1 O2 oxygen
2 O & P ova & parasite
3 Ob obstetrics
4 OBRA omnibus budget reconciliation act
5 od overdose
6 OD right eye
7 oint ointment
8 OJ orange juice
9 OOB out of bed
10 OP outpatient
11 opp opposite
12 OR operating room
13 Orth orthopedics
14 os mouth
15 OS left eye
16 OSHA occupational safety & health administration
17 OT occupational therapy
18 OTC over the counter
19 OU both eyes
20 OV office visit
21 oz ounce
22 p after
23 P pulse
24 PA physician's assistant
25 PAP papanicolau test (smear)
26 para number of pregnancies
27 Path pathology
28 Pb lead
29 pc after meals
30 PCA patient controlled analgesia
2 O & P ova & parasite
3 Ob obstetrics
4 OBRA omnibus budget reconciliation act
5 od overdose
6 OD right eye
7 oint ointment
8 OJ orange juice
9 OOB out of bed
10 OP outpatient
11 opp opposite
12 OR operating room
13 Orth orthopedics
14 os mouth
15 OS left eye
16 OSHA occupational safety & health administration
17 OT occupational therapy
18 OTC over the counter
19 OU both eyes
20 OV office visit
21 oz ounce
22 p after
23 P pulse
24 PA physician's assistant
25 PAP papanicolau test (smear)
26 para number of pregnancies
27 Path pathology
28 Pb lead
29 pc after meals
30 PCA patient controlled analgesia