Individuals who seek to immigrate to America must be admissible into the country and so they must undergo medical examinations and establish that they are not inadmissible to the United States based on public health grounds.
Generally, adjustment of status applicants and people applying for nonimmigrant visas will have to undergo medical examinations and submit Form I-693, Report of Medical Examination and Vaccination Record this form must be completed by the civil surgeon who conducts the medical examination and you need to submit Form I-485 and Form I-693 together. Likewise, people who obtain immigrant visas through consular processing also must undergo medical examinations, prior to filing their immigrant visa applications.
Green Card medical exams must be conducted by doctors who are authorized by the USCIS and you can find the list of authorized doctors, on the USCIS website. You can also obtain information about the civil surgeons by contacting the National Customer Service Center and you can contact the service center by dialing 1-800-375-5283.
USCIS does not regulate the fees and the rates vary and all the doctors do not charge the same fee. So you may contact the doctors before arranging your medical exam and you may use the “USCIS Civil Surgeons Locator” for information on civil surgeons near you. You can then fix an appointment with an authorized doctor and appear for a medical exam. Remember that you will have to take with you Form I-693 and the doctor will use that form to document the results of the medical examination.
You can have your medical exam done prior to submitting your adjustment of status application and you can use the results for a year. The authorized doctor who conducts the medical exam must fill out Form I-693 and the doctor will return the completed form to you in a sealed envelope.
You must not open that envelope and your medical report will not be accepted by the USCIS if the envelope is opened. See that you print the latest version of Form I-693 and you should complete only the first part of the application. You must affix your signature only after you are instructed to do so and the civil surgeon might instruct you to sign the form after documenting the results.
The purpose of the medical exam is to make sure that you do not have communicable diseases and according to the US immigration laws, people applying for United States Green Cards must have had certain vaccinations.