O&P
Ova
&
Parasites
O2
Oxygen
Ob, Obs
Obstetrics
OBRA
Omnibus
Budget
Reconciliation
Act
od
Overdose
OD
Right eye, occular dextra, Doctor of Optometry
oint
Ointment
OJ
Orange Juice
OOB
Out
Of
Bed
OP
Outpatient
OPD, OPC
Outpatient Department
Outpatient Clinic
opp
Opposite
OR
Operating
Room
Ord
Orderly
Orth
Orthopedics
os
Mouth
OS
Left eye, occular sinistra
OSHA
Occupational
Safety and
Health
Administration
OT
Occupational
Therapy/ Therapist
OTC
Over
The
Counter
OU
Each eye
OV
Office
Visit
oz
Ounce