Thank you for your question. Pre-operative medical clearance is important to obtain prior to any surgical procedure, especially elective cosmetic surgery, in order to determine that the patient is in optimal health to handle the proposed surgery. Pre-operative clearance is generally performed by a patients primary care physician and can include bloodwork, ekg, mammogram/breast sonogram, etc..., all of which your primary care physician signs off on. Labs performed for purpose of medical clearance can indicate that the patient suffers from anemia, diabetes, has an infection, is pregnant, has potassium issues, etc... all of which are important to know and take care of before any surgery is to be performed. I hope this helps and I wish you the best of luck.