Where in Houston TX can I get a beard transplant???

The gold standard for a hair transplant specialist is the American Board of Hair Restoration Surgery. It is the only Certifying Board recognized by ISHRS. The highest qualification within ISHRS is the Fellow of ISHRS. Realself has also carefully vetted their recommended surgeons.

You can look for surgeon in your area by doing a Google or Bing or Yahoo search.  You can also look up surgeons on the ISHRS org website.

Any doctor can be found through realself or the International Society for Hair Restoration Surgeons web site.  

You can google it. However there are doctors that are more experienced than others. You may want to do research in sites such as ISHRS to find out about their back ground and years of experience.