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ERAS#: 1100500218

NRMP#: 1877110C0

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Welcome letter

Gregory Guldner, MD, MS, FACEPI would like to personally and warmly welcome you to the excitement of a unique, three-year emergency medicine residency program in Southern California. We are excited to match another group of talented residents to join our experienced academic attendings in a friendly supportive environment that has both high patient volume and very high acuity.

Riverside Community Hospital is a 478-bed level 1 trauma center and a comprehensive thrombectomy-capable stroke center. Our beautiful campus lies conveniently in the heart of downtown Riverside 50 miles east of Los Angeles and 50 miles north of Laguna Beach.

RCH is a referral center for a higher level of care to the Inland Empire. Our expansive emergency department sees over 120,000 patients a year and is a regional STEMI, stroke, sepsis, and trauma center. We are the only Joint Commission Certified Thrombectomy Capable Stroke Center in the western United States (and the second in the nation).

Specialty services include trauma surgery, general surgery, vascular surgery, plastic surgery, hand surgery, otolaryngology, orthopedic surgery, neurosurgery, cardiothoracic surgery, bariatric surgery, radiology, interventional radiology, nephrology, infectious disease, neurology (including acute stroke and neuro-interventional), interventional cardiology, internal medicine, pediatrics, NICU and neonatology, ophthalmology, hematology/oncology, radiation oncology, psychiatry, obstetrics and gynecology, and gynecologic oncology.

The UCR School of Medicine represents the newest expansion of the University of California system, joining a prestigious group of medical educators in our state. As the affiliated emergency medicine residency program for UCR, we look forward to a long tradition of excellence in patient care and medical education. Emergency Medicine residents will train directly with clinical professors and instructors from UCR and will mentor UCR medical students. The advanced simulation center at the UCR campus, located just 2 miles away, provides outstanding training in both cognitive and procedural skills.

Our unique program combines high-level state-of-the-art care with the real-world practice of a highly efficient community hospital. Residents from our program are among the best in the nation, having learned the newest inpatient care coupled with the ability to handle the realities of high volume emergency departments. Graduates complete the program with enormous procedural confidence given the patient volume and acuity. Our residents are superbly positioned to enter the workforce and make an important impact on emergency care.

At the RCH/UCR emergency medicine residency, you will thrive amid university level health care with exceptional patient volume in a friendly and supportive hospital. We’ll take care of you, so you can take care of patients.

Gregory Guldner, MD, MS, FACEP
Program Director
Riverside Community Hospital / University of California Riverside
Emergency Medicine Residency

Interactive Program Information

Interactive Program Booklet

Program PDF

About our program

Welcome to the UCR/RCH EM Residency. Our program deeply believes that balancing hard work and wellness, both inside and outside the hospital is the integral principle for thriving. While we are one of the few remaining 3-year programs in the beautiful state of California, 3 years is still a significant portion of your life. Whether in the resuscitation bay, pediatric unit, or didactics center, each experience is carefully crafted for your development into an excellent EM doc and, just as importantly, a happy and fulfilled human being.

As one of the busiest emergency departments in California, RCH/UCR offers exceptional levels of exposure to diverse pathology, patients requiring critical care, and opportunities for mastering procedures. We are proud that our EM program not only provides a high volume and acuity ED, but it also offers kind people, a resident centric culture, and vast opportunities to pursue your interests.

As a relatively new program, we offer unique opportunities to shape your own education and find new paths that suit your specific career goals. And speaking of opportunity, we would love the chance to meet you during the interview season, in person or virtually, to more fully delve into the unique features inherent to our program and of course learn all about you! Thank you for your interest in RCH/UCR. The chiefs, administration, faculty, and residents are fully committed to your long term success. Please do not hesitate to reach out. We are happy to help you achieve your goals.

In the meantime, enjoy browsing through just a few of the many unique features that make RCH/UCR’s EM program great:

Margo Kaller, Ashkan Morim, Devan Pandya

Mission statement

The Emergency Medicine Residency program’s mission is to develop the next generation of physicians and physician leaders. As a part of HCA Healthcare, we are driven by a single mission: Above all else, we are committed to the care and improvement of human life.

This program is designed to offer residents a rewarding, educational environment where residents are provided individualized learning opportunities by faculty and staff who support and sustain one another throughout quality care delivery. Our faculty are committed to ensuring the residents' clinical experience and educational needs are fulfilled while expanding residents’ perspectives to be inclusive of cultures, values, and ideals.

List of leadership and faculty

  • Emergency Medicine Program Director: Gregory Guldner, MD, MS, FACEP
  • Jason An, MD
  • Curtis Knight, MD
  • Steven Kim, MD
  • Stephen Patterson, MD
  • Tommy Kim, MD FAAP FACEP
  • Barbara Blasko, MD
  • Chelsea Cosand, MD
  • Robbi Dunn-Dixon, MD
  • Eva Tovar Hirashima, MD, MPH
  • Allison Woodall, MD
  • Eddie Magee, MD, MPH
  • Samuel Zidovetzki , MD, MPH
  • Lucas Friedman, MD, M.Ed.
  • Joshua Batt, DO
  • Ryan Brenchley, MD
  • John Costumbrado, MD MPH
  • Nhan Do, MD
  • Sassan Ghassemzadeh, MD
  • Eugene Hu, MD
  • Michael Kang, MD
  • Eduardo Lam, MD
  • Daniel Ng, MD
  • David Tito, MD
  • Matt Underwood, MD
  • David Wagner, MD
  • Kelvin L. Wong, MD
  • Joseph Fargusson, MD
  • Eric Teacher, MD
  • Marcus Voth, MD

Program overview

Riverside Community Hospital is a regional medical affiliate with the University of California, Riverside School of Medicine (UCR-SOM) and a referral center for higher levels of care for many different service lines. Our residency program will position you for an excellent career in healthcare.

