You will need to fill out a preliminary application through MedXPress. Information on how to complete this can be found at https://www.faa.gov/licenses_certificates/medical_certification/get
Next, the FAA has deemed that all potential pilots undergo an exam from a certified Aviation Medical Examiner (AME). We can provide you with a list of local AMEs or you can search for you own through the following link: https://www.faa.gov/pilots/amelocator
You will only require a Third Class Medical Certificate for your Private Pilot’s License. If you are over 40, the certificate is good for 2 years. If you are under 40, the certificate is good for 5 years.