In cell C1 use the formula =INT(B1-A1) to get the days. Then you have to get the remaining hours, which is the formula =MOD(B1-A1,INT(B1-A1)) and represents the remaining time. So in cell D2 enter the formula =HOUR(MOD(B1-A1,INT(B1-A1))). In cell E2 enter the formula =MINUTE(MOD(B1-A1,INT(B1-A1))).
You can opt out of Medicare Part B and in some situations you should opt out. Most people are automatically enrolled in Medicare Part A and Part B when they turn age 65. And most receive Part B at no charge. Medicare Part B is optional and you may not need the coverage if you have a group health plan.
If you have Medicare because of disability: Medicare Advantage plans are all available to beneficiaries under age 65, regardless of past and present health conditions, with one exception. You cannot enroll in any of these plans if you already have end-stage renal disease, defined as needing regular dialysis or a kidney transplant, but you can still receive care under the traditional Medicare program.