Meet our Team

Our LEADERSHIP TEAM

REPI has been locally governed since it’s inception. Our board structure has changed over the years as we have grown, but our democratic flavor has remained consistent. The Board is elected by REPI shareholders and serve either a one or two year term. Any REPI shareholder can run for these positions.

Currently, the REPI board consists of President, Vice President, Chief Operations Officer, Chief Financial Officer, and Chief Medical Officer. These five members meet frequently to make sure the inner working of REPI are running smoothly.

Board of Directors

Christopher Johnson, MD | President

Dr. Chris Johnson is a native of Richmond, VA. He completed medical school at VCU/MCV and then moved to Durham, NC for an Emergency Medicine residency at Duke University Medical Center. After completing those three years, he then went on to do a Pediatric Emergency Medicine fellowship at the UNC/WakeMed program in Chapel Hill and Raleigh, NC. After completing his fellowship, Dr. Chris Johnson spent a year working with Wake Emergency Physicians, PA while his wife completed her neonatology fellowship at UNC. Chris joined Richmond Emergency Physicians, Inc. in 2011 when he and his wife moved back to Richmond. He also currently serves as the Medical Director of the Pediatric Emergency Department at St. Mary’s Hospital. In his free time Chris enjoys photography and spending time outside in the James River Park System with his wife and two boys.

Cara D. Marks, MD | Vice President

Dr. Marks is board certified by the American Board of Emergency Medicine.  In addition to her clinical duties, Dr. Marks serves as the Executive Vice President of REPI. She has been working at St. Mary’s hospital for over 18 years. 

Dr. Marks received her medical degree from Wake Forest University School of Medicine and completed her Emergency Medicine residency at the University of Maryland.  She and her husband Jon, also a physician, keep busy raising their four children.

William Azie, MD | Chief Medical Officer

Dr. Azie is board certified by The American Board of Emergency Medicine. In addition to his clinical duties, Dr. Azie has been REPI’s Medical Director since 2009. He is an expert in quality control and is instrumental in the development, coordination and review of many of the performance metrics used to ensure the delivery of exceptional medical care.

Dr. Azie received his B.S. in Zoology from Howard University in Washington, DC. He went on to receive his M.D. from Howard University as well. Dr. Azie completed his Residency at Christiana Care Health System in Newark, DE.

Dr. Azie is a member of the American College of Emergency Physicians and the American Academy of Emergency Medicine. He has a history of “giving back” through volunteering including work at the Loudon Free Clinic where he assisted in caring for the homeless, disabled and chronically ill and has donated time as a Mentor and Counselor to the “Kids Safe” program working with impoverished, inner-city children.

Dustin Anderson, MD, NRP | Chief Operations Officer

Dr. Dusty Anderson is board certified by the American Board of Emergency Medicine. A native of Richmond, VA, He received his B.S. from Longwood University. He completed medical school at VCU/MCV and completed his Emergency Medicine residency at VCU Medical Center. After completing his residency, he joined Richmond Emergency Physicians, Inc., in 2016. Dusty’s interests are in Prehospital/EMS and education. He is the Operational Medical Director for Colonial Heights Fire and EMS, Virginia State Police Operational Medical Unit, and the Paramedic program at ECPI University.

He is a member of the American College of Emergency Physicians, the American Academy of Emergency Medicine, National Association of EMS Physicians, Instructor for AHA, and NAEMT. He was awarded the ODEMSA Award for Physician with Outstanding Contribution to EMS in 2018.

In his free time Dusty enjoys golf, saltwater fishing and spending time with his wife and two daughters.

Jennifer Hoyt, MD | Chief Financial Officer

Dr. Jennifer Hoyt is board certified by the American Board of Emergency Medicine. In addition to her clinical duties, Dr. Hoyt serves as the Chief Financial Officer of REPI.

Dr. Hoyt received her B.S. in Engineering Science and Mechanics and her M.S. in Engineering Mechanics from Virginia Tech. She then received her medical degree and completed an Emergency Medicine residency at Virginia Commonwealth University. She has been with REPI since 2012. She and her husband, Del, stay busy raising their 5 children.

Christopher Johnson, MD | President

Dr. Chris Johnson is a native of Richmond, VA. He completed medical school at VCU/MCV and then moved to Durham, NC for an Emergency Medicine residency at Duke University Medical Center. After completing those three years, he then went on to do a Pediatric Emergency Medicine fellowship at the UNC/WakeMed program in Chapel Hill and Raleigh, NC. After completing his fellowship, Dr. Chris Johnson spent a year working with Wake Emergency Physicians, PA while his wife completed her neonatology fellowship at UNC. Chris joined Richmond Emergency Physicians, Inc. in 2011 when he and his wife moved back to Richmond. He also currently serves as the Medical Director of the Pediatric Emergency Department at St. Mary’s Hospital. In his free time Chris enjoys photography and spending time outside in the James River Park System with his wife and two boys.

