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ICD-10-CM 2027 diagnosis code

Q66.22Congenital metatarsus adductus

Not billable — use a more specific code

Q66.22 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it.

Code last changed in FY2020 (effective October 1, 2019). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About Q66.22

Q66.22 is the ICD-10-CM diagnosis code for congenital metatarsus adductus. It belongs to category Q66 (congenital deformities of feet), block Q65-Q79 (congenital malformations and deformations of the musculoskeletal system) and chapter 17 (congenital malformations, deformations, chromosomal abnormalities, and genetic disorders). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within Q66.2 (congenital metatarsus (primus) varus), Q66.22 is specifically for congenital metatarsus adductus. Related codes cover primus varus (Q66.21).

To report this condition, pick the subcode that matches the documentation: Q66.221 (right foot), Q66.222 (left foot) and Q66.229 (unspecified foot).

It was added in FY2017, effective October 1, 2016, and changed in FY2020.

Before ICD-10, this condition was coded in ICD-9-CM as 754.53 (metatarsus varus).

Specific codes under Q66.22

Coding notes

Applicable toConditions and synonyms classified to this code
  • Congenital metatarsus varus

Notes that apply from higher levels

Instructions written at a parent level also apply to Q66.22.

› From Q66 Congenital deformities of feet
Excludes1
  • reduction defects of feet (Q72.-)
  • valgus deformities (acquired) (M21.0-)
  • varus deformities (acquired) (M21.1-)

Broader instructions also apply from Chapter 17: Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders.

Alphabetic index entries

2 entries

Terms in the official ICD-10-CM index that lead to Q66.22.

Codes whose notes reference Q66.22

ICD-9-CM equivalent

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From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2017 (effective 10/1/2016): Added
  • FY2020 (effective 10/1/2019): Expanded — no longer billable

Common questions about Q66.22

Is Q66.22 billable?

No. Q66.22 is a header code. Report one of its more specific subcodes instead.

What is the ICD-9 code for Q66.22?

The CMS General Equivalence Mappings map Q66.22 to ICD-9-CM 754.53.