2021 ICD-10-CM Diagnosis Code Q66.2

Congenital metatarsus (primus) varus

    2016 2017 - Converted to Parent Code 2018 2019 2020 2021 Non-Billable/Non-Specific Code
  • Q66.2 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2021 edition of ICD-10-CM Q66.2 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of Q66.2 - other international versions of ICD-10 Q66.2 may differ.
The following code(s) above Q66.2 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 Q66.2:
  • Q00-Q99
    2021 ICD-10-CM Range Q00-Q99

    Congenital malformations, deformations and chromosomal abnormalities

    • 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 2021 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
  • Congenital bilateral metatarsus adductus
  • Congenital left metatarsus adductus
  • Congenital metatarsus adductus, both sides
  • Congenital right metatarsus adductus
  • Left metatarsus primus varus
  • Left metatarsus varus
  • Metatarsus abductus
  • Metatarsus adductus
  • Metatarsus primus varus
  • Metatarsus varus
  • Right metatarsus primus varus
  • Right metatarsus varus
Clinical Information
  • Angulation of the first metatarsal bone towards the midline. This is associated with angulation of the phalanges of the same toe away from the midline (hallux valgus).
Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): Deleted code
  • 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): No change
  • 2021 (effective 10/1/2020): No change
ICD-10-CM Codes Adjacent To Q66.2
Q65.9 Congenital deformity of hip, unspecified
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

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