About Our Practice

Kidney Associates is a Houston-based nephrology practice. The practice covers the spectrum of nephrology care, including chronic kidney disease (CKD) screening and management, dialysis and transplantation care, hospital and office consultative nephrology, vascular access intervention and management and clinical research.


The mission of Kidney Associates is to provide the highest standards of care and service to our patients, as well as optimal service to our colleagues and payors, and to provide an excellent work environment.



Kidney Associates was started in 1980 as Stephen Z. Fadem, M.D., PA. The original offices were in Hermann Professional Building. In 1985 plans were made to develop the first dialysis center, the Houston Kidney Center. This was built by Drs. Fadem and Samir Tuma, a colleague who had left the Baylor faculty to go into clinical practice. By 1988, HKC had started to acquire exclusive managed care contracts and by 1996 had grown to four centers and one of the largest practices in Houston. The dialysis centers were purchased by Total Renal Care, now DaVita.


Meanwhile, the PA continued to grow and Drs. Joey Buquing and Wasae Tabibi joined. The following year Dr. Julie Robeson also joined. In 1994 Cassie Brown, PAC, joined the practice. A new group was born, Kidney Associates. Since then Han Dang, Dana Mitchell, Ruth Wintz and Emil Abdulhyoglu have joined.


We have since added Drs. Rahul Pandey and Sejal Sarolia. Kidney Associates is now a large Houston Community practice that covers Houston and surrounding areas in Sugar Land, Pearland, Jacinto City and Cypress Station.


We continue to grow, but also in depth and character. We have established a very high code of standards to guide us and hopefully be a benchmark for clinical practices around the nation.


The mission of our practice is to provide the highest standards of care and service to our patients, colleagues and payors while providing the best possible place to work.


As we develop newer and better ways to serve our patients, this website will keep you updated.

Core Values


Ever notice how the guest is treated in a hotel. This is how our team is expected to treat you. We want you to feel that you are getting fast attention to your needs. A patient has special needs, and it is our duty to make every reasonable effort to serve you. Our team is expected to return phone calls in a fast, timely manner, refill routine prescriptions on weekdays within 24 hours. We do not want to keep you waiting. The Golden Rule is the power behind good service Do unto others as you would have them do unto you.


When you talk with our team members please note their name. Let us know that they are doing a good job, or if they need to improve. Each member of our team must accept responsibility for their segment in your care. There is no passing the buck. The only way we will improve is to accept our weaknesses and our strengths. Accountability forces integrity.