Medical Specialties

Emergency Medicine

Pediatric Emergency Medicine

The Phoenix Children's Hospital's Pediatric Emergency Department is the only pediatric emergency service in a free-standing children’s hospital in Arizona. Our emergency services are exclusively for children.

Take the Emergency Department patient survey now.Providing state of the art emergency care 24/7, every one of our full-time physicians are Pediatric Emergency Medicine trained specialists and come from leading U.S. and Canadian children's hospitals. Nursing staff have unequaled pediatric emergency experience and expertise.

And with more than 65,000 visits annually, the Emergency Department uses every bit of that expertise in caring for Arizona's children.

Upon the completion of our ED expansion in 2012, the 84-room Emergency Department will include:

  • An emergency department exclusively for kids in the only free-standing children’s hospital in the state of Arizona
  • All full-time physicians are Pediatric Emergency Medicine trained
  • More than 65,000 visits annually
  • 56 beds (exam as well as preprocedure rooms)
  • 24 new observation rooms
  • 4 trauma/resuscitation rooms (2 of which are new)
  • Level One Trauma Center
  • Fellowship training in Pediatric Emergency Medicine
  • Actively engaged and nationally recognized in clinical research
  • In-room registration process to decrease waiting room time


Emergency Medicine

Blake Bulloch, MD, Medical Staff Section Chief

Jared Muenzer, MD, Associate Director, Clinical Operations

Keren Cedillos, MD

Toni Gross, MD

Emiliano Higuera, MD

Mark Hostetler, MD

Thomas McConahay, MD

Jon McGreevy, MD

Theresa Murdock, MD

Anthony Pickett, MD

Tamara Pottker, MD

Chris Ramsook, MD

Lalitha Ravi, MD

Karen Scharlatt, DO

Kopal Seth, MD 

Robert Yniguez, MD

Stephanie Zimmerman, MD


Karem Colindres, DO

Christina Conrad, DO

Vasanth Coorg, MD

William Luciano, MD

Kunal Shah, MD

Ben Thompson, MD

Zebulon Timmons, MD

Nurse Practitioners

Rebecca Brown, PNP

Tara Crandall, NP

Karen Freemen, PNP

Elizabeth Gallagher, PNP

Melanie Gamble, NP

Lisa Ann Keller, PNP

Rebecca Koo, NP

Sean Kline, PNP

Sharen Schaeffer, PNP

Nancy Shaver, PNP

Joyce Tetreault, PNP

Carol Thrall, PNP

Physician Assistants

Latisha Bernier, PA

Christine Heise, PA

Bernadette McNally, PA

Urgent Care

Joseph Bouvier, MD

Jennifer Geyer, MD

Kelle Shutter, MD

Ryan Young, MD

Programs and Services

  • Children are triaged by an experienced pediatric ED nurse within minutes of arrival.
  • A Community Physician Referral Line available 24/7 for direct communication with ED staff.
  • Experts in all areas of emergency pediatrics who can clearly communicate medical information to families and their private physicians.
  • Continuous efforts to minimize waiting times from the moment of entry to discharge.
  • ED staff will stabilize, treat and discharge less acutely ill or injured children who can be effectively cared for outside the hospital. This will allow the sickest children who desperately need a hospital bed to obtain one.
  • An observation area where children requiring reevaluation prior to discharge may be continuously reassessed for improvement in clinical condition.
  • A customized medical follow-up system based on family preferences.
  • An environment specifically designed with child-friendly features to ease the fear and anxiety of children and their parents.
  • In-room registration for high acuity patients.
  • Conscious sedation for painful procedures.
  • TV, books and age-appropriate activities in each exam room along with telephones for parents and guardians.
  • Child life specialist that will work with ED patients and families.


(602) 546-1900

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