No anesthesia here: A patient watches his colonoscopy as it happens at Memorial Sloan-Kettering Hospital in New York. Ted Thai/Time & Life Pictures/Getty Image hide caption

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Dr. David Gross, medical director of the sleep lab at the National Rehabilitation Hospital in Washington, D.C., says more than three-quarters of the patients who come to his lab are diagnosed with apnea. Jenny Gold/Kaiser Health News hide caption

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Wouldn't you love to know what she's jotting down? Of course you would. iStockphoto.com hide caption

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Do you really need that MRI, or is your doctor just trying to make a buck? iStockphoto.com hide caption

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