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Your doctor is the one who can order an iodine blood test, so you will need to make an appointment with them. Typically, your doctor will order an iodine test in conjunction with other tests for things like thyroid hormone without you having to ask. If you think you have a need for an iodine test, though, ask your doctor. Before the day of your test, talk to your doctor about any medications you are currently taking. Iodine blood tests typically don't have a fasting requirement. Your doctor may order multiple tests for one appointment, though, so check with them to see if you need to fast prior to testing. After your doctor has ordered the test, you will need to get your blood drawn. In some cases, a phlebotomist may come in and do that on the same day. In most cases, though, you will have to go to the lab at or associated with your doctor's office to get your blood taken. For an iodine test by itself, you will generally only have one vacutainer tube taken. It commonly takes about 5-7 days for the lab at your doctor's office to process your test and complete your report. Your doctor should call you once they have your test results. Don't hesitate to ask them any questions you may have regarding your test results once they are in. If you do have lower iodine levels, your doctor may request a follow-up appointment to discuss treatment plans.
Make a doctor's appointment. Get your blood drawn. Discuss the results with your doctor in 5-7 days.