I am a second year IM resident at an allopathic, large state university. I took and passed both comlex and usmle step 1 and 2 (with good scores) and did very well on comlex step 3. I am now trying to decide whether I need to take usmle step 3 as well to make myself the most competitive candidate for an allopathic heme/onc fellowship. I would have no problem taking usmle step 3 "just in case," but just discovered that would mean also having to go back and take usmle step 2 CS (for $1100). Just trying to measure the risks and benefits.