Cara D. Marks, MD | Vice President

Dr. Marks is board certified by the American Board of Emergency Medicine.  In addition to her clinical duties, Dr. Marks serves as the Executive Vice President of REPI. She has been working at St. Mary’s hospital for over 18 years. 

Dr. Marks received her medical degree from Wake Forest University School of Medicine and completed her Emergency Medicine residency at the University of Maryland.  She and her husband Jon, also a physician, keep busy raising their four children.

William Azie, MD | Chief Medical Officer

Dr. Azie is board certified by The American Board of Emergency Medicine. In addition to his clinical duties, Dr. Azie has been REPI’s Medical Director since 2009. He is an expert in quality control and is instrumental in the development, coordination and review of many of the performance metrics used to ensure the delivery of exceptional medical care.

Dr. Azie received his B.S. in Zoology from Howard University in Washington, DC. He went on to receive his M.D. from Howard University as well. Dr. Azie completed his Residency at Christiana Care Health System in Newark, DE.

Dr. Azie is a member of the American College of Emergency Physicians and the American Academy of Emergency Medicine. He has a history of “giving back” through volunteering including work at the Loudon Free Clinic where he assisted in caring for the homeless, disabled and chronically ill and has donated time as a Mentor and Counselor to the “Kids Safe” program working with impoverished, inner-city children.

Dustin Anderson, MD, NRP | Chief Operations Officer

Dr. Dusty Anderson is board certified by the American Board of Emergency Medicine. A native of Richmond, VA, He received his B.S. from Longwood University. He completed medical school at VCU/MCV and completed his Emergency Medicine residency at VCU Medical Center. After completing his residency, he joined Richmond Emergency Physicians, Inc., in 2016. Dusty’s interests are in Prehospital/EMS and education. He is the Operational Medical Director for Colonial Heights Fire and EMS, Virginia State Police Operational Medical Unit, and the Paramedic program at ECPI University.

He is a member of the American College of Emergency Physicians, the American Academy of Emergency Medicine, National Association of EMS Physicians, Instructor for AHA, and NAEMT. He was awarded the ODEMSA Award for Physician with Outstanding Contribution to EMS in 2018.

In his free time Dusty enjoys golf, saltwater fishing and spending time with his wife and two daughters

Jennifer Hoyt, MD| Chief Financial Officer

Dr. Jennifer Hoyt is board certified by the American Board of Emergency Medicine. In addition to her clinical duties, Dr. Hoyt serves as the Chief Financial Officer of REPI.

Dr. Hoyt received her B.S. in Engineering Science and Mechanics and her M.S. in Engineering Mechanics from Virginia Tech. She then received her medical degree and completed an Emergency Medicine residency at Virginia Commonwealth University. She has been with REPI since 2012. She and her husband, Del, stay busy raising their 5 children.

Medical Directors

Jeffrey Mason, MD | Medical Director, St Mary's Hospital

Dr. Mason grew up in New Jersey just outside Philadelphia before going to Washington, DC to earn a BA in Philosophy at the George Washington University.  He graduated medical school from the University of Maryland in 2006 after taking a year off of school to spend 7 months bicycling around the country.  After completing his residency in Emergency Medicine at the Hospital of the University of Pennsylvania, Dr. Mason and his wife moved to Arizona where he worked for two years on the Navajo Reservation.  They moved to Richmond after their first son was born so that they could be closer to family. Six years and four beautiful additional children later, they couldn’t imagine themselves living or working anywhere else.

William Azie, MD | Medical Director, St. Francis Medical Center

Dr. Azie is board certified by The American Board of Emergency Medicine. In addition to his clinical duties, Dr. Azie has been REPI’s Medical Director since 2009. He is an expert in quality control and is instrumental in the development, coordination and review of many of the performance metrics used to ensure the delivery of exceptional medical care.

Dr. Azie received his B.S. in Zoology from Howard University in Washington, DC. He went on to receive his M.D. from Howard University as well. Dr. Azie completed his Residency at Christiana Care Health System in Newark, DE.

Dr. Azie is a member of the American College of Emergency Physicians and the American Academy of Emergency Medicine. He has a history of “giving back” through volunteering including work at the Loudon Free Clinic where he assisted in caring for the homeless, disabled and chronically ill and has donated time as a Mentor and Counselor to the “Kids Safe” program working with impoverished, inner-city children.

