Michelle Kuppersmith, 32, feels great, works full time and exercises three to four times a week. So she was surprised when a routine blood test found that her body was making too many platelets, which help control bleeding. Kuppersmith’s doctor suspected she had a rare blood disorder called essential thrombocythemia , which can lead to blood clots, strokes and, in rare cases, leukemia. Send Us Your Medical Bill Do you have an exorbitant or baffling medical bill? Join the KHN and NPR ‘Bill of the Month’ Club and tell us about your experience. We’ll feature a new one each month. Submit Your Bill Her doctor suggested a bone marrow biopsy, in which a large needle is used to suck out a sample of the spongy tissue at the center of the patient’s hip bone. Doctors examine the bone marrow under a microscope and analyze the DNA. The procedure allows doctors to judge a patient’s prognosis and select treatment, if needed. Kuppersmith had heard the procedure can be intensely painful, s...