"If you ask for a test, chances are your doctor might order it for you," said Besser. "But there are ways to ensure that you only get the tests that are truly necessary.
"Find a doctor you can talk to, be prepared, write your questions up ahead of time," said Besser. "Choose your words carefully and be direct with your doctor."
According to Thomas Goetz, author of "The Decision Tree," the limited time patients are offered with their doctor means it is up to the patient to do the research before asking their doctors for another test.
"The overuse of these kinds of tests is something we need to guard against more rigorously," said Goetz. "We're often too quick to use invasive tests."
Keeping track of the types of tests you've done, the results of the test, and the length of time in between each test is another way to know if the test you're being offered is appropriate, said Gibson.
"Informed and empowered patients can say no to tests," she said. "And now there's a growing phenomenon of patients saying no."
But this doesn't mean that every test offered to you warrants a flat out refusal. "When you are offered a test, make sure to ask your doctor why the test is being ordered and how it will help you," Besser said.