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Q66

Non-billable

Congenital deformities of feet

Q66 is the ICD-10-CM code for Congenital deformities of feet. It is a non-billable category code — use a more specific child code such as Q66.0 for billing.

Status
Header (non-billable)
Chapter
Q00-Q99
Subcodes
10
Edition
FY2026

Q00-Q99 Congenital malformations, deformations and chromosomal abnormalities

Excludes1 — not coded here

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

Frequently asked questions

What is ICD-10 code Q66?
Q66 is the ICD-10-CM code for "Congenital deformities of feet". It falls under Q00-Q99 Congenital malformations, deformations and chromosomal abnormalities.
Is Q66 a billable code?
No — Q66 is a non-billable header code. Use a more specific child code (such as Q66.0) for billing.
What are the subcodes of Q66?
Q66 has 10 more specific child codes, including Q66.0, Q66.1, Q66.2.
What is excluded from Q66?
Excludes1 (not coded here): reduction defects of feet (Q72.-); valgus deformities (acquired) (M21.0-); varus deformities (acquired) (M21.1-).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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