A
B
C-D
E-G
H-I
100

alcoholics anonymous

AA

100

barium enema

BE

100

with 

c

100

emergency department 

ED

100

hour

h

200

before meals

a.c.

200

twice a day

BID, b.i.d., bid
200

carcinoma (cancer)

CA, ca

200

emergency room

ER

200

hour of sleep (bedtime)

h.s.

300

right ear

AD, a.d.

300

blood pressure 

BP

300

capsule

cap. 

300

fracture

Fx, fx
300

height

Ht., ht

400

freely, as often as desired

ad lib

400

bedrest

BR

400

discontinue

disc, DC, d.c.

400

gram

g, gm

400

history

Hx

500

morning

am, AM

500

bathroom privilages

BRP

500

don not resuscitate

DNR

500

drop, drops

gt, gtt

500
history and physical 

H & P