My Medicare patients -- and those who'll soon qualify -- are worried. Will the doctors they're used to seeing still be able to take care of them when big cuts in Medicare payments are constantly hanging overhead? Even if I keep seeing a particular patient, I don't know that I'll still be able to find specialists to examine his skin, perform his stress test, operate on his hip or remove his cataract. Medicare reimbursement to me for an average primary-care visit has remained around $50 for the past decade, even as my office expenses have skyrocketed. Cataract and hip-replacement operations...