Randall Geldreich, MD | Medical Director, St. Mary's Pediatric Emergency Department

Dr. Geldreich grew up in New Jersey before going to Randolph-Macon College to earn a BS with honors in Chemistry and Biology.  He graduated medical school from the University of Virginia in 2001.  After completing a combined residency in internal medicine-pediatrics at the University of Rochester Strong Memorial Hospital, he subsequently completed a residency in Emergency Medicine at Virginia Commonwealth University.  He is board certified in four specialties:  pediatrics, emergency medicine, emergency medical services (EMS), and internal medicine.  He joined REPI in 2009  and has held the roles of pediatric medical director (2008-2011), critical care transport medical director (2011-present), CFO and others.  As he was a former paramedic, he remains actively engaged in EMS with several local EMS agencies too.  As an advocate for emergency medicine, he has served on the Virginia ACEP Board of Directors since 2017.

Gregory Lamb, MD| Medical Director, Bon Secours Short Pump Emergency Center

Dr. Lamb is board certified by The American Board of Emergency Medicine. In addition to his clinical duties, Dr. Lamb serves as Medical Director at Short Pump Emergency Center and Assistant Medical Director at St. Mary’s Hospital Emergency Department. He received his M.D. from Virginia Commonwealth University. Dr. Lamb completed his Emergency Medicine Residency at the University New Mexico in Albuquerque, NM. He has two children and enjoys running, camping, and reading.

Tim Titchner, MD | Medical Director, Westchester Emergency Center

Dr. Titchner is board certified by The American Board of Emergency Medicine. In addition to his clinical duties, Dr. Titchner serves as Medical Director at Westchester Emergency Center and Assistant Medical Director at St. Francis Medical Center Emergency Department. He received his M.D. from Virginia Commonwealth University. Dr. Titchner completed his Emergency Medicine Residency and a Sports Medicine Fellowship at Allegheny General Hospital in Pittsburgh. He has two children and enjoys running and reading.

Douglas Nassif, MD | Assistant Medical Director, St. Mary's Pediatric Emergency Department

Douglas Nassif comes to Richmond from his home state of Michigan. There he attended Michigan State University, graduating in 2005. He then moved to Washington, DC where he graduated from the Howard University College of Medicine in 2009. Dr. Doug Nassif then completed a residency in Pediatrics at Inova Children’s Hospital in Fairfax, followed by a fellowship in Pediatric Emergency Medicine in Detroit at the Children’s Hospital of Michigan. He then joined Richmond Emergency Physicians, Inc. in 2016 and took over as the Medical Director of the Pediatric Emergency Department at St. Mary’s Hospital in 2019. In his spare time, he enjoys traveling, trying new restaurants, and competitive bocce ball.

Our PHYSICIANS

Throughout its historical relationship with Bon Secours, REPI has a proven track record of providing the highest quality emergency medicine services. We have developed and implemented a rigorous set of performance metrics to ensure that our physicians meet or exceed the highest standards in the practice of emergency medicine. These services have been provided without interruption and without regard to the patient’s ability to pay.

Dustin Anderson, MD, NRP

Board Certified: Emergency Medicine

Residency: Virginia Commonwealth University Health

Medical School: Medical College of Virginia

Undergraduate: Longwood University

William N. Azie, MD

Board Certified: Emergency Medicine

Residency: Christiana Care Health System

Medical School: Howard University, Washington DC.

Undergraduate: Howard University, Washington DC; Bachelor of Science in Biology

John Coyner, MD

Board Certified: Emergency Medicine

Residency: Louisiana State University

Medical School: Marshall University School of Medicine

Undergraduate: Washington College, Bachelor of Science in Biology

Court Crenshaw, DO

Residency: Case Western MetroHealth Cleavland Clinic

Medical School: Philadelphia College of Osteopathic Medicine

Undergraduate: University of Mary Washington, Bachelor of Science in Biology

Zachary Dillon, MD

Board Certified: Emergency Medicine

Residency: Lehigh Valley Health Network

Medical School: Saint George’s University  School of Medicine

Undergraduate: Virginia Commonwealth University, Bachelor of Science in Biology

Francis J. Diskin, MD, MS, NRP

Board Certified: Emergency Medicine

Residency Attended: Virginia Commonwealth University Medical College of Virginia

Medical School Attended: Virginia Commonwealth University Medical College of Virginia

Graduate Education: Master of Science, Biochemistry and Molecular Biology, Virginia Commonwealth University Medical College of Virginia

