Hi Gumby. they do labs, in fact they pull iron levels and anemia every 2 to 3 months. My GP monitors most things, but she sent me to a hematologist. the hematologist looks for very specific markers as she calls them which would trigger the need for iron infusion. she said I will need them for the rest of my life as I can no longer absorb iron in my system. She projected about
every 6 months or so as when I will need one. so far I am getting ready for my third one and they have been like clock work every 6 months. She looks specifically at my ferritin levels.
hope this helps. my best advice is have an great general Dr who oversees all others. my does and interacts with the GI, the cardiologist, the hematologist, the nephrologist, the dermatologist, the rhumotologist and lastly the brain surgeon...I have a begnin brain tomur they look at every year. I have worked hard the past few years to get all my doctors who are all on same computer system so they can all talk...which is a good thing