Col. Graham I. Warden is the Commander, 374th Medical Group, Yokota Air Base, Japan. He is responsible for the health and wellness of 11,500 personnel at Yokota Air Base, the US Embassy Japan, and 38 geographically separated units across the Pacific. The 374th Medical Group is a 19-clinic/15-bed hospital comprised of five squadrons and 465 personnel.
Col. Warden entered the Air Force in January 1998 via the Health Professional Scholarship Program. He served as Chief of Medical Staff at Misawa Air Base, Japan and as squadron commander at Yokota Air Base, Japan, Offutt Air Force Base, Nebraska, and Eglin Air Force Base, Florida. He established the first Pacific Air Forces operational teleradiology capability, served as the first radiology consultant to the US Central Command Surgeon General, and was the first Defense Health Agency Chief of Radiology Clinical Operations. While in Japan, he resurrected the Air Force Japanese Physician Fellowship Program, dormant since the end of the Vietnam War, bolstering the US-Japan alliance. At the Defense Health Agency, he established policy and clinical strategy for an annual 1.3-billion-dollar radiology program supporting 9.5 million beneficiaries, supported 600 Department of Defense radiologists, and delineated requirements and developed solutions for enterprise imaging.
Doctor Warden is board certified in both Diagnostic Radiology and Clinical Informatics and is a Certified Physician Executive and International Health Specialist.
EDUCATION
1997 Bachelor of Science, Chemistry, Massachusetts Institute of Technology, Cambridge, MA
1997 Bachelor of Science, Biology, Massachusetts Institute of Technology, Cambridge, MA
1998 MIT-Japan Program Internship, Ajinomoto Central Pharmaceutical Research Laboratory, Kawasaki, Japan
2002 Doctor of Medicine, University of California School of Medicine, Los Angeles, CA
2003 Transitional Internship, Mercy Hospital, Pittsburgh, PA
2007 Diagnostic Radiology Residency, Wayne State University/Detroit Medical Center, Detroit, MI
2007 Board Certification in Diagnostic Radiology, American Board of Radiology
2009 Air Command and Staff College, by correspondence
2011 Imaging Informatics Fellowship, Harvard Medical School/Brigham and Women’s Hospital, Boston, MA
2015 Air War College, by correspondence
2017 Certified Physician Executive, Certifying Commission in Medical Management
2018 Board Certification in Clinical Informatics, American Board of Preventive Medicine
2020 Capstone Course for Military Health System Leaders
2020 Defense Health Agency Acquisition Leadership Academy
2023 Designing and Building AI Products and Services, Massachusetts Institute of Technology, Cambridge, MA
ASSIGNMENTS
1. August 1998 – June 2002, Medical Student, University of California at Los Angeles Medical School, Los Angeles, CA
2. July 2002 – June 2003, Transitional Intern, Mercy Hospital, Pittsburgh, PA
3. July 2003 – June 2007, Diagnostic Radiology Resident, Wayne State University/Detroit Medical Center, Detroit, MI
4. July 2007 – June 2010, Radiology Flight Commander, 374th Medical Operations Squadron, Yokota AB, Japan
5. July 2010 – June 2011, Imaging Informatics Fellow, Harvard Medical School/Brigham and Women’s Hospital, Boston, MA
6. June 2011 – August 2013, Diagnostic Radiologist and Diagnostics and Therapeutics Flight Commander, 86th Medical
Squadron, Landstuhl Regional Medical Center, Landstuhl, Germany
7. August 2013 – June 2016, Chief of Medical Staff, 35th Medical Group, Misawa AB, Japan
8. July 2016 – July 2019, Commander, 374th Medical Operations Squadron, Yokota AB, Japan
9. August 2019 – June 2021, Chief, Radiology Clinical Operations, Defense Health Agency, Falls Church, Virginia
10. July 2021 – July 2023, Commander, 55th Healthcare Operations Squadron, Offutt AFB, Nebraska
11. July 2023 – June 2025, Commander, 96th Healthcare Operations Squadron, Eglin AFB, Florida
12. June 2025 – Present, Commander, 374th Medical Group, Yokota Air Base, Japan
SUMMARY OF JOINT ASSIGNMENTS
1. August 2019 – June 2021, Chief, Radiology Clinical Operations, Defense Health Agency, Falls Church, Virginia, as a colonel
MAJOR AWARDS AND DECORATIONS
Defense Meritorious Service Medal
Meritorious Service Medal with four oak leaf clusters
Army Commendation Medal
OTHER ACHIEVEMENTS
2011 Air Force Radiologist of the Year
2011 United States Air Forces Europe Clinical Research Excellence Award
2015 Pacific Air Forces Chief of Medical Staff Commitment to Excellence Award
EFFECTIVE DATES OF PROMOTION
Second Lieutenant January 21, 1998
Captain June 1, 2002
Major June 1, 2008
Lieutenant Colonel June 1, 2014
Colonel June 1, 2020
(Current as of Jun 2025)