2020 ICD-10-CM Diagnosis Code Q66.21

Congenital metatarsus primus varus

    2017 - New Code 2018 2019 2020 - Converted to Parent Code Non-Billable/Non-Specific Code
  • Q66.21 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • ICD-10-CM Q66.21 is a new 2020 ICD-10-CM code that became effective on October 1, 2019.
  • This is the American ICD-10-CM version of Q66.21 - other international versions of ICD-10 Q66.21 may differ.
The following code(s) above Q66.21 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 Q66.21:
  • Q00-Q99
    2020 ICD-10-CM Range Q00-Q99

    Congenital malformations, deformations and chromosomal abnormalities

    Note
    • Codes from this chapter are not for use on maternal records
    Type 2 Excludes
    • inborn errors of metabolism (E70-E88)
    Congenital malformations, deformations and chromosomal abnormalities
  • Q66
    ICD-10-CM Diagnosis Code Q66

    Congenital deformities of feet

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • reduction defects of feet (Q72.-)
    • valgus deformities (acquired) (M21.0-)
    • varus deformities (acquired) (M21.1-)
    Congenital deformities of feet
Approximate Synonyms
  • Bilateral metatarsus primus varus
  • Bilateral metatarsus varus
  • Left metatarsus primus varus
  • Left metatarsus varus
  • Right metatarsus primus varus
  • Right metatarsus varus
Code History
  • 2017 (effective 10/1/2016): New code
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): Deleted code
  • 2020 (effective 10/1/2019): New code

Diagnosis Index entries containing back-references to Q66.21:
  • Metatarsus, metatarsal - see also condition
    • varus (congenital) Q66.22-
      ICD-10-CM Diagnosis Code Q66.22-

      Congenital metatarsus adductus

        2017 - New Code 2018 2019 2020 - Converted to Parent Code Non-Billable/Non-Specific Code
      Applicable To
      • Congenital metatarsus varus
      • primus Q66.21-
  • Primus varus Q66.21-

ICD-10-CM Codes Adjacent To Q66.21
Q66 Congenital deformities of feet
Q66.0 Congenital talipes equinovarus
Q66.00 …… unspecified foot
Q66.01 …… right foot
Q66.02 …… left foot
Q66.1 Congenital talipes calcaneovarus
Q66.10 …… unspecified foot
Q66.11 …… right foot
Q66.12 …… left foot
Q66.2 Congenital metatarsus (primus) varus
Q66.21 Congenital metatarsus primus varus
Q66.211 …… right foot
Q66.212 …… left foot
Q66.219 …… unspecified foot
Q66.22 Congenital metatarsus adductus
Q66.221 …… right foot
Q66.222 …… left foot
Q66.229 …… unspecified foot
Q66.3 Other congenital varus deformities of feet
Q66.30 …… unspecified foot
Q66.31 …… right foot

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