Sara Park
Practice administrator
Sara handles membership intake, billing, scheduling. Twelve years in healthcare admin. The voice on the phone.
VOL IV · CHAPTER III · The physiciansThree physicians · 1,200 members totalAtrium Health Society · San Francisco
Physicians · trained at the academic centers
Three physicians. One panel each.
The Atrium model only works because each physician carries a small panel. Membership is mutual fit — members choose their physician, the physician decides whether their panel can take a new member. Below, the three physicians, in detail.
I · Dr. Anna ReyesPanel · open · 12 spots remainingAtrium Health Society · San Francisco
Physician portrait
· Dr. Anna Reyes ·
· Dr. Anna Reyes ·
Dr. Anna Reyes, MD
Founding physician
BOARDS
ABIM Internal Medicine · 2009 · ABLM Lifestyle Medicine · 2018
TRAINING
Harvard Medical School (MD, 2005) · Massachusetts General Hospital residency (2005–2008) · MGH primary-care fellowship (2008–2009)
BIOGRAPHY
Anna founded Atrium in 2019 after twelve years on faculty at MGH and on the Harvard primary-care faculty. She trained physicians in internal medicine, but spent a decade frustrated by the structural pressure of fee-for-service medicine. Atrium is the practice she wanted to be a patient at.
II · Dr. Marcus TrentPanel · 4 spots remainingAtrium Health Society · San Francisco
Physician portrait
· Dr. Marcus Trent ·
· Dr. Marcus Trent ·
Dr. Marcus Trent, MD
Senior physician
BOARDS
ABIM Internal Medicine · 2013 · ABMH Hypertension Specialist · 2019
TRAINING
Yale School of Medicine (MD, 2010) · UCSF Internal Medicine residency (2010–2013) · UCSF hypertension fellowship (2013–2014)
BIOGRAPHY
Marcus joined Atrium in 2022 from a 14-physician group practice. His clinical focus is cardiometabolic — hypertension, lipid management, prediabetes. He is the physician who reviews every member's ASCVD risk score during the annual physical.
III · Dr. Imani BelloPanel · open · accepting membersAtrium Health Society · San Francisco
Physician portrait
· Dr. Imani Bello ·
· Dr. Imani Bello ·
Dr. Imani Bello, MD
Senior physician
BOARDS
ABIM Internal Medicine · 2017 · ABFM Sports Medicine · 2018
TRAINING
Johns Hopkins School of Medicine (MD, 2014) · Stanford Internal Medicine residency (2014–2017) · Stanford Sports Medicine fellowship (2017–2018)
BIOGRAPHY
Imani joined Atrium in 2024 from the Stanford faculty, where she practiced primary care and team-medicine for the Stanford athletics department. Her clinical focus is musculoskeletal medicine, sports performance, and adolescent care.
IV · Behind the physiciansThe team that makes the practice workAtrium Health Society · San Francisco
Three physicians, three support staff.
Marcus Trent, RN
Clinical nurse
Marcus pulls and reads prior records before every new-member visit. Twelve years of nursing experience.
Dr. Helen Choi, ND
Wellness coordinator
Helen runs the lifestyle-medicine + nutrition program. Naturopathic doctor; coordinates with the MD physicians.
V · ApplyLimited membershipsAtrium Health Society · San Francisco
