Novato-based Meritage Medical Network has named Mark Sockell, MD, its chief medical officer and appointed Dr. Nelson Branco as chair of the board of directors.

The physician-run network of 700 board-certified primary care and specialist physicians has also added two new members to its board, Kristen Matsik, MD, and Elizabeth Etemad, DO.

Sockell previously served Meritage as medical director of Medicare Advantage. His specialties are internal medicine and geriatrics. Before joining Meritage in 2014, he spent much of his career in medical education, including as director of medical education at St. Mary’s Medical Center in San Francisco, where he founded and ran the inpatient hospitalist program.

He earned his medical degree from the University of California, San Francisco, and then completed his Internship at the Jamaica Plain campus of the VA Boston Healthcare System. He did his residency at UCSF.

Branco has been a member of Meritage’s Board of Directors since 2007, serving as co-vice chair for the last six years. In addition to his tenure with Meritage, Branco is an assistant clinical professor of Pediatrics at UCSF and has worked for Marin Community Clinic, the Pediatric After Hours Clinic and at Marin General Hospital as a pediatric hospitalist. In 2005, Branco joined Tamalpais Pediatrics and has been the managing partner since 2006.

Originally from Massachusetts, Branco attended Boston University for both his undergraduate degree in psychology and medical school training. He moved to California in 1995 for his pediatric residency at Children’s Hospital Oakland, the group’s announcement stated.

Matsik, an OB/GYN who practices with the Prima Medical Group, is a member of the American College of Obstetricians and Gynecologists, she was elected a Fellow of the American College of Obstetricians in 2004. She also serves as an assistant clinical professor at the UCSF. Matsik is a graduate of the University of Virginia. She earned her medical degree from the Medical College of Virginia. Following this, she completed her residency at the University of Florida Health Science Center.

Etemad, a practitioner of family medicine, is also a member of the Prima Medical Group. After earning a bachelor’s degree in biology from Union College in Schenectady, New York, she earned her DO degree from Western University of Health Sciences’ College of Osteopathic Medicine of the Pacific in Pomona. Following that, she did a rotating internship at San Bernardino County Medical Center and then completed her family medicine residency at Wayne State University in Detroit.