Our Board Certified Radiologists

At Modesto Radiological Medical Group, we strive to help patients achieve quality health with Radiologists providing compassionate care to patients in all day-to-day interactions. We have a commitment to excellent care in every facet of our organization - treating patients like we ourselves wish to be treated.

MRMG provides imaging services to physicians and other providers in Stanislaus County as well as services to the foothill communities and to other providers in the Central Valley of California. Key to the success of our imaging centers has been the longevity of 70 plus years in the community we serve.

Shawna R. Escobar, MD

Specialty: Mammography
Medical School: Georgetown University, School of Medicine
Residency: Morristown Medical Center, Morristown, NJ
Joined Modesto Radiological Medical Group in 2011

Reginald L. Baker, MD

Specialty: Interventional Radiology
Medical School: Tulane University School of Medicine
Residency: National Capital Consortium, Bethesda, MD
Fellowship: Interventional and Vascular, Miami Cardiac and Vascular Institute, Miami, FL
Joined Modesto Radiological Medical Group in 2017

Kirsten L. Gaarder, MD

Specialty: Diagnostic Radiology/Mammography
Medical School: Oregon Health & Science University
Residency: University of Kansas, Wichita
Fellowship: Breast Imaging, University of Chicago. Body MRI, Stanford University
Joined Modesto Radiological Medical Group in 2015

Jerry Grigoropoulos, MD

Specialty: Diagnostic Radiology
Medical School: Albany Medical College, Albany, NY
Residency: Montefiore, Albert Einstein College of Medicine, NY
Fellowship: Body Imaging, University of Pennsylvania, Philadelphia, PA
Joined Modesto Radiological Medical Group in 2003

Richard B Haak, MD

Specialty: Interventional Radiology
Medical School: University of Health Sciences/Chicago Medical School
Residency: UC Irvine
Fellowship: Cardiovascular & Interventional
Joined Modesto Radiological Medical Group in 2002

James W. Jaffe, MD

Specialty: Diagnostic and Neuro Interventional Radiology
Medical School: Temple University
Fellowship: Neuroradiology, University of Pennsylvania
Joined Modesto Radiological Medical Group in 2017

Michael R. Klieger, MD

Specialty: Neuroradiology
Medical School: State University of New York Health Science Center at Syracuse
Fellowship: Neuroradiology, New York University
Joined Modesto Radiological Medical Group in 2008

Christopher Neal, MD

Specialty: Diagnostic and Neuro Interventional Radiology
Medical School: University of Texas Health Science Center at San Antonio
Fellowship: Neuroradiology, Stanford University
Joined Modesto Radiological Medical Group in 2019

Ajit S. Nijjar, MD

Specialty: Musculoskeletal Imaging
Medical School: Medical School at Rajindra Hospital & Medical College
Residency: Ohio State University, Columbus
Fellowship: Body Imaging & Musculoskeletal Imaging, University of Vermont
Joined Modesto Radiological Medical Group in 2004

Robert Perkins, MD

Specialty: Musculoskeletal/Neuroradiology
Medical School: University of California at Davis
Residency: Bryn Mawr Hospital, PA
Fellowship: Musculoskeletal/Neuroradiology Combined MRI Fellowship, Thomas Jefferson University
Joined Modesto Radiological Medical Group in 2019

Thomas J. Rhodeman Jr., MD

Specialty: Interventional Radiology
Medical School: Tulane University School of Medicine
Fellowship: Interventional & Vascular Radiology, University of California-Davis Medical Center
Joined Modesto Radiological Medical Group in 1995

Michael R. Tekautz, MD

Specialty: Cross Sectional Imaging
Education: University of Minnesota
Medical School: University of Minnesota
Residency: Harbor-UCLA Medical Center
Fellowship: Ultrasound/Body CT, Harbor-UCLA Medical Center
Personal: Family, food, wine, whisky, live theater, sports
Joined Modesto Radiological Medical Group in 1984

Quoc - Han Van Nguyen, MD

Specialty: Diagnostic Radiology

Medical School: University of Queensland Ochsner Clinical School-Australia/Louisiana

Residency: University of Florida-Jacksonville

Joined Modesto Radiological Medical Group in 2024

Michael A. Zeppa, MD

Specialty: Diagnostic Radiology
Education: UC Davis
Medical School: UC San Diego
Residency: UC Davis
Fellowship: Abdominal Imaging at UC Davis
Personal: Family, travel, cooking, skiing, snowmobiling
Joined Modesto Radiological Medical Group in 1997