Here is my story:
My application is still in the house, I'm waiting for the translation of my Police Clearance, so I haven't sent anything yet to CIC.
I did my medical a month ago (I didn't know the police clearance will take so long, or else I would have waited a couple of weeks for the medical). I called the office and the nurse told me to go there anytime between 8 am - 11 am. I went on the 15th of October at 8 am. I was called in the office where a nurse asked me for my passport. She took a picture of me with a digital camera and filled out a form on her computer with my information from the passport. She then asked me about my medical history (did you ever have Hepatitis, HIV, etc.) After that, she printed out my eMedical receipt (which had my name on it and a list with the tests I was going to have) and she gave me my passport back. She sent me to another room to get my blood taken, urine and X-ray.
I came back to her office again and I waited there for the doctor. After about 30 mins, the doctor called me in his office. He discussed with me the results of my tests (showed me my X-ray, etc). He also did an eye sight check and he listened to my lungs.
I left the office with my eMedical paper. On the 24th of October I received in the mail a letter form CIC London, asking me to go back to the doctor because I need to do more tests. It turns out that they saw a scar on my lung and they want to test my sputum for TB. I'm not worried about that since the scar is from pneumonia I had as a child.
You see, my doctor sent the results right away, and as soon as the CIC doctors received it, they reviewed it. Since it's an up front medical and I haven't filed my application yet, they contacted me by mail at the address I provided to the doctor. They gave me a temporary UCI number and my medical file has a UMI number too (Unique Medical Identifier). This UMI number that is on my eMedical receipt and I will attach to my application, will help them match my medical to my application.
And don't be sorry for asking questions, we are all here to help each other and share our experiences. It's a traumatizing process!
And if you want more information about panel physicians and their duties, you can read their handbook here: http://www.cic.gc.ca/english/department/partner/pp/pdf/handbook-extract.pdf