how to prevent medicare fraud

Do protect your Medicare number (on your Medicare card) and your Social Security Number (on your Social Security card). Treat your Medicare card like it’s a credit card.
Do remember that nothing is ever “free.” Don’t accept offers of money or gifts for free medical care.
Do ask questions. You have a right to know everything about your medical care including the costs billed to Medicare.
Do educate yourself about Medicare. Know your rights and know what a provider can and can’t bill to Medicare.

Do use a calendar to record all of your doctor’s appointments and what tests or X-rays you get. Then check your Medicare statements carefully to make sure you got each service listed and that all the details are correct. If you spend time in a hospital, make sure the admission date, discharge date, and diagnosis on your bill are correct.
Do be wary of providers who tell you that the item or service isn’t usually covered, but they “know how to bill Medicare” so Medicare will pay.
Do make sure you understand how a plan works before you join.
Do always check your pills before you leave the pharmacy to be sure you got the correct medication, including whether it’s a brand or generic and the full amount. If you don’t get your full prescription, report the problem to the pharmacist.
Do report suspected instances of fraud.