Dr. Zhengnan Yin MD » Memorial Southwest Family Practice Go back to directory. Add to Address Book. Dr. Zhengnan Yin MD Family Medicine Memorial Southwest Family Practice Work 9440 Bellaire Blvd. Ste. 106 Houston Texas 77036 work Work Phone: (713) 778-074work Work Fax: (713) 778-6098workfax Categories: Suite 106 Updated 3 years ago.