N with a line on top
within
NA
not applicable
NC
No change
neg
negative
neuro
Neurologic
noc
at night
NPO
Nothing by mouth
NSAIDS
Non steroidal anti immflamtory drugs
N/T
Not tested
NWB
Non Weight Bearing
O:
Objective
OA
Osteoarthritis
OB
Obstetrics
OCD
Obsessive Compulsive Disorder
OCS
Oral Contraceptives
od
once daily
OD
Oculus Dexter (right eye) Overdose
OP
out patient
OR
Operating Room
ORIF
Open Reduction with Internal Fixation
ortho
orthopedic
OS
oculus sinister (left eye)/Mouth
OT
Occupational Therapy
OTC
Over the Counter