Orthopedic Coding Alert

Question: What is the correct diagnosis for "periostitis secondary to enlarged plantar condyle of fifth metatarsal"?

North Carolina Subscriber

Answer: The correct choice is 730.37 (Periostitis without mention of osteomyelitis;ankle and foot). You would choose a different fifth digit for periostitis in other regions.

Definition: Periostitis is inflammation of the periosteum in which the membrane may become detached from the underlying bone. Patients usually develop periostitis because of overuse and severe strain at the tendon insertions where the muscle fibers or tendons pull, stretch, or tear. Periostitis of the lower leg is particularly common among athletes who change from one playing surface to another, or who change techniques or equipment.