2021 ICD-10-CM Diagnosis Code M91.20

Coxa plana, unspecified hip

    2016 2017 2018 2019 2020 2021 Billable/Specific Code
  • M91.20 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2021 edition of ICD-10-CM M91.20 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of M91.20 - other international versions of ICD-10 M91.20 may differ.
The following code(s) above M91.20 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 M91.20:
  • 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
  • M91-M94
    2021 ICD-10-CM Range M91-M94

    Chondropathies

    Type 1 Excludes
    • postprocedural chondropathies (M96.-)
    Chondropathies
  • M91
    ICD-10-CM Diagnosis Code M91

    Juvenile osteochondrosis of hip and pelvis

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • slipped upper femoral epiphysis (nontraumatic) (M93.0)
    Juvenile osteochondrosis of hip and pelvis
  • M91.2
    ICD-10-CM Diagnosis Code M91.2

    Coxa plana

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Applicable To
    • Hip deformity due to previous juvenile osteochondrosis
    Coxa plana
ICD-10-CM M91.20 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
  • 553 Bone diseases and arthropathies with mcc
  • 554 Bone diseases and arthropathies without mcc

Convert M91.20 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
  • 2021 (effective 10/1/2020): No change
ICD-10-CM Codes Adjacent To M91.20
M90.879 Osteopathy in diseases classified elsewhere, unspecified ankle and foot
M90.88 …… other site
M90.89 …… multiple sites
M91 Juvenile osteochondrosis of hip and pelvis
M91.0 Juvenile osteochondrosis of pelvis
M91.1 Juvenile osteochondrosis of head of femur [Legg-Calvé-Perthes]
M91.10 …… unspecified leg
M91.11 …… right leg
M91.12 …… left leg
M91.2 Coxa plana
M91.20 …… unspecified hip
M91.21 …… right hip
M91.22 …… left hip
M91.3 Pseudocoxalgia
M91.30 …… unspecified hip
M91.31 …… right hip
M91.32 …… left hip
M91.4 Coxa magna
M91.40 …… unspecified hip
M91.41 …… right hip
M91.42 …… left hip

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