Our Doctors

Bradley A. Whitaker


Dr. Whitaker practices in the following office locations:

Monday and Tuesday: Tucson Office
Wednesday: Oro Valley Office

Please call our office at (520) 575-0800 if you would like to make an appointment with Dr. Whitaker. Our office staff would be happy to help you

Peter C. Merrill


Dr. Peter Merrill, DPM is a podiatrist treating both children and adults for a variety of foot / ankle related issues. As an athlete and a sports coach himself, he understands what it takes to be your very best. He enjoys taking care of young athletes and helping them achieve their goals. Dr. Merrill also enjoys treating adults. To him, every foot tells a story about a life and he works to help you live it pain-free. Dr. Merrill has a special interest in educating diabetic patients about their feet including how to prevent ulcerations and even amputations.

His patients find him approachable and easy to talk to. Dr. Merrill enjoys finding out what he has in common with each patient and tailors his treatment to the patient. He believes in strong character traits like integrity, honesty and family values. He loves being a husband and father and treats everyone he sees as if they were a member of his family. In his spare time, you might find Dr. Merrill spending time with his family, heading out on a Jeep trail, hiking, fishing or in the stands at a local sporting event.

Dr. Merrill is an active member of the medical staffs at Northwest Medical Center and Oro Valley Hospital.

Medical Training

Doctor of Podiatric Medicine, College of Podiatric Medicine and Surgery, Des Moines, IA

PM&S 36 month Residency, Southern Arizona VA Healthcare Center, Tucson, AZ

Professional Memberships

  • American College of Foot & Ankle Surgeons
  • American Podiatric Medical Association

Dr. Merrill practices in the following office locations:

Monday: Green Valley Office

Tuesday, Wednesday: Tucson Office

Thursday: Oro Valley Office

Please call our office at (520) 575-0800 if you would like to make an appointment with Dr. Merrill. Our office staff would be happy to help you!

Zeno Pfau


Zeno Pfau was born in San Diego, California, and shortly after, relocated to Tucson Arizona where he spent most of his life. After finishing high school, he attended the University of Arizona where he met his wife, and together have the great and rewarding opportunity of raising their 6 children. After finishing his undergraduate studies, Dr. Pfau had the opportunity to teach science at the high school level and was the boys varsity soccer coach. During this time, he was introduced to Podiatry by a family friend. Dr. Pfau was drawn into the profession and the opportunities it provided to interact and help those in pain and discomfort.

After obtaining his doctorate in podiatric medicine and surgery, Dr. Pfau completed a surgical residency at Northern Colorado Medical Center. During his residency in Greeley and work in private practice in Colorado, he developed an appreciation for Colorado and its people. He is grateful for the many opportunities he had to serve others throughout this time.

Arizona! Dr. Pfau is excited to return to Arizona where he will continue to have the privilege to help others find pain relief. He is especially excited to join that same practice that introduced him to Podiatry. When Dr. Pfau is not doing what podiatrists do, he spends his time with his wife and kids serving in his church and community, coaching soccer, fishing, boating, hiking, and watching his UofA Wildcats compete in sporting events.

Monday and Thursday – Tucson Office 8:00-5:00
Tuesday and Wednesday – Green Valley office 8:00-3:00