The theft of a computer containing information on more than 4 million patients of a major Northern California health care provider may be among the largest breaches of healthcare data in recent years, but it's far from the only incident of its kind. Over the last two years, healthcare organizations have reported 364 incidents involving the loss or theft of information ranging from names and addresses to social security numbers and medical diagnoses on nearly 18 million patients _ equivalent to the population of Florida. A thief stole medical information on more than 4 million patients of Sacramento-based Sutter Health last month by the simple act of breaking a window with a rock at the affiliated Sutter Medical Foundation. Stolen over the weekend of Oct. 15 were monitors, keyboards and a desktop computer containing patient information dating to 1995.