If you don't have any experience working in a doctor's office, consider your connections. Your resume may only take you so far, so network to see if you can get your foot in the door by who you know. Start with your immediate friends and family and ask if they know anyone who works in a medical office.
What's Medicare? Medicare is the federal health insurance program for people who are 65 or older, certain younger people with disabilities, and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD).
There is a little-known Social Security benefit that retirement-age workers can claim. The spousal benefit allows you to get half of your spouse's Social Security retirement benefit when you turn 66. You can collect the spousal benefit so long as you delay taking your own retirement benefit, which grows 8% a year until age 70.