What does NPO stand for?

NPO stands for "Nil Per Os (Nothing By Mouth)"

How to abbreviate "Nil Per Os (Nothing By Mouth)"?

"Nil Per Os (Nothing By Mouth)" can be abbreviated as NPO

What is the meaning of NPO abbreviation?

The meaning of NPO abbreviation is "Nil Per Os (Nothing By Mouth)"

What does NPO mean?

NPO as abbreviation means "Nil Per Os (Nothing By Mouth)"