This special blood draw is requested by your provider for medical reasons, such as Hemochromatosis, an iron overload disorder that causes the body to absorb too much iron from food. The procedure removes red blood cells, causing iron levels to drop.

With therapeutic phlebotomy, more blood is drawn than during a regular blood draw.

Your doctor will decide how much blood will be drawn based on the reason you're having the procedure.

You must have a doctor's order for this  particular blood draw that's done to treat a medical problems.