Diagnostic Radiology Residency Program
R4, Class of 2024
Christine Chang, D.O.
Hometown: Diamond Bar, California
Undergrad: University of California, Los Angeles
Medical School: Western University of Health Sciences, College of Osteopathic Medicine of the Pacific
Interests: Beets, Bears, Battlestar Galactica
Jazmyne Hefflefinger, D.O.
Chief Resident
Hometown: Harrisburg, Pennsylvania
Undergrad: Delaware State University
Medical School: Edward Via College of Osteopathic Medicine – Virginia Campus
Interests: Bowling, golfing, reading
Clinton Schaefer, D.O.
Hometown: Molalla, Oregon
Undergrad: Oregon State University
Medical School: Western University of Health Sciences, College of Osteopathic Medicine of the Pacific Northwest
Interests: Hiking, camping, kayaking, video games
R3, Class of 2025
Qui Cheun Ng, D.O.
Hometown: Hacienda Heights, California
Undergrad: University of California, Riverside
Medical School: Western University of Health Sciences, College of Osteopathic Medicine of the Pacific
Interests: Tech, stocks, and gaming
Kellen Stolze, D.O.
Chief Resident
Hometown: Osgood, Indiana
Undergrad: Rose-Hulman Institute of Technology
Medical School: Marian University, College of Osteopathic Medicine
Interests: Milk steak, ghouls, and magnets
Jose Ynigo Villanueva, D.O.
Hometown: Manila, Philippines
Undergrad: Pontifical University of Santo Tomas
Medical School: New York Institute of Technology, College of Osteopathic Medicine
Interests: Golfing, hiking, swimming, cars, and beating John at chess
R2, Class of 2026
Bach Le, D.O.
Hometown: San Leandro, California
Undergrad: University of California, Davis
Medical School: Western University of Health Sciences, College of Osteopathic Medicine of the Pacific
Interests: Anime, cryptocurrency, traveling
Hayden Porter, D.O.
Hometown: Oceanside, California
Undergrad: University of California, San Diego
Medical School: Touro University of California, College of Osteopathic Medicine
Interests: Magic the Gathering, video games, movies, gym
Jung “John” Um, M.D.
Hometown: Rowland Heights, California
Undergrad: University of California, Berkeley
Medical School: Keck School of Medicine of USC
Interests: Getting boba with Bach and Hayden, chess
R1, Class of 2027
Jeffrey Falkenstein, D.O.
GME Web Development Committee
Hometown: San Dimas, California
Undergrad: University of California, Santa Barbara
Medical School: Midwestern University, Arizona College of Osteopathic Medicine
Interests: Movies, gardening, cooking, hiking, video games
Vikrant Khosa, D.O.
Hometown: Moorpark, California
Undergrad: University of California, San Diego
Medical School: Touro University of California, College of Osteopathic Medicine
Interests: Trying new restaurants, traveling, golfing, basketball
Ryan Yamane, D.O.
Hometown: San Diego, California
Undergrad: University of California, San Diego
Medical School: New York Institute of Technology, College of Osteopathic Medicine
Interests: Gaming, food, guitar, traveling