Question: The provider diagnosed the patient with plantar fasciitis. What is plantar fasciitis, and what ICD-10-CM code should I report for this diagnosis? Oklahoma Subscriber Answer: Plantar fasciitis is the inflammation of the plantar fascia, which is a thick aponeurosis that supports the arch on the bottom (plantar side) of the foot. When your provider diagnoses a patient with plantar fasciitis, you should report M72.2 (Plantar fascial fibromatosis). If you look in the ICD-10 manual, you will notice that plantar fasciitis is an included diagnosis for M72.2. Don’t miss: Code M72.2 is not a blanket code that covers any condition that may be associated with the plantar fascia. Read the medical record carefully to make sure you understand exactly which diagnosis your provider documented.