
Medical Directors
The PHC medical directors are proud of their role in promoting access to high-quality health care for the Medi-Cal population in PHC's 14 counties. The medical directors are responsive to inquiries from our clinician network, pro-active in addressing quality and systems issues they encounter, and logical and rational in their approach to complex medical scenarios.
Chief Medical Officer:
Robert Moore, MD MPH MBA, Family Medicine
Regional Medical Directors:
Northern Region (Shasta, Siskiyou, Trinity, Modoc, Lassen): David Glossbrenner, MD MBA, Internal Medicine
Northwest Region (Humboldt, Del Norte): Jeff Ribordy, MD MPH, Pediatrics
Southeast Region (Yolo, Solano, Napa): Colleen Townsend, MD, Family Medicine
Southwest Region (Marin, Sonoma, Mendocino, Lake): Marshall Kubota, MD, Family Medicine
Associate Medical Director for Quality:
Mark Netherda, MD, Family Medicine
Associate Medical Directors:
Bettina Spiller, MD, Family Medicine; James Cotter, MD MPH, Family Medicine; Mark Glickstein, MD, Internal Medicine; David Katz, MD, Family Medicine