Yes there are many inpatient programs for people with eating disorders. At the URL below are two private ones in Sherman Oaks and Santa Barbara.They are undoubtedly very expensive. I guess the question is will Medicare or Medi-cal pay for them (?).
http://www.newdirectionseatingdisorders.com/
I really don't know what Medi-cal's stance is on that. There are some online resources that may be helpful -
There's an anorexia website with a forum:
http://community.livejournal.com/proanorexia
and the National Association of Anorexia Nervosa may have some resources you can use:
http://www.anad.org/
as well as ANRED
http://www.anred.com/
Good luck!