U.S. ICD-10-CM · FY 2027

Q66 ICD-10-CM Code: Congenital deformities of feet

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

Q66

Congenital deformities of feet

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where Q66 sits

  1. 1

    Chapter 17

    Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1)

  2. 2

    Section

    Congenital malformations and deformations of the musculoskeletal system (Q65-Q79)

  3. 3

    Category Q66

    Congenital deformities of feet

  4. 4

    Code Q66

    Congenital deformities of feet

More specific choices

Codes under Q66

Q66 is a non-billable category. Choose the child code that best matches the documented diagnosis.

Q66.0

Congenital talipes equinovarus

Q66.1

Congenital talipes calcaneovarus

Q66.2

Congenital metatarsus (primus) varus

Q66.3

Other congenital varus deformities of feet

Q66.4

Congenital talipes calcaneovalgus

Q66.5

Congenital pes planus

Q66.6

Other congenital valgus deformities of feet

Q66.7

Congenital pes cavus

Q66.8

Other congenital deformities of feet

Q66.9

Congenital deformity of feet, unspecified

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for Q66.

Code first

No “code first” instruction is listed for Q66.

Use additional code

No “use additional code” instruction is listed for Q66.

Excludes1

Conditions that should not be reported together with this code.

  • reduction defects of feet (Q72.-)
  • valgus deformities (acquired) (M21.0-)
  • varus deformities (acquired) (M21.1-)

Excludes2

Conditions not included here that may be reported separately when present.

No Excludes2 note is listed for Q66.

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

Publisher

Vero Scribe Inc.

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code Q66 mean?

Q66 is the FY 2027 U.S. ICD-10-CM code for “Congenital deformities of feet.”

Is Q66 a billable or specific ICD-10-CM code?

No. Q66 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is Q66 located in ICD-10-CM?

Q66 is listed in Chapter 17, Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1), within Congenital malformations and deformations of the musculoskeletal system (Q65-Q79) (Q65–Q79), under category Q66, Congenital deformities of feet.

What coding notes are listed for Q66?

No inclusion terms are listed for Q66 in this reference record. No code-first instruction is listed. Excludes1 notes: reduction defects of feet (Q72.-); valgus deformities (acquired) (M21.0-); varus deformities (acquired) (M21.1-). No Excludes2 note is listed.

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