What Does mcg Mean in Medical Terms?

mcg stands for microgram. Unit of weight, one millionth of a gram.

Where you will see mcg

You will most often see mcg in medication orders and prescriptions, laboratory orders and test results.

Example

A medication order might be written with “mcg” as shorthand for microgram.

Related abbreviations

• 1,25-(OH)2 vitamin D — 1,25-dihydroxyvitamin D
• 14-3-3 — 14-3-3 protein (CSF)
• 17-OHP — 17-hydroxyprogesterone
• 1h GTT — one-hour glucose challenge test
• 21-hydroxylase — 21-hydroxylase deficiency (CAH)
• 25-OH vitamin D — 25-hydroxyvitamin D
• 3% saline — three percent saline (hypertonic)
• 3h GTT — three-hour glucose tolerance test

Browse the full Medical Abbreviations guide — 5,715 entries, searchable A–Z and by specialty.