Vascular Surgery Fellows

Annie Mooser

Annie Mooser, MD 

Dr. Annie Mooser is our new first year fellow for the Vascular Fellowship Program. She was born in New York City and graduated with a B.A. in History and Hispanic Studies from Boston College. After college she was a Peace Corps Volunteer in the Andes of northern Peru. She completed the post-baccalaureate premedical program at the University of Virginia and received her Medical Degree from the George Washington University School of Medicine and Health Sciences where she was a member of the Gold Humanism Honor Society and received the Benjamin Manchester Humanitarian Award upon graduating. She was a general surgery intern at Walter Reed National Military Medical Center and completed residency at St. Louis University where she was elected to the Alpha Omega Alpha Honor Society. Her interests include Vascular Trauma, durability of hemodialysis access, and Thoracic Outlet Syndrome. Outside of the hospital, she enjoys all of the sunshine on the Westside and is grateful for any opportunity to watch the sunset.

Vascular Surgery Residents

Amanda Chin

Amanda Chin, MD, MBA

Originally from Short Hills, NJ, she moved to Philadelphia to attend the University of Pennsylvania for undergrad, majoring in Biochemistry. She went on to complete a dual-MD/MBA at the Perelman School of Medicine and The Wharton School with a focus in Health Care Management. Her research interests include the development and implementation of new technology and devices within vascular surgery, as well as clinical outcomes research inaortic and peripheral vascular disease. She is also passionate about mentorship and medical education. In her free time, she enjoys cooking/baking, running outdoors, traveling and discovering new restaurants to try.

Marianna Pavlyha

Marianna Pavlyha, MD

Originally from Ukraine, Dr. Marianna Pavlyha spent most of her adult life living and receiving education in New York City. She started her medical career at Columbia University Medical Center, where she spent two years studying the mechanisms of newly developed small molecule regulators of lipid metabolism. She pursued medical education at SUNY Downstate Medical Center. During that time, she continued to explore research interests as part of the NIH-T35 Harvard-Longwood Research Training in Vascular Surgery by studying the role of the atheroprotective and anti-inflammatory gene A20/TNFAIP3 in influencing the risk of deep vein thrombosis (DVT). Her current interests include academic surgery and student education.

Marvin Chau

Marvin Chau, MD

Originally from Chantilly/South Riding, VA, he attended Virginia Commonwealth University, completing a bachelors in biology. He went on to complete his medical degree at Penn State College of Medicine. His passion for vascular surgery dates back to his high school days where he attributes strong exposure to the field and is solidified through exceptional mentorship throughout the years. His current research interests include medical education in vascular surgery and clinical outcomes in AVF, aortic, and peripheral arterial disease. Dr. Chau is excited about paying forward his experiences through mentorship and teaching of students. During Dr. Chau’s free time, he enjoys working out, hiking, traveling, biking, relaxing on the beach, and exploring the food scene. Also, last but not least as an avid connoisseur of boba he enjoys the variety of boba selections Southern California has to offers.


JoAnna Shaw

JoAnna Shaw, MD

Dr. JoAnna Shaw grew up in the beautiful Hudson Valley in downstate New York where she developed a love for the outdoors at a young age. She attended New York University for her undergraduate studies, earning a degree in Biochemistry with a minor in Mathematics. After college, she pursued a Master of Science in Infectious Diseases and Microbiology at the University of Pittsburgh, where her thesis work focused on developing novel inhibitors of antimicrobial resistance. Dr. Shaw earned her doctorate at the Jacobs School of Medicine of the State University of New York at Buffalo. She was delighted to discover a passion for the field of vascular surgery and to develop strong relationships with many wonderful mentors, including Dr. Linda Harris. Dr. Shaw’s interests include addressing health disparities in vascular surgery outcomes as well as vascular trauma surgery and intensive care. In her free time she enjoys playing with her two kittens (Mochi and Miso), discovering new restaurants around LA, and soaking up the California sun.


matali doshi

Mitali Doshi, MD

Dr. Mitali Doshi is our new PGY-1 for the Vascular-Integrated Residency Program. She grew up in Anaheim, CA and attended UCLA where she majored in Physiological Science with a minor in Global Studies. Upon graduating, she attended University of Massachusetts Chan Medical School, where she gained an interest in peripheral bypass outcomes and gender differences in vascular diseases and outcomes. During her time in medical school, she was also a part of many extracurricular activities that centered around mentorship, community service, and education. In her free time, she enjoys traveling, hiking, strength training, cooking, painting, and knitting.

Mokhshan Ramachandran

Mokhshan Ramachandran

Dr. Mokhshan Ramachandran joins our team as a PGY-1 in the Integrated Vascular Surgery Residency Program. Originally from Brussels, Belgium, Dr. Ramachandran pursued his undergraduate studies at UCLA, majoring in Psychobiology. Following his graduation, he served as a Firefighter and Recovery Diver in Wisconsin and Utah. Dr. Ramachandran later earned his medical degree from the UC San Diego School of Medicine, where he developed an immediate passion for vascular surgery. During his time there, he engaged in an NIH-funded research year, focusing on outcomes in lower-extremity arterial bypass surgery. His current clinical interests include vascular trauma, limb salvage and bioinformatics. In his free time, Dr. Ramachandran enjoys spending as much time outdoors as possible, taking impromptu trips to National Parks and frequenting jazz clubs around LA.

To learn more please contact our Education team

David Rigberg, MD
Program Director 
Integrated Residency and Independent Fellowship in Vascular Surgery 

Alexa Osime
Vascular and Podiatry Surgery Residency and Fellowship 

Phone: 310-825-8778 
Fax: 310-267-0369 
[email protected]

Chi Quach
Director of Education
Department of Surgery

Phone: 310-206-9291 
Fax: 310-267-0369 
[email protected]