Medical Directors

Tariq (Terry) Al-Mutawa, MD
MD, University of Arizona, Tucson
Board Certification:Internal Medicine

Bernadette Arnecke, MD
MD, University of Texas Medical Branch, Galveston
Board Certification: Internal Medicine

Mario Avila, MD
Wayne State University School of Medicine, Detroit, Michigan
Board Certification: Internal Medicine

Kevin Berger, MD
MD, University of the Witwatersrand, Johannesburg
Board Certification: Pediatrics

Wendy Bernatavicius, MD
MD, Drexel University College of Medicine
Board Certification: Pediatrics

Franc W. Brodar, MD
MD, Jefferson Medical College, Philadelphia
Board Certification: Internal Medicine

David Butler, MD
MD, Medical College of Wisconsin, Milwaukee
Board Certification: Internal Medicine and Pediatrics

Carla Denham, MD
MD, University of Arizona, Tucson
Board Certification: Psychiatry

Mark Edwin, MD
MD, McGill University, Montreal
Board Certification: Family Practice

Tom Fitch, MD
MD, University of Kansas, Kansas City
Board Certification: Internal Medicine, Palliative Medicine, Hematology, Oncology

Anne Gilbertson, MD
MD, University of Arizona, Tucson
Board Certification: Family Practice

Joanne Gurin, MD
MD, State University of New York, Brooklyn
Board Certification: Internal Medicine

Gillian Hamilton, MD, PhD
MD, University of Arizona, Tucson.PhD, physiological and clinical psychology, University of Florida
Board Certification: Geriatrics, Internal Medicine, Hospice & Palliative Medicine

Sally Kalpakoff, DO
DO, Philadelphia College of Osteopathic Medicine, Philadelphia
Board Certification: Family Medicine, Geriatrics, Hospice & Palliative Medicine

Gregory Mayer, MD, MBA
MD, Tulane University School of Medicine.MBA International Management, Thunderbird School of Global
Board Certification: Hospice & Palliative Medicine

Yagnesh Patel, MD
University of Nairobi, Kenya
Board Certification: Internal Medicine

Allison Perrin, MD
MD, Wayne State University, Detroit
Board Certification: Internal Medicine

Lori Porter, DO
Midwestern University/Chicago College of Osteopathic Medicine
Board Certification: Internal Medicine

Eric Prommer, MD
MD, Feinberg School of Medicine, Northwestern University, Chicago
Board Certification: Hematology, Oncology

Nisal  Samarasekera, MD
MD, University of Colorado School of Medicine, Denver
Board Certification: Family Medicine

Juanita M. Sapp, MD
MD, Creighton University, Omaha
Board Certification: Internal Medicine

Tressia Shaw, MD
MD, University of Arizona, Tucson
Board Certification: Internal Medicine, Pediatrics

Sukhjit Singh, MD
MD, Dayanand Medical College, Punjab University, India
Board Certification: Internal Medicine

Theresa Stevens, MD
MD, Medical College of Wisconsin, Milwaukee
Board Certification: Internal Medicine

Ned Stolzberg, MD
MD, University of Massachusetts, Worcester
Board Certification: Family Practice

Kimberly Stone. MD
Meharry Medical College, Nashville TN
Board Certification: Internal Medicine

Gerrit Terpstra, MD, AGSF
MD, Leyden University, Leyden, Netherlands
Board Certification: Internal Medicine, Hospice & Palliative Medicine

Derek Thompson, MD
MD, University of Connecticut, Farmington
Board Certification: Internal Medicine

John J. Williams, MD
MD, University of Arizona, Tucson
Board Certification: Family Medicine

William Zipperer, Jr., DO
DO, Philadelphia College of Osteopathic Medicine
Board Certification: Internal Medicine, Geriatrics