You will get your medical done by 3-4 days after you get your INS doctors appointment.
For the most current list of civil surgeons in your area, please call the National Customer Service Center at 1-800-375-5283. After you have selected English or Spanish as your language of choice for the message, choose #2 for medical examinations from the list of six automated options. You will be asked to key in your zip code to help determine the list of designated civil surgeons close to you. Have pencil and paper ready to record the names of the civil surgeons provided.
Once you get your medical exam done, you will be given a sealed cover to be handed over to your lawyer to be filed along with your 485 apps
If you need any help please ask so that i can help you out.