Remember metric unit conversion as follows:
1 gram (g) = 1000 milligrams (mg)
= 1,000,0000 micrograms (mcg)
so: 1,000 mg = 1,000,000 mcg
1 mg = 1,000 mcg
divide by 100 on each side to get the physicians order expressed in mcg
0.01 mg = 10 mcg
So YES - you could use your 1 mcg pill, but you'd have to take 10 of them.