Q66.5Congenital pes planus

Q66.5 is the ICD-10-CM diagnosis code for congenital pes planus. It belongs to category Q66 (congenital deformities of feet), block Q65-Q79 (congenital malformations and deformations of the musculoskeletal system) and chapter 17 (congenital malformations, deformations, chromosomal abnormalities, and genetic disorders). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within Q66 (congenital deformities of feet), Q66.5 is specifically for congenital pes planus. 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), other congenital valgus deformities of feet (Q66.6), congenital pes cavus (Q66.7), other congenital deformities of feet (Q66.8) and 1 more.

To report this condition, pick the subcode that matches the documentation: Q66.50 (unspecified foot), Q66.51 (right foot) and Q66.52 (left foot).

Don't report Q66.5 together with the conditions in its Excludes1 note: pes planus, acquired (M21.4).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.