DCHS FMR Residents

Jared Barnett

Jared Barnett, MD, MPH Jared graduated from the University of Arizona College of Medicine Tucson in December 2023. He has a Masters in Public Health from the University of Arizona. He is passionate about community medicine, equity, social justice, and inclusive care. He is also dedicated to global health and has worked in hospitals and clinics in Central America, Africa, and Asia. When not at work, he enjoys hiking, road and mountain biking, playing soccer, as well as spending time with his loved ones.


Holly Fussner

Holly Fussner, MD, MBS Holly is a graduate of the University of Colorado School of Medicine. She is thrilled to continue her medical journey in Colorado as part of the inaugural class of residents in the Denver Community Health Services Family Medicine Residency Program, believing the mission of the Denver Health system is truly remarkable. Holly discovered her passion for medicine later in life, after an 11-year career in engineering. She holds an undergraduate degree in Aeronautical and Astronautical Engineering from the University of Washington in Seattle, WA, and a master’s degree in Engineering Physics from the University of Central Oklahoma in Edmond, OK.

Having lived in many states across the United States, from Oregon to Virginia, Pennsylvania, Oklahoma, Texas and finally settling in Colorado, Holly brings a diverse background and upbringing to her medical practice. Her background in engineering and experience getting to know people from across the country empowers her to approach patient care with compassion, empathy, and critical thinking skills. Holly is honored to have the privilege to treat patients throughout their lives. She especially loves working with children and is interested in pursuing future training in genetics and metabolism, with the goal of providing lifelong care for patients with medical complexities.

Outside of her medical duties, Holly cherishes spending time with her family. She has a wonderful husband and two amazing children, with a third on the way in August 2024. Additionally, she is passionate about patient advocacy and seeks to effect change through policy improvements. Holly intends to remain actively engaged in policy and advocacy efforts through organizations such as the Colorado Academy of Family Physicians and other medical and legislative bodies.


Thanh Thanh Nguyen

Thanh Thanh Nguyen, MD Thanh Thanh immigrated from Tan An, Vietnam to Green Bay, Wisconsin when she was 11. She went on to attend University of Wisconsin Madison and earned her undergraduate degree in Microbiology. She graduated from University of Wisconsin School of Medicine and Public Health in 2024. She plans to practice full spectrum family medicine with an emphasis on addiction medicine, sport medicine, gender-affirming care, and refugee health. She enjoys hiking, biking, and recreating her grandma’s recipes. She has an impressive board game collection and loves hosting game night with her partner.


Arjun Singh Grewal

Arjun Singh Grewal, DO, MS Arjun was born and raised in the Chicagoland area. He attended medical school at Lincoln Memorial University-DeBusk College of Osteopathic Medicine in Harrogate, Tennessee. Arjun is passionate about addressing inequities in health care and providing care to underserved and marginalized communities. Outside of his medical pursuits, Arjun enjoys playing (and watching) basketball and hiking. He is also an avid traveler! Arjun has ventured across six continents and hopes to eventually check Antarctica off his list!