Q66 — Congenital deformities of feet
Is Q66 billable?
No — Q66 is a non-billable header code. Q66 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 32 billable codes beneath Q66.
Billable codes under this header
- Q66.6Other congenital valgus deformities of feet
- Q66.00Congenital talipes equinovarus, unspecified foot
- Q66.01Congenital talipes equinovarus, right foot
- Q66.02Congenital talipes equinovarus, left foot
- Q66.10Congenital talipes calcaneovarus, unspecified foot
- Q66.11Congenital talipes calcaneovarus, right foot
- Q66.12Congenital talipes calcaneovarus, left foot
- Q66.30Other congenital varus deformities of feet, unspecified foot
- Q66.31Other congenital varus deformities of feet, right foot
- Q66.32Other congenital varus deformities of feet, left foot
- Q66.40Congenital talipes calcaneovalgus, unspecified foot
- Q66.41Congenital talipes calcaneovalgus, right foot
- Q66.42Congenital talipes calcaneovalgus, left foot
- Q66.50Congenital pes planus, unspecified foot
- Q66.51Congenital pes planus, right foot
- Q66.52Congenital pes planus, left foot
- Q66.70Congenital pes cavus, unspecified foot
- Q66.71Congenital pes cavus, right foot
- Q66.72Congenital pes cavus, left foot
- Q66.80Congenital vertical talus deformity, unspecified foot
- Q66.81Congenital vertical talus deformity, right foot
- Q66.82Congenital vertical talus deformity, left foot
- Q66.89Other specified congenital deformities of feet
- Q66.90Congenital deformity of feet, unspecified, unspecified foot
- Q66.91Congenital deformity of feet, unspecified, right foot
- Q66.92Congenital deformity of feet, unspecified, left foot
- Q66.211Congenital metatarsus primus varus, right foot
- Q66.212Congenital metatarsus primus varus, left foot
- Q66.219Congenital metatarsus primus varus, unspecified foot
- Q66.221Congenital metatarsus adductus, right foot
- Q66.222Congenital metatarsus adductus, left foot
- Q66.229Congenital metatarsus adductus, unspecified foot
Q66 at a glance
| Code | Q66 |
|---|---|
| Description | Congenital deformities of feet |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes1 — never code together
The conditions below can never be reported together with Q66 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes2 — not included here — inherited from Chapter 17
The conditions below are not part of Q66, but a patient may have both at the same time. When documentation supports it, Q66 and the excluded code may both be reported.
- inborn errors of metabolism (E70-E88)
What codes fall under Q66? (10)
- Q66.0Congenital talipes equinovarusnot billable
- Q66.1Congenital talipes calcaneovarusnot billable
- Q66.2Congenital metatarsus (primus) varusnot billable
- Q66.3Other congenital varus deformities of feetnot billable
- Q66.4Congenital talipes calcaneovalgusnot billable
- Q66.5Congenital pes planusnot billable
- Q66.6Other congenital valgus deformities of feet
- Q66.7Congenital pes cavusnot billable
- Q66.8Other congenital deformities of feetnot billable
- Q66.9Congenital deformity of feet, unspecifiednot billable
How long has Q66 existed?
Q66 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with Q66?
ICD-10-CM declares these codes mutually exclusive with Q66 — exactly one of each pair can be correct for a given encounter.