Per date of service / per day reporting80305, 80306, 80307: code descriptors specify billing per date of service; G0659: per day; G0481/G0482/G0483: per profile class counts
Presumptive direct observation80305 — presumptive tests read by direct observation, includes sample validation when performed, billed per date of service
Presumptive instrument-assisted80306 — presumptive tests read by instrument-assisted direct observation, includes sample validation when performed, billed per date of service
Definitive (1–7 classes)80307 — definitive tests (GC/MS, LC/MS etc.), includes specimen validity testing, billed per 1–7 drug classes
Definitive (8–14 classes)G0481 — definitive testing per 8–14 drug classes, includes specimen validity testing
Definitive (15–21+ classes)G0482 / G0483 — definitive testing per 15–21+ drug classes, includes specimen validity testing