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Meet Our Residents

General surgery residents in the operating room at Mayo Clinic in Rochester, Minnesota.

The General Surgery Residency has over 20 residents in training at any time. Learn more about them below.

Chief residents, class of 2022

Esteban Calderon, M.D.

Esteban Calderon, M.D.
Hometown:
Quito, Ecuador
Medical school: Universidad Internacional del Ecuador
About me: I really enjoy spending time with my family and dog, traveling, running, and exploring new restaurants in the city. I will be doing a transplant and HPB fellowship at Cleveland Clinic next year.

Shengliang (Sheng) He, M.D.

Shengliang He, M.D.
Hometown:
Shanghai, China
Medical school: Shanghai Medical College, Fudan University
About me: I like gastrointestinal surgery. Outside of medicine, I enjoy cooking, playing basketball, and traveling.

Christopher (Chris) J. Webb, M.D.

Christopher Webb, M.D.
Hometown:
Findlay, Ohio
Medical school: University of Oklahoma
About me: Final year, going on to kidney and pancreas transplant. Background in exercise physiology and clinical laboratory science. Despite the heat, the north Phoenix area has grown on me a lot. When not at work, I enjoy trail riding, spending time in the garden and with our little fruit trees, and hanging out with my family. 

Class of 2023

Britton B. Donato, M.D.

Britton Donato, M.D.
Hometown:
Folsom, CA
Medical school: University of Arizona College of Medicine
About me: I enjoy aviation and spending with my family. I am interested in cardiothoracic surgery.

Jacob Hammond, M.D.

Jacob Hammond, M.D.
Hometown:
Houston, TX
Medical school: Texas A&M College of Medicine
About me: Once I complete the general surgery residency, I hope to pursue a career in plastic & reconstructive surgery. My research and career interests include breast cancer, oncologic reconstruction, lymphatic surgery, and women’s health. When not at work, I enjoy time at home with my fiance, Brooke, and our cat, Lucy. Together, we enjoy cooking recipes from Top Chef and watching the latest true-crime documentary on Netflix.

Ga-ram Han, M.D.

Ga-ram Han, M.D.
Hometown:
Seoul, South Korea / The Gambia, West Africa
Medical school: University of Medicine and Health Sciences, St. Kitts
About me: I am interested in colorectal surgery. In my spare time, I love adding new plants to my collection, traveling, going bachata dancing, watching TV, and exploring new places to eat and drink.

Marko Laitinen, M.D.

Marko Laitinen, M.D.
Hometown:
Salt Lake City, UT
Medical school: University of Nevada, Reno
About me: My family and I enjoy living in Arizona. Between shifts, we spend our time remodeling our home and exploring the restaurants of Phoenix. My hobbies include following Vegas Golden Knights ice hockey, building furniture, and playing the piano.

Class of 2024

Hasan Al Harakeh, M.D.

Hasan Al Harakeh, M.D.
Hometown:
Beirut, Lebanon
Medical school: American University of Beirut
About me: I am interested in abdominal transplant and hepatobiliary surgeries. My hobbies include hiking and cooking.

Kristen Jogerst, M.D.

Kristen Jogerst, M.D.
Hometown:
Dubuque, IA
Medical school: Geisel School of Medicine at Dartmouth
About me: I am passionate about surgical education and surgical oncology outcomes research. In my spare time, when I’m not being a surgery resident or working on research, I enjoy endurance exercise and baking with co-residents. I’m an avid runner and Peloton enthusiast. My favorite thing to bake is cinnamon rolls.

Taylor Orton, M.D.

Taylor Orton, M.D.
Hometown:
Provo, UT
Medical school: University of Nevada, Reno
About me: I'm married with one little girl. Rocks a dad bod and recently discovered the fun of smoking meats.

Austin Pierce, M.D.

Austin Pierce, M.D.
Hometown:
Fort Collins, CO
Medical school: Creighton University School of Medicine
About me: I grew up playing hockey in Colorado and have continued to play during residency. I also like to box, play spikeball, play volleyball, work out, sing, and play guitar. My favorite Air Bud movie is the football one.

Class of 2025

Valerie Armstrong, M.D.

Valerie Armstrong, M.D.
Hometown:
Boulder, CO
Medical school: University of Miami, Miller School of Medicine
About me: In my free time I enjoy spending time with friends, hiking, spoiling my cat, and training for triathlons.

Luke DeGraaff, M.D. 

Luke DeGraaff, M.D.
Hometown:
Lynden, WA
Medical school: University of Buffalo School of Medicine
About me: My hobbies/interests include hiking and fishing. I have been taking advantage of the beautiful Arizona weather to also pick up biking and golfing.

Scott Eldredge, M.D.

Scott Eldredge, M.D.
Hometown:
Salt Lake City, UT
Medical school: University of Utah
About me: I am interested in becoming a pediatric surgeon. Outside of medicine, I enjoy running, reading, and spending time with my family.

Chi Zhang, M.D.

Chi Zhang, M.D.
Hometown:
Charlottesville, VA
Medical school: Geisel School of Medicine at Dartmouth
About me: After attending medical school at Dartmouth, I learned my lesson and moved toward the warmth to my new home in Phoenix! On my off days, I like to bake and feed my co-residents who are holding the fort down at the hospital. I also ballroom dance competitively.

Class of 2026

Dillon Cheung, M.D.

Dillon Cheung, M.D. 
Hometown:
San Jose, CA
Medical school: University of California, Irvine
About me: In my free time, I enjoy the outdoors, traveling, the beach, working out, and hanging out with my co-residents. I used to breakdance competitively.

Asher Jenkins, IV M.D.

Asher Jenkins, M.D.
Hometown:
Two Harbors, MN
Medical school: University of Minnesota
About me: In my free time, I love to bike, hike, rock climb and spend as much time as I can outside. I also love spending time with my fiance and my deaf Boston Terrier, Winston.

Madeline Paton, M.D.

Madeline Paton, M.D.
Hometown:
Boulder, CO
Medical school: University of Colorado Medical School
About me: I grew up in New Mexico and Colorado. I enjoy skiing, horseback riding, hiking, and tacos.

Natasha Sioda, M.D.

Natasha Sioda, M.D.
Hometown:
University Place, WA
Medical school: Creighton University School of Medicine
About me: Outside the hospital, I love exploring the outdoors as well as traveling with my friends and family. Most recent adventures have been to San Diego and the Grand Canyon. I also enjoy finding new restaurants, experimenting with baking, and napping.

Akash Kartik, M.B.B.S.

Akash Kartik, M.B.B.S.*
Hometown:
Moradabad, India
Medical school: Government Medical College, Chandigarh
About me: I am passionate about surgical oncology. I’m a drummer, a chess player, and I enjoy cooking Indian food for friends and family.

*preliminary resident

Research

Eleanor Johnson, M.D., M.P.H.

Eleanor Johnson, M.D., M.P.H.
Hometown:
Minnetonka, MN
Medical school: Tulane University
About me: In my spare time, I like to hang with family and friends, play board games, and read. During my time in New Orleans, I became an avid Saints fan, so I try to catch as many games as possible. My husband and I have an adorable Shiba Inu who we love to bring with us when we travel and explore places.

Patricia Lu, M.D.

Patricia Lu, M.D.
Hometown:
Bellevue, WA
Medical school: Washington University in St. Louis
About me: I’m an avid hiker and baker, and have over forty indoor plants (and counting). I hope to hike all the national parks one day and have loved exploring the beauty of Arizona!