Q66.91 – Congenital deformity of feet, unspecified, right foot

ICD-10-CM 2027 diagnosis code · Congenital malformations and deformations of the musculoskeletal system

Billable code

ICD-10-CM code Q66.91
Code
Q66.91 (claims format: Q6691)
Description
Congenital deformity of feet, unspecified, right foot
Billable
Yes – valid for HIPAA-covered transactions
Valid for
Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter
17. Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1)
Block
Q65-Q79 Congenital malformations and deformations of the musculoskeletal system
Parent codes
Q66 › Q66.9

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Q66 – Congenital deformities of feet

Excludes1 (not coded here):
  • reduction defects of feet (Q72.-)
  • valgus deformities (acquired) (M21.0-)
  • varus deformities (acquired) (M21.1-)

Related codes in Q66.9

Frequently asked questions

What is ICD-10 code Q66.91?

Q66.91 is the ICD-10-CM code for congenital deformity of feet, unspecified, right foot, in the block Q65-Q79 (Congenital malformations and deformations of the musculoskeletal system).

Is Q66.91 a billable code?

Yes. Q66.91 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does Q66.91 belong to?

It belongs to category Q66 – Congenital deformities of feet.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.