HOH
hard of hearing
HOB
head of bed
HOSA
health occupation students of america
H&P
history and physical
Hr, hr, H, h
hour, hours
HS
hours of sleep (bedtime)
Ht
height
Hx, hx
history
hypo
hypodermic injection
Hyst
hysterectomy
I&D
Incision and drainage
I&O
Intake and Output
ICCU
Intensive coronary care unit
ICD
International classification of diseases
ICU
Intensive care unit
ID
Intradermal
IDDM
Insulin-dependent diabetes mellitus
IH
Infectious hepatitis
IM
Intramuscular
imp
Impression
in
inch
inf
infusion, inferior, infection
ing
inguinal
inj
injection