>> reporter: kathleen casey- kirschling is a retired teacher, grandmother, and one of the very first baby boomers. she was born just after midnight on january 1, 1946, one of 3.5 million americans born that year. >> it is a full-time job to stay healthy. >> reporter: today, kirschling turns 65, an age typically linked with retirement, medicare eligibility, or just plain growing old. >> to any of my fellow boomers are getting sick, having open- heart surgery, going through cancer. >> reporter: time is starting to catch up to the generation that brought more than peace and love to the world. when they went to school, they overcrowded classrooms. boomer women flood the workforce for the first time. and now that 10,000 of them are turning 65 every day, they're set to overwhelm the health care system, too. >> i don't know how we're going to sustain the system. >> reporter: dr. camilo echanique already works 60 hours a week and sees about 20 patients a day. >> bring your arm up here. >> reporter: that's common in an industry severely short of primary care physicians. he estimates over the