April 4th, 2012
12:01 AM ET

5 medical tests you often don't need

Forty-five tests and procedures routinely performed on patients are often unnecessary, according to a report released Wednesday by nine physician groups, the Consumers Union, and the American Board of Internal Medicine Foundation.

“Many of the things that are routinely done are things that patients have come to expect and doctors have routinely ordered,” said Dr. Christine Cassel, president and CEO of the ABIM Foundation. “These are not things that should never be done, but they are things that are often overused.”

It's more ammunition to ask your doctor whether your tests and treatments are necessary, especially given that patients request many of them.

“Often the doctors will say the patients are asking for these things,” Cassel told CNN.

The groups looked at the scientific rational for performing each of the tests and procedures listed in the report. According to the doctors, here are five tests you often do not need:

1. A CT scan or MRI scan after fainting
If your behavior is normal (no seizures or neurological problems) then a brain scan is unlikely to improve your outcome.

2. An annual cardiac stress test
If you're otherwise healthy, repeating the test every year or so rarely changes the course of your treatment. But additional tests could lead to more invasive tests and unwanted radiation, according to the American College of Cardiology.

3. A chest x-ray before outpatient surgery
If you have a moderate to good functioning heart you probably don’t need the scan as part of your assessment before a low risk surgery.

“There’s good evidence that adding a chest x-ray before you have the surgery doesn’t pick up abnormalities that the doctor needs to know about before the operation,” Dr. Cassel said.

4. A back scan within the first six weeks of lower back pain
When a physical exam of your back fails to find the source of your pain, a back scan isn’t likely to reveal the source of your pain and therefore won't improve the outcome – but it will drive up costs.

5. A repeat colorectal cancer screening
Beginning at age 50, one high-quality colonoscopy every 10 years is all you need if your results are normal.

The website ChoosingWisely.org lists all 45 tests and procedures featured in the report.  It was developed by these doctors' groups along with Consumer Reports and the American Board of Internal Medicine Foundation to help doctors control the cost of U.S. health care.

“This is about getting rid of the fat in the system," said Cassel. "Getting rid of waste."

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Get a behind-the-scenes look at the latest stories from CNN Chief Medical Correspondent, Dr. Sanjay Gupta, Senior Medical Correspondent Elizabeth Cohen and the CNN Medical Unit producers. They'll share news and views on health and medical trends - info that will help you take better care of yourself and the people you love.