2020 ICD-10-CM Diagnosis Code M85.021

Fibrous dysplasia (monostotic), right upper arm

    2016 2017 2018 2019 2020 Billable/Specific Code
  • M85.021 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 M85.021 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of M85.021 - other international versions of ICD-10 M85.021 may differ.
The following code(s) above M85.021 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 M85.021:
  • 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
  • M85
    ICD-10-CM Diagnosis Code M85

    Other disorders of bone density and structure

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • osteogenesis imperfecta (Q78.0)
    • osteopetrosis (Q78.2)
    • osteopoikilosis (Q78.8)
    • polyostotic fibrous dysplasia (Q78.1)
    Other disorders of bone density and structure
  • M85.0
    ICD-10-CM Diagnosis Code M85.0

    Fibrous dysplasia (monostotic)

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 2 Excludes
    • fibrous dysplasia of jaw (M27.8)
    Fibrous dysplasia (monostotic)
Approximate Synonyms
  • Monostotic fibrous dysplasia of bilateral upper arms
  • Monostotic fibrous dysplasia of right upper arm
ICD-10-CM M85.021 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 M85.021 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
ICD-10-CM Codes Adjacent To M85.021
M84.88 …… other site
M84.9 Disorder of continuity of bone, unspecified
M85 Other disorders of bone density and structure
M85.0 Fibrous dysplasia (monostotic)
M85.00 …… unspecified site
M85.01 Fibrous dysplasia (monostotic), shoulder
M85.011 Fibrous dysplasia (monostotic), right shoulder
M85.012 Fibrous dysplasia (monostotic), left shoulder
M85.019 Fibrous dysplasia (monostotic), unspecified shoulder
M85.02 Fibrous dysplasia (monostotic), upper arm
M85.021 Fibrous dysplasia (monostotic), right upper arm
M85.022 Fibrous dysplasia (monostotic), left upper arm
M85.029 Fibrous dysplasia (monostotic), unspecified upper arm
M85.03 Fibrous dysplasia (monostotic), forearm
M85.031 Fibrous dysplasia (monostotic), right forearm
M85.032 Fibrous dysplasia (monostotic), left forearm
M85.039 Fibrous dysplasia (monostotic), unspecified forearm
M85.04 Fibrous dysplasia (monostotic), hand
M85.041 Fibrous dysplasia (monostotic), right hand
M85.042 Fibrous dysplasia (monostotic), left hand
M85.049 Fibrous dysplasia (monostotic), unspecified hand

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