2020 ICD-10-CM Diagnosis Code M21.6X9

Other acquired deformities of unspecified foot

    2016 2017 2018 2019 2020 Billable/Specific Code
  • M21.6X9 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 M21.6X9 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of M21.6X9 - other international versions of ICD-10 M21.6X9 may differ.
The following code(s) above M21.6X9 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 M21.6X9:
  • M00-M99
    2020 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
  • M20-M25
    2020 ICD-10-CM Range M20-M25

    Other joint disorders

    Type 2 Excludes
    Other joint disorders
  • M21
    ICD-10-CM Diagnosis Code M21

    Other acquired deformities of limbs

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • acquired absence of limb (Z89.-)
    • congenital absence of limbs (Q71-Q73)
    • congenital deformities and malformations of limbs (Q65-Q66, Q68-Q74)
    Type 2 Excludes
    • acquired deformities of fingers or toes (M20.-)
    • coxa plana (M91.2)
    Other acquired deformities of limbs
  • M21.6
    ICD-10-CM Diagnosis Code M21.6

    Other acquired deformities of foot

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 2 Excludes
    Other acquired deformities of foot
Approximate Synonyms
  • Acquired cavovarus deformity of foot
  • Acquired cavus deformity of foot
  • Acquired metatarsus adductus
  • Deformity of foot due to rheumatoid arthritis
  • Deformity of foot, cavovarus, acquired
  • Deformity of foot, cavus, acquired
  • Deformity of foot, equinus
  • Disorder of ankle
  • Foot drop
  • Plantarflexion deformity of foot
  • Rheumatoid foot deformity
ICD-10-CM M21.6X9 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 564 Other musculoskeletal system and connective tissue diagnoses with mcc
  • 565 Other musculoskeletal system and connective tissue diagnoses with cc
  • 566 Other musculoskeletal system and connective tissue diagnoses without cc/mcc

Convert M21.6X9 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 M21.6X9
M21.611 …… of right foot
M21.612 …… of left foot
M21.619 …… of unspecified foot
M21.62 Bunionette
M21.621 …… of right foot
M21.622 …… of left foot
M21.629 …… of unspecified foot
M21.6X Other acquired deformities of foot
M21.6X1 Other acquired deformities of right foot
M21.6X2 Other acquired deformities of left foot
M21.6X9 Other acquired deformities of unspecified foot
M21.7 Unequal limb length (acquired)
M21.70 …… unspecified site
M21.72 Unequal limb length (acquired), humerus
M21.721 Unequal limb length (acquired), right humerus
M21.722 Unequal limb length (acquired), left humerus
M21.729 Unequal limb length (acquired), unspecified humerus
M21.73 Unequal limb length (acquired), ulna and radius
M21.731 Unequal limb length (acquired), right ulna
M21.732 Unequal limb length (acquired), left ulna
M21.733 Unequal limb length (acquired), right radius

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