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ICD-10-CM 2027

ICD-10 code for Hollow foot

Q66.7

Congenital pes cavus

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Hollow foot (congenital)”. Page updated September 29, 2026.

About coding Hollow foot

The ICD-10-CM code for Hollow foot is Q66.7 (Congenital pes cavus).

Within Q66 (congenital deformities of feet), Q66.7 is specifically for congenital pes cavus. Related codes cover congenital talipes equinovarus (Q66.0), congenital talipes calcaneovarus (Q66.1), congenital metatarsus (primus) varus (Q66.2), other congenital varus deformities of feet (Q66.3), congenital talipes calcaneovalgus (Q66.4), congenital pes planus (Q66.5), other congenital valgus deformities of feet (Q66.6), other congenital deformities of feet (Q66.8) and 1 more.

To report this condition, pick the subcode that matches the documentation: Q66.70 (unspecified foot), Q66.71 (right foot) and Q66.72 (left foot).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015, and changed in FY2020 (expanded into subcodes).

More specific Hollow foot codes (official index)

  • acquired

Common questions about Hollow foot ICD-10 codes

What is the ICD-10 code for Hollow foot?

Q66.7 — Congenital pes cavus (a header code; report a more specific subcode).

Is Q66.7 billable?

No. Q66.7 is a header code. Report one of its more specific subcodes instead.