Image: Prescription medicine expenses © Don Farrall, Photodisc, Getty Images

Recently, federal officials made one of the biggest Medicare fraud busts in history, stopping a $375 million home health care scam in Dallas. Dr. Jacques Roy was charged with certifying hundreds of fraudulent claims for Medicare reimbursement and keeping millions in payment for services that either were unnecessary or never provided to patients. He reportedly recruited homeless people as fake patients.

Medicare scams can be elaborate or simple, but the result is the same -- everybody pays the price in higher health insurance premiums. You can help your aging parents stay a step ahead of scammers by looking out for the following.

No, it's not Uncle Sam

Remind your parents that, no, it really won't be the government on the other end of the line if they get a call supposedly about Medicare. Be suspicious if a caller gives a name that sounds official, such as "National Medical Office" or "Medicare National Office," and says you are getting a new Medicare card and will be charged a one-time fee for your Medicare premiums or prescription drug plan. That's the advice from Karen Roberto, a professor and director of the Center for Gerontology at Virginia Polytechnic Institute and State University in Blacksburg, Va.

You should be especially wary if someone asks you for personal information -- such as verifying your Social Security number -- so you can get the new card. If a person calls claiming to represent Medicare and asks for bank routing information to take care of your Medicare premiums, hang up.

Review medical statements

Although it's not exciting stuff, read your health insurance company's explanation of benefits or your Medicare summary notice. Those documents can provide clues as to whether your information has somehow been compromised.

"See what has been billed to your name. Are there charges and dates for services you didn't receive?" asks Alex Johnson, the assistant director of external audit for the Special Investigative Unit of Regence, a health plan that is part of Blue Cross and Blue Shield.

Be on the lookout for double billing for the same thing, says Howard Coan, a spokesman for the Centers for Medicare & Medicaid Services in Baltimore.

Be wary of big promises about health insurance plans

"If it sounds too good to be true, it probably is," says Johnson. Be suspicious of anyone offering you a supplemental program that is cheaper or better than Medicare. Know what it is you're getting and from whom. Think twice if you speak to a provider's office and are told that they think they can get insurance to cover a procedure.

"It's either covered by your program or not. If it's not, or it's a situation where the doctor isn't really known for doing that type of work, you might get stuck with the bill," says Johnson.

To open the door or not?

If someone you don't know comes to your door, assume the worst. No one from "the government" offering Medicare or a prescription drug plan is going to come to your home unannounced. In fact, it is illegal to solicit this way door to door -- an appointment is necessary, says Dusty Hall, an employee benefits agent with CoVerica, a Dallas-based insurance agency.

Also, pay no attention to anyone offering you services who says you can't wait another day to sign up or who won't give you the time for a family member to help you.

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