Dr. William U. Heard practices with Mercy Physicians Medical Group at 3900 Fifth Ave #370 in Hillcrest, the 1983-founded IPA that grew from 80 charter physicians into a 100+ primary care and 450+ specialist directory partnered with Scripps Mercy Hospital. The MPMG specialty network funnels dermatology consults directly to MedDerm Dermatology in the same uptown medical cluster for skin cancer screening and chronic skin-condition management. The suite 370 office handles annual physicals, chronic-condition management for hypertension and type 2 diabetes, and preventive care coordination for adult patients in 92103. Lab draws and imaging route through the Fifth Ave medical office building shared with Scripps Mercy campus facilities. Nephrology and dialysis referrals from MPMG primary care physicians route through Balboa Nephrology Hillcrest, maintaining in-network continuity for Scripps Mercy-authorized HMO plans. Complex hospitalizations requiring the Level I Trauma Center, robotic surgery suites, or Level II NICU admit directly across Fifth Ave at Scripps Mercy Hospital San Diego.