G9054 HCPCS - ONCOLOGY; PRIMARY FOCUS OF VISIT; SUPERVISING, COORDINATING OR MANAGING CARE OF PATIENT WITH TERMINAL CANCER OR FOR WHOM OTHER MEDICAL ILLNESS PREVENTS FURTHER CANCER TREATMENT; INCLUDES SYMPTOM MANAGEMENT, END-OF-LIFE CARE PLANNING, MANAGEMENT OF PALLIATIVE THERAPIES (FOR USE IN A MEDICARE-APPROVED DEMONSTRATION PROJECT)