Preoperatve investgatons are frequently ordered on routne basis by surgical as well as anesthetc staf. We hypothesized that ordering of selectve investgatons, if any, to clinically healthy surgical patents by anesthetc staf from Preanesthetc clinic would reduce the cost, save tme and reduce laboratory loads.It is prospectve, descriptve and controlled comparatve study on relatvely healthy patents of American Society of Anesthesiologists (ASA) physical status I coming for surgery in Bir Hospital, Kathmandu, Nepal. Four hundred surgical patents were divided into two groups. Group I consisted of surgical patents who have undergone tests like hemoglobin and urine routne/microscopic (r/m) only. Group II consisted of surgical patents who have undergone hemoglobin & urine r/m and some form of other conventonal investgatons like blood sugar, blood urea, serum creatnine, chest x-ray and ECG. Comparable values between two groups were analyzed by student ‘t’ test and Chi-square test. Data were obtained from 200 patents in group I and 200 in group II. The age, weight, hemoglobin and surgical tme were comparable in both the groups. The mean costs of testng in group I is less than a dollar only whereas same was nearly 4 dollars. Mean costs between two groups was statstcally signifcant Average costs was more expensive in group II. However, not a single major perioperatve complicaton was noted in both the groups. Selectve ordering of laboratory tests reduces the workloads on the lab, reduces the total costs of preanesthetc screening and there is no diference in the morbidity and mortality.Key words: ASA, Costs, laboratory tests, Preanesthetc check-up.