Doxycycline effective treatment for HA MRSA?

Doxycycline and Minocycline are both viable alternatives. Rifampin can be given along with Mino or Doxy. Clindamycin is effective except resistence is growing. I wouldn't try Bactrim myself. And of course linezolid is very effective against MRSA (Nosocomial or otherwise)[but, expensive]. If the infections reoccur you might have to be decolonized, with mupirocin and Hibiclens washes.
Note: John's Hopkins has an excellent antibiotic guide, online, for professionals.

I have heard of this before.

If you have any question specific to your case, you might ask your doc about what literature he uses for reference as well.