All qualitative and quantitative tests on blood, urine or other body fluid for: (a) a drug or drugs of abuse (including illegal drugs and legally available drugs taken other than in appropriate dosage); or (b) ingested or absorbed toxic chemicals; including a service described in item 66800, 66803, 66806, 66812 or 66815 (if performed), but excluding: (c) the surveillance of sports people and athletes for performance improving substances; and (d) the monitoring of patients participating in a drug abuse treatment program