Exceptional Emergency Care
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EMERGENCY MEDICINE PHYSICIANS
Nathan MacDonald, MD, FACEP
President
Merrimack Valley Emergency Associates
Immediate Past-President of the Medical Staff
Lowell General Hospital
Medical School
University of Massachusetts
Residency
University of Massachusetts
Board Certification
Emergency Medicine
Joined MVEA
1999
Jose Ponce-Rios, MD, FAAP
Pediatric Medical Director
Emergency Department
Lowell General Hospital
Medical School
University of Puerto Rico
Residency
Floating Hospital for Children/Tufts University Medical Center
Fellowship
Phoenix Children's Hospital
Board Certification
General Pediatrics
Pediatric Emergency Medicine
Clinical Interests
Sepsis, the injured child, how language barriers and cultural differences affect patient care
Joined MVEA
2017
David Druga, MD
Medical School
Boston University School of Medicine
Residency
Boston Medical Center
Joined MVEA
2020
Grace Garcia, MD
Medical School
Harvard Medical School
Residency
Boston Medical Center
Joined MVEA
2019
Scott Glazier, MD
Medical School
Boston University School of Medicine
Residency
University of Massachusetts Medical Center
Fellowship
Massachusetts General Hospital
Emergency Medicine Ultrasound
Board Certification
Emergency Medicine
Joined MVEA
2020
Susan Brough, MD
Medical School
Eastern Virginia Medical School
Residency
University of Massachusetts
Board Certification
Emergency Medicine
Joined MVEA
2006
Francesco Corvi, MD
Medical School
University of Perugia, Italy
Residency
Berkshire Medical Center
Board Certification
Internal Medicine
Emergency Medicine
Joined MVEA
1996
Benjamin Grimmnitz, MD
Medical School
Icahn School of Medicine at Mount Sinai
Residency
Boston Medical Center
Board Certification
Emergency Medicine
Joined MVEA
2017
Leslie Halpern, MD
Medical School
Rush Medical College
Residency
Boston Medical Center
Board Certification
Emergency Medicine
Joined MVEA
2016
Susan Ly, MD
Co-Director, Emergency Preparedness & Disaster Management
Medical School
New York Medical College
Residency
University of Massachusetts
Fellowship
University of Massachusetts
Disaster Management
Clinical Interests
Emergency Preparedness & Disaster Management
Joined MVEA
2012
Richard Lyons, MD, FACEP
Medical School
Georgetown University
Internship
USPHS Hospital, New Orleans
Residency
University Hospital - Jacksonville
Board Certification
Emergency Medicine
Joined MVEA
2009
Lucia Modesti, MD
Medical School
University of California at San Francisco
Residency
University of California at San Diego
Board Certification
Emergency Medicine
Joined MVEA
2013
Kimberly Morton, MD
Medical School
University of Massachusetts
Residency
Christiana Care Health Services
Board Certification
Emergency Medicine
Joined MVEA
2007
Sean Mosharo, MD, FACEP
Medical School
Wayne State University
Residency
University of Massachusetts
Board Certification
Emergency Medicine
Clinical Interests
Toxicology, Ultrasound
Joined MVEA
2010
Ravi Murthy, MD
Medical School
Chicago Medical School
Residency
Boston Medical Center
Board Certification
Emergency Medicine
Joined MVEA
2013
Marc Roy, MD, FACEP, FAAEM
Medical School
University of Vermont
Residency
Tufts University/Baystate Medical Center
Board Certification
Emergency Medicine
Joined MVEA
2013
David Sciacca, MD, FACEP
Medical School
Tufts University
Internship
Georgetown University Hospital
Residency
John H. Stroger Jr. Hospital of Cook County
Board Certification
Emergency Medicine
Clinical Interests
Acute CHF, PE, emergency airway management
Joined MVEA
2009
Katja Von Tiesenhausen, MD
Medical School
University of Alabama
Residency
Boston University Medical Center
Internal Medicine
Boston University Medical Center
Emergency Medicine
Board Certification
Internal Medicine
Emergency Medicine
Joined MVEA
2013
David Sciacca, MD, FACEP
Medical School
Tufts University
Internship
Georgetown University Hospital
Residency
John H. Stroger Jr. Hospital of Cook County
Board Certification
Emergency Medicine
Joined MVEA
2009
Stephen Thomas, MD
Katja Von Tiesenhausen, MD
​
Medical School
University of Alabama
Residency
Boston Medical Center
Internal Medicine
Boston Medical Center
Emergency Medicine
Board Certification
Emergency Medicine
Internal Medicine
Joined MVEA
2013
Medical School
New York Medical College
Residency
Naval Medical Center, San Diego
Board Certification
Emergency Medicine
Joined MVEA
2020
Derek Wayman, MD
Rothsovann Yong, MD
Emergency Ultrasound Director
Co-Director, Emergency Preparedness & Disaster Management
Medical School
University of Massachusetts
Residency
University of Massachusetts
Fellowship
University of Massachusetts
Emergency Preparedness & Disaster Management
Board Certification
Emergency Medicine
Clinical Interests
Disaster Preparedness and Response, Ultrasound, International Medicine, DMAT Deployments
Joined MVEA
2009
Marc Roy, MD, FACEP, FAAEM
Medical School
University of Vermont
Residency
Tufts University/Baystate Medical Center
Board Certification
Emergency Medicine
Joined MVEA
2013
David Sciacca, MD, FACEP
Medical School
Tufts University
Internship
Georgetown University Hospital
Residency
John H. Stroger Jr. Hospital of Cook County
Board Certification
Emergency Medicine
Clinical Interests
Acute CHF, PE, emergency airway management
Joined MVEA
2009
Katja Von Tiesenhausen, MD
Medical School
University of Alabama
Residency
Boston University Medical Center
Internal Medicine
Boston University Medical Center
Emergency Medicine
Board Certification
Internal Medicine
Emergency Medicine
Joined MVEA
2013
Meaghan Nitka, MD
Medical School
Royal College of Surgeons, Ireland
Residency
Boston Medical Center
Board Certification
Emergency Medicine
Joined MVEA
2013
Jonathan Oppenheim, MD
Medical School
University of Massachusetts
Residency
Boston Medical Center
Fellowship
Hartford Hospital
Emergency Medicine/Critical Care
Joined MVEA
2013
Medical School
Boston University
Residency
Boston Medical Center
Board Certification
Emergency Medicine
Joined MVEA
2014