Here in northern California, the 800-pound gorilla in the medical space is Kaiser-Permanente. They have a “medical secretaries” department that does forms for the doctors. Nope, they don’t do BasicMed. At least, that was the case the last time I asked.
I asked my AME - he didn’t want to do it, but would do it if I greased his palm enough.
There are also independent docs who do DOT medicals for the truckers.