All ICD10 Codes

Q66

Non-Billable
ChapterQ00–Q99
Rankcategory
Description

Congenital deformities of feet

About ICD-10-CM code Q66

Under Q00-Q99 Congenital Malformations, Deformations and Chromosomal Abnormalities, within Congenital malformations and deformations of the musculoskeletal system (Q65-Q79), ICD-10-CM code Q66 describes Congenital deformities of feet. This code cannot be billed directly because more specific child codes exist beneath it.

Use a more specific code (1 billable, 9 non-billable)
Q66.0Congenital talipes equinovarushas subcodesQ66.1Congenital talipes calcaneovarushas subcodesQ66.2Congenital metatarsus (primus) varushas subcodesQ66.3Other congenital varus deformities of feethas subcodesQ66.4Congenital talipes calcaneovalgushas subcodesQ66.5Congenital pes planushas subcodesQ66.6Other congenital valgus deformities of feetQ66.7Congenital pes cavushas subcodesQ66.8Other congenital deformities of feethas subcodesQ66.9Congenital deformity of feet, unspecifiedhas subcodes
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 17: Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99).

CH17 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • inborn errors of metabolism (E70-E88)

Instructional Notes

Excludes1(Not coded here. Use a different code.)
  • reduction defects of feet (Q72.-)
  • valgus deformities (acquired) (M21.0-)
  • varus deformities (acquired) (M21.1-)

Clinical Hierarchy

BillableHas subcodes
CH17Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0)
Q65-Q79Congenital malformations and deformations of the musculoskeletal system (Q65-Q79)
Q66Congenital deformities of feetNot billable
Q66.0Congenital talipes equinovarusSubcodes
Q66.1Congenital talipes calcaneovarusSubcodes
Q66.2Congenital metatarsus (primus) varusSubcodes
Q66.3Other congenital varus deformities of feetSubcodes
Q66.4Congenital talipes calcaneovalgusSubcodes
Q66.5Congenital pes planusSubcodes
Q66.6Other congenital valgus deformities of feetBillable
Q66.7Congenital pes cavusSubcodes
Q66.8Other congenital deformities of feetSubcodes
Q66.9Congenital deformity of feet, unspecifiedSubcodes

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to Q66:

chapterCH17
Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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