I was referred to D r. Zang by Dr. Madhuri Koganti. She was not certain if my problem, numbness in my hands, was not from the ongoing problem with my neck. Dr. Zang is aware of this problem. I have been going to Dr. Zang for several years. We are now in the process of making that determination. My past experience with Dr. Zang gives me great great confidence in his ability to deal with my problem.