I have medicare and medi-cal. I would like to go to an inpatient program. Is there such a thing?

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!