Welcome New Doctors

Larissa Chartrand, M.D. The Center for Primary Care in Vacaville welcomed another new physician to its team in November.

Larissa Chartrand, M.D., is an internal medicine doctor who comes to NorthBay Healthcare from Miami Beach, Florida, where she was medical director of the primary care center and associate program director of the internal medicine residency program at Mount Sinai Medical Center.

She earned her medical degree at St. Matthew’s University School of Medicine, Grand Cayman, Cayman Islands. She is board-certified by the American Board of Internal Medicine.


Zakwan Quwatli, M.D. NorthBay Healthcare’s Pulmonology team welcomed a new physician in March.

Zakwan Quwatli, M.D., is a pulmonologist/critical care specialist who earned his medical degree at the University of Aleppo Faculty of Medicine, Aleppo, Syria and completed fellowship training in critical care at Oregon Health Sciences University, Portland, and in pulmonary care at Chicago Medical School at Rosalind Franklin University, North Chicago. He is board-certified in internal medicine, pulmonary disease and critical care medicine.


Henry Poon, M.D. NorthBay Occupational Health welcomed a new physician in January. 

Henry Poon, M.D., earned his medical degree at Tufts University School of Medicine in Boston and holds master’s degrees in public health policy and business administration from the University of North Carolina, Chapel Hill. 

He is board-certified in occupational medicine and comes to NorthBay from a medical group in San Diego where he practiced occupational medicine since 2018. “My unique background in business and medicine provides me with the tools to navigate the complexities of the field,” he said. 


NorthBay Healthcare recently welcomed Patrick Maloney, M.D., as new medical director of its Center for Neuroscience. He earned his medical degree at Yale School of Medicine and completed his residency at Mayo Clinic. He served as a surgeon in the U.S. Air Force, including a tour of duty in Afghanistan. He served as a staff surgeon at David Grant Medical Center on Travis Air Force Base and comes to NorthBay following a one-year intensive training on complex spine treatments.

“For me, the best part of the work is when I am able to help a patient so that they can perform at their best level,” he said. 

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