UpToDate is the probably the most used clinical resource by doctors in the US. I was surprised to learn that it's available for individuals to subscribe to.

Every hospital makes UpToDate available to its clinicians, because it's so universal. The depth and quality of content is many steps above what someone can find through a web search, and nearly all the clinical content is authored by physicians. It's also what most primary care doctors are looking at when they do more research on something they don't know the answer to in the office. You can find the current standards of care to expect for a specific condition or disease here, with the exception being if you are being treated at an academic hospital providing treatments closer to the leading edge.