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About Us

About Us

We provide service for Banner - University Medical Center Phoenix, Banner Estrella Medical Center, Banner Ironwood Medical Center, and Banner Goldfield Medical Center.

Currently our group is comprised of over 70 full-time emergency care physicians (board certified/board eligible) and over 35 advanced practice providers.

Our Mission

LEADING the specialty of emergency medicine through timely, efficient, and high-quality service delivered with compassion and respect.

We drive our success by supporting the finest clinicians and staff & maintaining passion for continuous improvement, learning, and clinical excellence.

We place high value on professional achievement while encouraging a strong balance of emotional and physical health for our team.

Founded in 1979
EPS is located
in Phoenix, AZ.

EPS provides excellent patient care in the greater Phoenix area along with top-notch customer support. We strive to provide the best medical care and compassion to our patients. Through our commitment, experience, and expertise EPS has established a business relationship with our customers that will last a lifetime!

Our staff

Office Staff

Elizabeth Mehrer
Director of Operations
Former Chief Operations Officer for EPS

Monica Holt
Practice Manager

Jennifer Crow
Administrative Assistant - Staff Special

Alexas Adams
Staffing Specialist

Nichole Logan
Credentialing Coordinator

Alejandra Cervantez
Associate Administrative Assistant

Hannah LeBron
Lead Scribe/Website Admin

Katie McDonald
Operations Coordinator/Website Admin


Our Directors at EPS hold additional responsibilities at the Banner locations where we provide services.

Richard Bruno, M.D.
EPS Regional Medical Director
Vice Chief of Staff, Banner Ironwood & Banner Goldfield Medical Centers

David Streitwieser, M.D.
EPS Billing Director
MedLink Medical Director

Robert Porter, D.O.
ED Director at Banner Ironwood Medical Center

Marvin (Todd) Clever, M.D.
EMS Director at Banner Estrella Medical Center

Robert Baron, M.D.
EPS QA/QI Director

Moneesh Bhow, M.D.
Medical Director, Dept of Emergency Medicine at Banner - University Medical Center Phoenix
Vice Chief of Staff, Medical Staff at BUMCP

Stephanie Campbell, M.D.
Medical Director & Chairman of Emergency Medicine at Banner Estrella Medical Center

Erin Baas Pace, M.D.
Medical Director, Banner SANE
Site Medical Director at Banner Goldfield Medical Center
Treasurer of the Medical Committee at Banner Ironwood Medical Center

Our Doctors

Emily Arena, M.D.
Erin Baas Pace, M.D.
Robert Baron, M.D.
Andrew Bergeson, D.O.
Moneesh Bhow, M.D.
David Brown, M.D.
Richard Bruno, M.D.
Lloyd (Spencer) Burns, D.O.
Scott Calder, D.O.
Stephanie Campbell, M.D.
Brad Chintis, M.D.
Marvin (Todd) Clever, M.D.
David Cohen, M.D. (per diem)
Carrie Cook, D.O.
Colin Coor, M.D.
Duane Crist, M.D.
Steven Culley, D.O.
Diana Dabell, M.D.
Douglas Dang, M.D.
Ross DeChant, M.D.
Justin Devlin, M.D. (per diem)
Jessica Donlan, D.O.
Shane Elton, D.O.
David Farnie, M.D.
John Gardner, M.D.
Jeffrey Gaver, M.D.
Brian Geyer, M.D.
Amanda Grace, M.D.
Ashley Gray, M.D.
Jason Grimsman, D.O.
Alexandra Grino, M.D.
Shantall Hall, D.O.
Emily Hansen, M.D.
Anne Hermida, M.D.
Mellissa Holden-Leborgne, D.O.
Yousef Janajreh, M.D.
Kevin Johnson, D.O.
Jessica Komara, D.O.
Delmar (Kent) Layton, M.D.
Brian Lehnof, D.O.
Carl Leonhardt, D.O.
Mandy Limberg, D.O.
James (Jim) Lindgren, M.D.
Justin Lo, M.D.
Wendy Lucid, M.D.
Rhiannon Main, D.O.
John Mason, M.D.
Kristen McKinnon, M.D.
Christopher Miedema, M.D.
Joshua (Jed) Millar, D.O.
Alan Molk, M.D.
Aneesh Narang, M.D.
Erick O'Brien, D.O.
James Palmer, M.D.
Gavin Parisi, M.D.
Douglas Patton, M.D.
Robert Porter, D.O.
Wendy Prynn, M.D.
Beth Ranney, M.D.
Samantha Reeder, M.D.
Steven Reinhart, D.O.
Bradley Serack, M.D.
Eric Schenk, M.D.
Richard Seligson, M.D.
Tani Shtull-Leber, D.O.
Shannon Smalley, D.O.
Jerry Snow, M.D.
Dayna Staiert, M.D.
David Streitwieser, M.D.
Thomas Striegel, D.O.
Jared Taylor, D.O.
Jason Theobald, M.D.
Cody Thorstenson, M.D.
Lester Tukan, M.D.
Mahmood Vahedian, M.D.
Nicholas Vasquez, M.D.
Elliot Welder, M.D.
Jessica Wickes, M.D.
Tim Widener, M.D.
Beth Wilson, D.O.
Anthony Wong, M.D.
Zachary Worley, D.O.
Samantha Wu Halpert, M.D.
Teresa Wu, M.D.
Trevin Zarrinkelk, D.O.

Nurse Practitioners and Physician Assistants

Patricia (Val) Armstrong, P.A.
Patricia (Patti) Campbell, A.N.P.
Jaime Cole, P.A.
Matthew Cook, N.P.
Nathan Cook, P.A.
Sara Evans, P.A.
Heather Freeman, P.A.
Kevin Fordell, P.A.
Shelley Garland, P.A.
Kristen Green, N.P. (per diem)
Joseph Harrison, P.A.
James Jarvise, P.A.
Dana Johnson, P.A.
Reese Jones, P.A.
Chaim Kaplan, P.A.
Elizabeth Khoury, P.A.
David Lepley, P.A.
Monica Liu, P.A.
Yvonne Lorenzana, P.A.
Lance McCary, P.A.
Robert McPherson, P.A.
Brandon Morris, P.A.
Aly Myers, P.A.
Michele Paden, P.A.
Brian Pavlue, P.A.
Michael (Mike) Prebil, P.A.
David (Dave) Rigby, P.A.
John Saums, P.A.
LaNika Scepurek, P.A.
Rachel Schwarz, P.A.
Christopher Simpson, P.A.
Victoria (Viki) Smith, P.A.
Sara Sorace, P.A.
Tracy Vincent, P.A.
Joseph (Joey) Vitagliano, P.A. (per diem)
Margaret (Peggy) Vitagliano, P.A.
Lauren Wilcox, P.A. (per diem)
Monica Winter-Zier, P.A.
Arleanne (Leanne) Yelle, F.N.P.
Emergency Professional Services' Doctors