. ICD-10-CM Codes
    2. ›
  2. M00-M99 Diseases of the musculoskeletal system and connective tissue
    3. ›
  3. M05-M1A Inflammatory polyarthropathies
    4. ›
  4. M12- Other and unspecified arthropathy
    5. ›
  5. 2021 ICD-10-CM Diagnosis Code M12.26

2021 ICD-10-CM Diagnosis Code M12.26

Villonodular synovitis (pigmented), knee

    2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
  • M12.26 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 M12.26 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of M12.26 - other international versions of ICD-10 M12.26 may differ.
The following code(s) above M12.26 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 M12.26:
  • 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
  • M12
    ICD-10-CM Diagnosis Code M12

    Other and unspecified arthropathy

      2016 2017 2018 2019 2020 2021 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
  • 2021 (effective 10/1/2020): No change

Diagnosis Index entries containing back-references to M12.26:
  • Synovitis M65.9
    - see also Tenosynovitis
    ICD-10-CM Diagnosis Code M65.9

    Synovitis and tenosynovitis, unspecified

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    • villonodular (pigmented) M12.2-
      ICD-10-CM Diagnosis Code M12.2-

      Villonodular synovitis (pigmented)

        2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
      • knee M12.26-

ICD-10-CM Codes Adjacent To M12.26
M12.232 Villonodular synovitis (pigmented), left wrist
M12.239 Villonodular synovitis (pigmented), unspecified wrist
M12.24 Villonodular synovitis (pigmented), hand
M12.241 Villonodular synovitis (pigmented), right hand
M12.242 Villonodular synovitis (pigmented), left hand
M12.249 Villonodular synovitis (pigmented), unspecified hand
M12.25 Villonodular synovitis (pigmented), hip
M12.251 Villonodular synovitis (pigmented), right hip
M12.252 Villonodular synovitis (pigmented), left hip
M12.259 Villonodular synovitis (pigmented), unspecified hip
M12.26 Villonodular synovitis (pigmented), knee
M12.261 Villonodular synovitis (pigmented), right knee
M12.262 Villonodular synovitis (pigmented), left knee
M12.269 Villonodular synovitis (pigmented), unspecified knee
M12.27 Villonodular synovitis (pigmented), ankle and foot
M12.271 Villonodular synovitis (pigmented), right ankle and foot
M12.272 Villonodular synovitis (pigmented), left ankle and foot
M12.279 Villonodular synovitis (pigmented), unspecified ankle and foot
M12.28 …… other specified site
M12.29 …… multiple sites
M12.3 Palindromic rheumatism

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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