To laser-focus on the peninsula/south-bay in the bay area; going to PAMF or Stanford Medical typically results in a 2-3 day wait to see a Dr.
If you're sick, you want to see a Dr asap. I have a doctor at PAMF, a doctor at Stanford Medical, and One Medical. If I am sick, I simply book an appointment at One Medical usually 30-min ahead of time, see them, get whatever treatment I need and go back home and be sick.
When something is truly wrong I start at One Medical for temporary help, and immediately book either at PAMF or Stanford depending on who is available sooner.