Quest Diagnostics Healthcare professionals Clinical Education Center FAQ QuantiFERON TB Gold Plus QuantiFERON®-TB Gold PlusTest code(s) 36970 (1 tube, non-incubated), 36971 (4 tubes, draw-site incubated), 37616 (Pre-biologic/bio- similar Screen Panel, HCV/HBV with Reflexes and QFT 1 ...