We have the resources and facilities necessary to provide you with a comprehensive experience, preparing you for a lifetime of service and success in the medical field. We're based in beautiful and sunny Southern California, giving our residents access to an incredible environment and residency experience. To learn more, call Riverside Community Hospital today!

Riverside Community Hospital

At our graduate medical education program at Riverside Community Hospital, we're committed to training the healthcare physicians of tomorrow with excellence. Our team of educators and practitioners are highly skilled and passionate about what we do. By the end of the training, our residents will be clinically astute, academically exceptional, altruistic, and committed to the highest professional standards.

Curriculum and rotation schedule

RCH/UCR Emergency Medicine Curriculum


  • ED/Peds ED (5 blocks)
  • EM Orientation (1 block)
  • ED Adventures (1 block)
  • ED Ultrasound (1/2 block)
  • Trauma / Acute Care Surgery (1 block)
  • Intensive Care Medicine (MICU/SICU) (1 block)
  • Emergency Orthopedics (1 block)
  • Cardiology (1 block)
  • Anesthesia (1 block)
  • Obstetrics (1/2 block)


  • ED/Peds ED (7 blocks)
  • MICU/SICU (1½ blocks)
  • PICU at Riverside University Health System (1 block)
  • Children’s Hospital Los Angeles (1 block)
  • Neuro ICU (1/2 block)
  • EMS / Pre-hospital care (1 block)
  • Elective (1 block)


  • ED/Peds ED (10½ blocks)
  • Children’s Hospital Orange County ED (1 block)
  • Elective (1 block)
  • ED Ultrasound (1/2 block)


We understand how stressful the first year of training in any residency can feel. At RCH/UCR we want our first-year residents to work hard and grow, but to do so in a very supportive environment with help easily available when they need it. Our entire class of PGY1s start in the ED for July where they can begin to build basic knowledge and confidence. They then move on to the off-service rotations interspersed with ED months. Residents have superb instruction in hospitalist medicine, obstetrics and gynecology, cardiology, intensive care medicine, trauma and acute care surgery, orthopedic surgery, and anesthesia. They will return to the ED for the first week of June for advanced training prior to completing their first year of residency.

Absolutely. HCA is one of the largest healthcare organizations nationwide and owns over 184 hospitals and numerous outpatient settings. Vituity staffs the emergency department at RCH and is a leading provider of acute care management with over 250 practices throughout the United States. We would be delighted to have qualified residents continue with HCA and Vituity after graduation.

Riverside Community Hospital sees over 26,000 pediatric patients a year, including critically ill and injured children. A busy NICU provides on-site neonatology attendings to assist with our littlest patients when needed. Residents train with our core faculty, including Pediatric Emergency Medicine and Pediatric Intensive Care boarded attending physicians. Residents rotate 6 weeks at the Pediatric ICU at Riverside University Health Systems - Medical Center, working directly with pediatric ICU attendings to manage critically ill and injured children. PGY3 residents rotate at Children’s Hospital Orange County with an annual volume of 91,000 pediatric patients. Multiple year-round simulations held both during our weekly didactic sessions and at the UCR simulations center allow for simulated experience with critically ill and injured pediatric patients.

With 120,000+ patients a year coming through our ED we have an abundance of procedures from simple laceration repair, to joint reductions, procedural sedation, central lines, intubation, chest tube placement, and ED thoracotomy.

Community hospitals clearly differ from university hospitals in many ways. First, at Riverside Community Hospital our 120,000+ ED patients benefit from impressive efficiencies not often found in other settings.

Patients are seen by a provider in an average of 8 minutes from check-in. Radiology and laboratory studies are completed and resulted within 90 minutes. Our length of stay for discharged patients is under 3 hours, low acuity patients are discharged in under 90 minutes, and admitted patients leave the ED as an inpatient in under 5 hours.

All this means residents can see more cases during a shift and better learn from any one case because data needed for decisions returns rapidly. Residents will also benefit from learning how to run an efficient emergency department. Second, community hospitals also tend to be more collegial with less academic hierarchy and adversarial interactions.

Our ED providers are highly regarded at our hospital with emergency physician attendings holding the position of chief of staff and chair of the medical staff QI review committee among many others. You will find consultants are generally happy to help and appreciate the emergency department providers taking care of their patients.

Third, the vast majority of emergency physicians will graduate residency and work in community hospitals. Understanding the community hospital's background, policies, and protocols will allow for a smoother transition after graduation. In addition to being a community hospital, RCH has become a major university teaching hospital with extremely high patient volume, and serves as a major referral center for complicated patients from all over the Inland Empire.

ED Ultrasound is used extensively at Riverside Community Hospital and residents use ultrasound from the first month of residency. Our fellowship-trained ED ultrasound directors guide residents through the program from basic to advanced ultrasound skills. Those wishing to obtain an RDMS designation have ample opportunity to obtain the required number of studies. Ultrasound simulation and online education help develop a robust understanding of this critical ED skill.

The University of California Riverside campus located only 10 minutes away has a fully developed simulation lab with high fidelity simulation that allows for interactive scenarios, procedures, team management training, and immediate feedback while reviewing audio-video recordings of the simulation.

Residents rotate through the simulation center on a routine basis. We are in the final stages of completing the construction of a building dedicated to GME with over 20,000 square feet dedicated solely to GME with an auditorium, simulation lab, sleep rooms, and team rooms.

No. While opportunities abound to partake in our region’s aeromedicine programs, residents are not required to fly.

Yes, with the residency program director’s written permission.