2019 ICD-10-CM Diagnosis Code M12

Other and unspecified arthropathy

    2016 2017 2018 2019 Non-Billable/Non-Specific Code
  • M12 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2019 edition of ICD-10-CM M12 became effective on October 1, 2018.
  • This is the American ICD-10-CM version of M12 - other international versions of ICD-10 M12 may differ.
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as M12. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • arthrosis (M15-M19
    ICD-10-CM Range M15-M19


    Type 2 Excludes
    • osteoarthritis of spine (M47.-)
    • M15 Polyosteoarthritis
    • M16 Osteoarthritis of hip
    • M17 Osteoarthritis of knee
    • M18 Osteoarthritis of first carpometacarpal ...
    • M19 Other and unspecified osteoarthritis
  • cricoarytenoid arthropathy (
    ICD-10-CM Diagnosis Code J38.7

    Other diseases of larynx

      2016 2017 2018 2019 Billable/Specific Code
    Applicable To
    • Abscess of larynx
    • Cellulitis of larynx
    • Disease of larynx NOS
    • Necrosis of larynx
    • Pachyderma of larynx
    • Perichondritis of larynx
    • Ulcer of larynx
The following code(s) above M12 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:
  • M00-M99
    2019 ICD-10-CM Range M00-M99

    Diseases of the musculoskeletal system and connective tissue

    • 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
ICD-10-CM Codes Adjacent To M12
M11.861 Other specified crystal arthropathies, right knee
M11.862 Other specified crystal arthropathies, left knee
M11.869 Other specified crystal arthropathies, unspecified knee
M11.87 Other specified crystal arthropathies, ankle and foot
M11.871 Other specified crystal arthropathies, right ankle and foot
M11.872 Other specified crystal arthropathies, left ankle and foot
M11.879 Other specified crystal arthropathies, unspecified ankle and foot
M11.88 …… vertebrae
M11.89 …… multiple sites
M11.9 Crystal arthropathy, unspecified
M12 Other and unspecified arthropathy
M12.0 Chronic postrheumatic arthropathy [Jaccoud]
M12.00 …… unspecified site
M12.01 Chronic postrheumatic arthropathy [Jaccoud], shoulder
M12.011 Chronic postrheumatic arthropathy [Jaccoud], right shoulder
M12.012 Chronic postrheumatic arthropathy [Jaccoud], left shoulder
M12.019 Chronic postrheumatic arthropathy [Jaccoud], unspecified shoulder
M12.02 Chronic postrheumatic arthropathy [Jaccoud], elbow
M12.021 Chronic postrheumatic arthropathy [Jaccoud], right elbow
M12.022 Chronic postrheumatic arthropathy [Jaccoud], left elbow
M12.029 Chronic postrheumatic arthropathy [Jaccoud], unspecified elbow

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