On Step 3, you do not need to go back to Dr. unless the test results show another review with the Dr. They told us that if blood tests don't look good, he will call us and we need to go to see him, it may also then require x-rays .
On my case, we were just able to send the Dr. the vaccine records via text instead of going to visit him again. Blood test results for my mom was OK and vaccine records sent to him via text, so only getting the exam package for the Immigration office