PCP Doctor recommendation in NYC familiar with RNY Patients

Hi,

Just moved to NYC and looking for a recommendation for a PCP familiar with RNY patients. Can anyone recommend someone please?!  Having issues with my vitamin levels, etc and the doctor I'm seeing is clueless.  Also going to be trying to have a baby next year so need to get a good doctor familiar with gastric bypass patients.  

Thanks!!

 I see Dr. Charles Saha on the Upper East Side. He works closely with my suregon (Dr. Kini) and is very familar with weight loss surgery. Good luck!