Extended breastfeeding pediatrician?

I recommend Dr. Katya Gerwein in Berkeley.  She supports extended breastfeeding.  She is also a wonderful doctor who cares about her patients.  My kids are lucky to have her as their pediatrician.

"We" breastfed our daughter until she was 2 (in keeping with World Health Organization guidelines, and as is common elsewhere).  She's now 2.75.  Our doctor was Dr. Dong Lin in SF Chinatown, and while I wouldn't say he encouraged us, he certainly didn't have any problem with it.  He is about the kindest, gentlest person we know, very supportive unless there's a reason not to be, and an excellent (western medicine) physician.  His English is fine.  He also always seems available to see her.

We love Dr. Gary Bean in Oakland. Glenview Pediactrics - very open and supportive of extended breastfeeding. I saw him with both of my two kids who were breastfeed past 3 years old.

Update: Location changed. San Bruno as the center, are there any pro-exteded breastfeeding pediatricians nearby?

I'm pretty sure Dr. Paula Brinkley at Bayside Pediatrics would meet this criteria.  She's wonderful!

Myles Abbott at East Bay Pediatrics was completely supportive of my extended breastfeeding -- the first kid until 18 months and the second kid until 3 and a half. He's a warm, supportive doctor and a really nice person.

I breastfed  2 kids until a little over 4.  I saw several pediatricians during this time - in upstate NY at the time, so can't help with the specifics - and none of them batted an eye.  I would suggest if your pediatrician isn't supportive, just switch to ANYONE else.  I think many pediatricians support this practice and it shouldn't be that hard to find.