Education & Training
Robert Wood Johnson Clinical Scholar Program, UCLA
MSHS, 2005 - 2007
Los Angeles County-Harbor-UCLA Medical Center
Residency, Emergency Medicine, 2001 - 2004
David Geffen School of Medicine at UCLA
Class of 2001
Georgetown University
BA, Biology, Cum Laude, 1992 - 1996
Administrative Experience
Providence Holy Cross Medical Center
January 2022-Present
Chairman of the Emergency Department
- Lead bimonthly multidisciplinary meeting
- Meet regularly with the administration to optimize ED performance
Providence Holy Cross Medical Center
January 2015-Present
Assistant Medical Director, Emergency Department
- Oversee clinical decision making
- Assist in hiring, staffing and scheduling providers in the ED
Providence Holy Cross Medical Center
January 2015-Present
Director of Patient Experience for the ER
- Created and Oversee multiple patient experience programs in the ED
- Increased Press Ganey Scores above stretch goals for the hospital
Providence Holy Cross Medical Center
January 2015-Present
Director of the EDIE (Emergency Department Information Exchange)
- Identify high utilizing patients for the hospital
- Create complex care plans for these patients to decrease utilization
Providence Holy Cross Medical Center
January 2015-Present
Member, Hospital Wide Wellness Committee
- Identify physicians with substance abuse issues or mental health setbacks
- Meet with physicians in crisis and develop strategies for self improvement
Long Beach Memorial Medical Center Emergency Department
July 2007 – August 2011
Director of Education for Emergency Department
- Coordinated residents from four programs in their ER rotation
- Provided lectures and evaluations for rotating residents
UC Irvine School of Medicine, Department of Pediatrics
April 2011-August 2016
Assistant Clinical Professor
- Teach and oversee residents from the UCI-CHOP Pediatric Residency in the ED
David Geffen School of Medicine at UCLA
2006-2008
Clinical Instructor
- Taught first year medical students in a year-long class entitled Doctoring I
Clinical Experience
Providence Holy Cross Medical Center
June 2011-Present
Emergency Medicine Physician
Teladoc
April 2021-Present
Virtual Care Provider
PUSH Health
January 2016-December 2016
Emergency Medicine Physician
Long Beach Memorial Medical Center Emergency Department
July 2004 – August 2015
Emergency Medicine Physician
Vice President, Columbia Emergency Medical Group, Inc
San Gabriel Valley Medical Center
July 2005-May 2020
Emergency Medicine Physician (Part Time)
White Memorial Medical Center
July 2004-July 2005
Emergency Medicine Physician
Research
LA County Department of Mental Health in partnership with Robert Wood Johnson Foundation, 2005-2007
Studied the Implementation of Psychiatric Urgent Care Centers in LA County
Department of Emergency Medicine, UCLA School of Med, David Schriger MD
Research Assistant, 1999
Performed cost-benefit analyses of various diagnostic tests for Diabetes Mellitus
Department of Pharmacology, Georgetown University, Martin Morad Lab
Post-Baccalaureate Research Fellow, 1996-1997; Associate Researcher, 1995-1996
Studied unitary properties of cardiac Ca2+-release mechanism in dyadic junctions
Certifications and Licensing
Diplomat of the American Board of Emergency Medicine, Nov 2005-Dec 2025
ACEP Emergency Ultrasound Proficiency (IUP, RUQ, FAST, Pericardial), Certified 2001
Medical Board of Arizona, License #62179, June 2021 - present
Medical Board of California, License #A81063, Sept 2002 - present
Medical Board of Colorado, License #DR.0071512, June 2023 - present
Medical Board of Florida, License #ME157530, April 2022 - present
Medical Board of Georgia, License #93115, August 2022 - present
Medical Board of Idaho, License #M-15472, Nov 2020 - present
Medical Board of Illinois, License #036.154828, May 2021 - present
Medical Board of Kansas, License #04-45196, Nov 2021 - present
Medical Board of Minnesota, License #2638, Telemed Registration, Nov 2020 - present
Medical Board of Mississippi, License # 30537, August 2022 - present
Medical Board of Montana, License # 2638, March 2023 - present
Medical Board of Nevada, License #21040, April 2021- present
Medical Board of New Jersey, License # 25MA10986100, June 2021 - present
Medical Board of New York, License #316041-01, October 2021-present
Medical Board of North Dakota, License #PT20279,
Medical Board of Ohio, License #35.145018, April 2022-present
Medical Board of Tennessee, License #T9096, September 2023 - present
Medical Board of Texas, License #T9096, July 2022 - present
Medical Board of Utah, License #12427982-1205, - August 2021 - present
Medical Board of Vermont, License # 042.0014835, November 2020 - present
Medical Board of Washington, License #MD 61114201, June 2021 - present
Medical Board of Wyoming, License#TL7916, October 2023-present
Drug Enforcement Agency License #BD8092518 – Current
Spanish Translator, Harbor-UCLA Medical Center, July 2001-2004
Wilderness First Aid Medicine Trained (American College of Emergency
Medicine) May 2021 - May 2023
Affiliations
Long Beach Medical Center
Long Beach, California
Miller Children's & Women's Hospital Long Beach
Long Beach, California
Providence Holy Cross Medical Center
Mission Hills, California
San Gabriel Valley Medical Center
San Gabriel, California
Publications
Chakravarthy B. Yang A. Ogbu, U. Kim, C. Iqbal, A. Haight, J. Anderson, C. DiMassa G. “Determinants of Pediatric Length of Stay in 2 Urban Emergency Departments” Pediatr Emerg Care 2015 Sep 24.
