Congenital pes cavus, unspecified foot

This code describes a congenital foot deformity characterized by an abnormally high arch that does not flatten with weight-bearing, without further specification of the affected foot. This structural anomaly can lead to altered biomechanics, pain, and difficulty with ambulation.

Apply this code when documentation indicates a patient has a pes cavus deformity present at birth, and the specific foot (left or right) is not documented. This code is appropriate for initial evaluations, follow-up care, or surgical planning for congenital high arch foot.

• Do not use this code if the laterality (left or right foot) is specified; instead, use Q66.71 or Q66.72.
• Distinguish from acquired pes cavus, which would be coded with M21.6X.
• Ensure documentation clearly states the congenital nature of the deformity to support this code.