Undergraduate Education: Bachelor of Science, Virginia Tech

R. Matthew Dumas, MD

Board: Emergency Medicine, Board Eligible

Residency: Central Michigan University College of Medicine

Medical School: Ross University School of Medicine

Undergraduate: Hampden-Sydney College; Bachelor of Science in Biology

Jill Eckenberger, MD

Board Certified: Emergency Medicine (ABEM)

Residency: Allegheny General Hospital

Medical School: Virginia Commonwealth University School of Medicine

Undergraduate: Virginia Commonwealth University; Bachelor of Science in Biology

Randall Geldreich, MD

Board Certification: Internal Medicine, Pediatrics and Emergency Medicine

Residency: Virginia Commonwealth University Medical College of Virginia, Emergency Medicine Residency

Residency: University of Rochester Strong Memorial Hospital Internal Medicine and Pediatrics Residency

Medical School: University of Virginia

Undergraduate: Randolph-Macon College

J Patrick Gill, MD

Board Certified: Emergency Medicine

Residency: University of Kentucky

Medical School: Virginia Commonwealth University Medical College of Virginia

Undergraduate: Virginia Tech; Bachelor of Science in Biology

Richard Gill, MD

Board Certified: Emergency Medicine

Residency: Emory University

Medical School: Virginia Commonwealth University

Graduate School: Virginia Commonwealth University, M.S. Physiology

Undergraduate: Virginia Tech University, B.S. Biology

Grayson Goldman, DO

Board Certified: Emergency Medicine

Residency: Conemaugh Memorial Medical Center

Medical School: Lincoln Memorial University-DeBusk College of Osteopathic Medicine

Graduate School: Master of Business Administration; Lincoln Memorial University

Undergraduate: Bachelor of Science in Health Sciences with a concentration in Public Health Education; James Madison University

Catherine Henry, MD

Board Certified: Emergency Medicine

Fellowship: Emergency Medical Services at University of Virginia

Residency: University of Virginia

Medical School: Texas Tech University Health Sciences Center

Undergraduate: Bachelor of Arts from Johns Hopkins University

Pearl Horng, MD

Board Certified: Emergency Medicine

Residency: Christiana Care Health Services

Medical School: Pennsylvania State College of Medicine

Undergraduate: University of Maryland

Jennifer Hoyt, MD

Board Certified: Emergency Medicine

Residency: Virginia Commonwealth University

Medical School: Virginia Commonwealth University

Graduate School: Virginia Tech, Engineering Mechanics

Undergraduate: Virginia Tech, Engineering Science and Mechanics

Chris Hughes, DO

Board Certified: Emergency Medicine (AOBEM)

Residency: Conemaugh Memorial Medical Center

Medical School: Edward Via Virginia College of Osteopathic Medicine

Undergraduate: Freed-Hardeman University; Bachelor of Science and Chemistry

Christopher Johnson, MD

Board Certified: Emergency Medicine and Pediatric Emergency Medicine

Fellowship: University of North Carolina; Hospitals for Pediatric Emergency Medicine

Residency: Duke University Medical Center

Medical School: Virginia Commonwealth University / Medical College of Virginia

Undergraduate: Washington & Lee University; Bachelor of Science in Biology

Warren Jones, DO

Board Certified: Emergency Medicine

Residency: Wake Forest University Baptist Medical Center, Winston-Salem, NC

Medical School: Edward Via College of Osteopathic Medicine – Virginia Campus, Blacksburg, VA

Undergraduate: Bachelor of Science in Biology, minor in Chemistry, Appalachian State University, Boone, NC

Daniel Knott, MD

Board Certified: Emergency Medicine

Residency: Wake Forest Baptist Medical Center

Medical School: Virginia Commonwealth University / Medical College of Virginia

Undergraduate: BS Biological Sciences & BS Psychology, Virginia Tech

Amrita Lalvani, MD

Board Certified: Emergency Medicine

Residency: Temple University Hospital

Medical School: Eastern Virginia Medical School

Graduate School: Masters of Science, Physiology and Biophysics, Georgetown University

Undergraduate: Bachelor of Science in Biology, University of Virginia

Gregory Lamb, MD

Board Certified: Emergency Medicine

Residency Attended: University of New Mexico

Medical School: Virginia Commonwealth University Medical College of Virginia 

Undergraduate: Bachelor of Arts in Biochemistry, Eastern Mennonite University

Jeff Leary, MD

Board Certified: Emergency Medicine

Residency: University of Virginia

Medical School: Virginia Commonwealth University

Undergraduate: James Madison University

Cara Marks, MD

Board Certified: Emergency Medicine

Residency:  University of Maryland School of Medicine.

