I would see no reason for Original Medicare not to pay "allowable amounts" to CC for AVR surgery. Post-op care and emergencies normally are covered, sometime in full and sometimes partially. More and more services are requiring co-pays and deductibles. Medicare normally sets "allowable amounts" for all services. Be careful to ask if your health care provider accepts these "allowable amounts" as payment. If not, you owe the balance above the Medicare approved amount. If you have a medicare supplement besides Original Medicare, you should ask the supplement carrier about their coverage at CC. I have been on Medicare for 11 years and find that it is always best to check with Medicare and/or the supplent insurer AND the medical provider BEFORE any expensive procedure. That way, hopefully, there will be few surprises. If you are new to Medicare, spend some time with the bible "Medicare and You" that will be sent to you prior to your eligibility for Medicare. Good Luck.