Chakravarthy B. Yang A. Anderson C. Bhargava R. DiMassa G. Kim C. Bruckner T. Schreiber M. Haight J. Lotfipour S. “Characteristics of Pediatric Psychiatric Visits At Two Emergency Departments” Society for Emergency Medicine, SAEM Annual Meeting Abstract Submission 2014- A-2361-SAEM
Gharahbaghian, L. Massoudian, B. DiMassa, G. “Methemoglobinemia and Sulfhemoglobinemia in Two Pediatric Patients after Ingestion of Hydroxylamine Sulfate” West Journal of Emergency Medicine, Aug 2009; 10(3) 197-201
DiMassa, G. Escarce, JJ. “Insurance and health care expenditures: what's the real question?” Ann Intern Med. 2007 Jun 5;146(11):814-5.
DiMassa G. Asch, S. Wells, K. Zima B, Shaner R. “Improving Access to Los Angeles Psychiatric Urgent Care Center.” Robert Wood Jonson Clinical Scholars Program Annual Meeting, Plenary Session. October, 2006 San Diego, CA
Aguilar, F. and DiMassa, G. "A Model for International Short-Term Medical Relief Delegations. Treating Hurricane Mitch Victims in Honduras." Latin American Studies Association, 2000, International Congress Miami, FL.
Cleemann, L. DiMassa, G. Morad, M. Book Chapter: Ca(2+) Sparks within 200 nm of the Sarcolemma of Rat Ventricular Cells. Published in Analytical and Quantitative Cardiology (Advances in Experimental Medicine and Biology), editors: S. Sideman and R. Beyar, in Springer Press (ISBN:0306457628)
Cleemann, L. DiMassa, G. Morad, M. “Distributions of ‘Ca2+ Sparks’ in Rat Ventricular Cardiomyocytes Recorded with Rapid Confocal Microscopy.” Biophysical Journal, 1997;70(2):A273.
DiMassa, G. Cleemann L. “Calcium Sparks in Rodent Cardiomyocytes are Modulated by Holding Potential and Ca2+ Buffers.” Biophysical Journal. 1997;72(2):A44.
Cleemann, L. DiMassa, G. Morad, M. “Ca2+ sparks within 200 nm of the sarcolemma of rat ventricular cells: evidence from total internal reflection fluorescence microscopy.” Adv Exp Med Biol.1997;430:57-65.
Honors and Awards
Vituity Excellence in Leadership Award, May 2022, Annual award in recognition of outstanding leadership and contributions to the success of the partnership
Providence Holy Cross Core Value Superstar, February 2022, for demonstrating compassion and easing the way of patients in the Emergency Room
Vituity Health Care Hero of the Month, July 2021, for work improving Patient Experience
Faculty of the Year, 2011 Long Beach Memorial Medical Center, Department of Emergency Medicine, UC Irvine
Golden Apple Award for Outstanding Teacher 2008-9, Family Medicine Residency Program, Long Beach Memorial Medical Center
Medical Student Teaching Award, Harbor Department of Emergency Medicine, 2004 Edward A. Langdon Award (presented to the graduating medical student who best demonstrates compassion and humanitarian qualities), 2001
Emil Brogen Research Prize, 2001
Dean’s Scholar for Outstanding Thesis, for “Cost-Effectiveness of Diabetes Screening,” 2001
Society of Academic Emergency Medicine’s Award for Excellence in Emergency Medicine, 2001
Letter of Distinction in Surgery, 2000-2001
Letter of Distinction in Doctoring III, 2000-2001
Letter of Distinction in Pediatrics, 2000-2001
Reconocimiento Especial (Special Accommodation) from the government of Honduras for work with the indigenous people of Central Honduras, 2000
Recipient, Bishop Bertrand Stevens Scholarship, 1997-2001
Cum Laude, Georgetown University, 1996
Honors English graduate with thesis on William Harvey and 17th Century Poetry, 1996 Recipient, Huntington Hospital Women’s Guild Scholarship, 1993
