CPT Code 20550: 2026 Billing Guide for Tendon Sheath Injections
CPT 20550 covers a single injection into one tendon sheath, ligament, or aponeurosis, such as the plantar fascia. The official American Medical Association descriptor reads: “Injection(s); single tendon sheath, or ligament, aponeurosis (eg, plantar ‘fascia’).” You’re either picking the code, sorting out the modifier, or working a 20550 cpt code denial that already came back. […]