I'm a DO from Ecuador and I've been trying to get my credentials recognized through the USCIS DOCTORS certification process for almost two years now. Failed the first attempt by 4 points, second time by 2. I was devastated after that second one because I genuinely thought I'd prepared well — I'd gone through three textbooks and spent about 6 weeks studying. Clearly something wasn't clicking.
What changed everything was finding a solid USCIS DOCTORS practice test that actually mimicked the real format. The question structure on those practice sets was way closer to what I saw on test day than anything in the study guides I'd been using. I also stopped trying to memorize everything and started focusing on clinical reasoning, especially immigration medical exam procedures and CDC guidelines for panel physicians.
Third attempt I passed with a 78. If anyone else is grinding through this, I want to hear what's worked for you — or if you're just starting out, happy to share more specific exam tips. This certification is no joke but it's absolutely doable.