An urgent care is a great option to get immediate care for you or your loved one. However, if you're on Medicare you should check if the urgent care clinic you're going to accepts Medicare.
Medicare does cover urgent care visits, however some doctors and urgent care clinics choose to opt-out of Medicare. However, based on new federal regulations, even urgent care clinics that have opted-out of Medicare need to treat Medicare patients. The clinics might have to submit additional paperwork, but you as the patient will not experience any issues.