Q66
⚠ Non-billable
Congenital deformities of feet
ICD-10-CM · FY2026 · Congenital Malformations, Deformations and Chromosomal Abnormalities
Code
Q66
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Congenital Malformations, Deformations and Chromosomal Abnormalities
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code Q66?
ICD-10-CM code Q66 represents Congenital deformities of feet. It is a non-billable header code requiring a more specific subcategory in the Congenital Malformations, Deformations and Chromosomal Abnormalities chapter, effective October 1, 2025 – September 30, 2026.
Is Q66 billable?
No. Q66 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is Q66 in?
Q66 belongs to the Congenital Malformations, Deformations and Chromosomal Abnormalities chapter (Q00–Q99) of ICD-10-CM.
Related codes in the Q66 category
Q66.0
Congenital talipes equinovarus
Non-billable
Q66.1
Congenital talipes calcaneovarus
Non-billable
Q66.2
Congenital metatarsus (primus) varus
Non-billable
Q66.3
Other congenital varus deformities of feet
Non-billable
Q66.4
Congenital talipes calcaneovalgus
Non-billable
Q66.5
Congenital pes planus
Non-billable
Q66.6
Other congenital valgus deformities of feet
Billable
Q66.7
Congenital pes cavus
Non-billable
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