Medical School: Wake Forest School of Medicine

Undergraduate: Villanova University, Bachelor of Science in Biology

Jeffrey Mason, MD

Board Certified: Emergency Medicine

Residency: University of Pennsylvania

Medical School:  University Of Maryland School of Medicine

Undergraduate:  George Washington University, Bachelor of Arts In Philosophy

Jeffrey Morgan, MD

Board Certified: Emergency Medicine

Residency in Emergency Medicine: San Antonio Uniformed Services Health Education Consortium

Medical School:  University Of Louisville

Undergraduate:  University of North Carolina at Wilmington, Bachelor of Science in Biology

Douglas Nassif, MD

Board Certified: Pediatrics, Pediatric Emergency Medicine

Residency: Inova Children’s Hospital

Fellowship: Children’s Hospital of Michigan; Pediatric Emergency Medicine

Medical School: Howard University College of Medicine

Undergraduate: Michigan State University; Human Biology and Physiology

Imani Orgill, MD

Board Certified: Emergency Medicine, 2016

Residency: Yale University

Medical School: Vanderbilt University Medical School 

Undergraduate: Princeton University; Bachelor of Arts in Chemistry 

Robert Powell, MD

Board Certified : Emergency Medicine

Residency: Riverside Hospital/MCV

Medical School : Medical College of Virginia

Undergraduate : Virginia Polytechnic Institute; Bachelor in Biology

Erik Schobitz, MD

Board Certified: Pediatrics and Pediatric Emergency Medicine (ABP)

Fellowship in Pediatric Emergency Medicine: Children’s Hospital of the Kings Daughters – Norfolk, VA

Residency in Pediatrics: San Antonio Uniformed Services Health Education Consortium (BAMC/Wilford Hall) – San Antonio, TX

Medical School: Doctor of Medicine from Eastern Virginia Medical School – Norfolk, VA

Undergraduate: Bachelor of Science in Biology from the College of William & Mary – Williamsburg, VA

Neil Sreshta, MD

Board Certified: Emergency Medicine

Residency: Yale University School of Medicine

Medical School: Northeast Ohio Medical University

Undergraduate: Kent State University

Gary Taylor, MD

Board Certified: Emergency Medicine

Residency: Norfolk General

Medical School: University of South Alabama

Undergraduate: University of South Alabama, Bachelor of Arts In Chemistry

Timothy Titchner, MD

Board Certified: Emergency Medicine, Sports Medicine

Fellowship: Allegheny General Hospital

Residency: Allegheny General Hospital

Medical School: Virginia Commonwealth University

Undergraduate: University of Pittsburgh; BS Chemistry

Full-Time Advanced Care Practitioners

At REPI, we pride ourselves in a strong team of ACPs. Our PAs and NPs are truly part of REPI’s teamwork dynamic. This shows in our strong retention and many of our ACPs have been with REPI for years. We are proud to have such a great group of ACPs.

Amy Fleming Hoyt, NP

Graduate School: Virginia Commonwealth University

Undergraduate: Hampton University College of Virginia Beach

Keith Hart, NP

Graduate School: Virginia Commonwealth University

Undergraduate: James Madison University

Adrian Johnson, PA-C

Graduate School: James Madison University

Undergraduate: Bridgewater College

Eleanor Koerner, PA-C

Graduate School: Jefferson College of Health Sciences

Undergraduate: St. Mary’s College of Maryland

Pamela Martin, NP

Graduate School: University of Virginia

Undergraduate: Lynchburg College

Kelsey McQuaid, PA-C

Board Certification: National Commission on Certification of Physician Assistants

Graduate School: South University – Master of Science in Physician Assistant

Undergraduate: College of Charleston – Bachelor of Science in Public Health

Lori Muoio, NP

Graduate School: Russell Sage College

Undergraduate: Niagara University

Emily Powers, PA-C

Graduate School: James Madison University

Undergraduate: University of Virginia

Kathleen Richio, NP

Graduate School: Virginia Commonwealth University

Undergraduate: Neumann College

Jessica Snow, NP

Graduate School: Arizona State University

Undergraduate: Georgetown University

Abigail Stone, PA-C

Graduate School: James Madison University

Undergraduate: James Madison University

Lindsay Warren, PA-C

Graduate School: Eastern Virginia Medical School

Undergraduate: University of Richmond

Marianna Wills, PA-C

Board Certification: National Commission on Certification of Physician Assistants

Graduate School: Jefferson University of Health Sciences/Radford University Carilion – Master of Science in Physician Assistant

Undergraduate: Randolph-Macon College – Bachelor of Science

Interested in joining our team?

Find open positions at Richmond Emergency Physicians.