John J. Feng, M.D. I have only spoken with Dr. Feng on the phone. He answered all of my questions and returned calls. He also quickly responded to my e-mails. The staff at lapsf has been very helpful. will meet with him the day before surgery as well.Post-Op. I met with Dr.Feng and his staff.He spent alot of time with me and my husband.All of the other Dr.s were involved with my case either with seeing me post-op, discharge etc. They also called back immediately when I returned home.I feel as if I am in very safe, knowledgable and supportive hands.