2020 ICD-10-CM Diagnosis Code M11.9

Crystal arthropathy, unspecified

    2016 2017 2018 2019 2020 Billable/Specific Code
  • M11.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2020 edition of ICD-10-CM M11.9 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of M11.9 - other international versions of ICD-10 M11.9 may differ.
The following code(s) above M11.9 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 M11.9:
  • M00-M99
    2020 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
Approximate Synonyms
  • Crystal arthritis
  • Crystal arthritis of ankle
  • Crystal arthritis of elbow
  • Crystal arthritis of foot
  • Crystal arthritis of hip
  • Crystal arthritis of knee
  • Crystal arthropathy
  • Crystal arthropathy of ankle
  • Crystal arthropathy of elbow
  • Crystal arthropathy of foot
  • Crystal arthropathy of hand
  • Crystal arthropathy of hip
  • Crystal arthropathy of knee
  • Crystal arthropathy of shoulder region
  • Crystal arthropathy of wrist
  • Crystal unspecified, arthritis of forearm
  • Crystal unspecified, arthritis of hand
  • Crystal unspecified, arthritis of shoulder
ICD-10-CM M11.9 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 553 Bone diseases and arthropathies with mcc
  • 554 Bone diseases and arthropathies without mcc

Convert M11.9 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

Diagnosis Index entries containing back-references to M11.9:
  • Arthritis, arthritic (acute) (chronic) (nonpyogenic) (subacute) M19.90
    ICD-10-CM Diagnosis Code M19.90

    Unspecified osteoarthritis, unspecified site

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Arthrosis NOS
    • Arthritis NOS
    • Osteoarthritis NOS

ICD-10-CM Codes Adjacent To M11.9
M11.86 Other specified crystal arthropathies, knee
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

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