I am not aware of any list that is out there which lists programs that require step2 results for application. In fact, I am fairly certain that few if any programs would ask for step2ck from american medical students. For IMGs the programs might be pickier. If you are a student at a US/Canadian school virtually no program will ask for step 2 up front with the application. However, there are certain programs which will open state that they will be hesitant to give a favorable spot on their ranking of applicants in February until they know that you have passed step 2ck.
The best way to find out is to browse the website of the programs that you are interested in and see for yourself. Go to
www.ama-assn.org and search the residency databased for the region and speciality that you are interested in. A website for the program is almost always listed with each program listing. Click on it and go to application requirements on the program website.
If you did well on step 1, my advice would be for you to take step2ck prior to the interview stage ONLY if you are fairly certain that you will do well based on how well you have done on your shelf exams or diagnostic tests.
Otherwise, take step2 after the interview stage, but not later than December so that the programs will have your step2ck score for the final ranking stage.
The reason I say you should consider taking step 2ck prior to the interview stage ONLY if you think that you will do well is because having passed step 1 AND step2ck with good scores might get you that extra interview at one of your reach programs (ie. the highest tier). HOWEVER, if you have a strong step 1 score and for some reason you end up dropping the step 2ck score by 20-30points (which probably happens less often), then you might end up not getting a couple interviews from the most competitive programs.
Either way,try to take the step 2ck prior to the ranking stage because certainly if two applications are identical but one applicant has passed the step2ck and the other applicant has not taken it yet, then the person who has passed the step2ck will get a more favorable position on the program's ranking of applicants. Basically the program directors would want to minimize their risk of matching someone into their program who ends up failing the step2ck (again, this probably happens less often).
I know that the various Johns Hopkins programs strongly prefer the step2ck to be available by ranking stage though they will offer interviews without it. UPenn has been a little finicky about preferring to see step2ck results even prior to offering interviews for some applicants.
In surgical subspecialties many people will avoid the step2ck until after match. I do not personally agree with that strategy unless the rest of your application is top notch. As I said, between two people who have identical apps, the person with the step2ck score in place will carry the day.
So here are the take home points:
1) If you did well on step 1, ONLY take step2ck prior to interview stage if you have reason to suspect that you have a strong chance of doing well on the step2ck.
2) If you drop the step2ck score by 30 points, it is certainly not going to eliminate your chance of getting a good residency, but it might throw a slight kink into your application.
3) By all means, take the step2ck no later than december of senior year so that the programs will see your score when they are deciding the final applicant ranking.
4) a strong step 1 will help you tremendously, a strong step 1 and a strong step 2ck will help you a little more, but a strong step 1 with a comparatively weaker step2ck score will hurt your application slightly.
5) when you prepare and submit ERAS (electronic residency application) make sure you do not select the option of automatically sending step2 scores to the programs. If for some reason an applicant has a bad day and does poorly on the step2ck, the applicant is much better off being able to control when the step2ck score is released to programs and which programs to release it to.
It seems that people have been receiving their step2ck results approximately 4 weeks after taking the exam, and if you wish you can make the results available immediately to the programs you applied to, and the programs will receive them via ERAS within 3-4hrs.
Again, the above is what I have gleaned going through the application process and by speaking with other people. I think it makes a lot of sense, but you might get different advice from other people.