Office of the CMO

The medical directors at Partnership Health Plan of California (PHC) are responsible for rendering clinical judgment in the areas of medical necessity for utilization management, grievances and appeals, quality incentive programs, potential quality issues, and health plan policies and procedures. They are experienced primary care physicians, board certified in either pediatrics, internal medicine or family medicine. 

From the Desk of the CMO

Access newsletters and meeting information developed by Dr. Robert Moore and his team.  


PHC Primary Care Blog



Spring Regional Medical Directors Forum

Living with endemic Covid requires us to continue to find ways to safely meet with each other while in person. The dialogue, discussion, and relationship building that comes from meeting and interacting with each other is vital in sharing ideas, developing new partnerships, as well as to nurturing our emotional well-being and professional fulfillment.

The California Department of Public Health (CDPH) model predicts Covid infection rates in March and April 2022, will drop to levels we were seeing in the autumn of 2021.

Detailed Notes Clinician | Leaders

Events and Webinars

Stay up to date on the latest events and webinars offered by PHC.

Optimizing the Configuration of the Electronic Health Record for Quality: 2022 Update

For many measures of quality, performance may be improved through the structure and configuration of the electronic health record system. This August, Partnership HealthPlan of California (PHC) will be releasing the fourth edition of “Best Practices for EMR Configuration: Meeting New Quality Requirements,” with several changes from the 2022 edition.

CDC Guidelines for Prescribing Opioids for Pain – 2016 vs. 2022
A review of the CDC proposed guidelines on opioid prescriptions – how these guidelines have changed from the prior version, how the guidelines may be used in practice in the treatment of acute and chronic pain, and how they might be utilized in light of Medi-Cal Rx authorization practices.

Starting and Continuing Naltrexone for

Alcohol Use Disorder in the PCP setting
This will be a practical webinar on best practices in alcohol use disorder treatment. Discussion will include key steps to patient assessment and treatment, including Naltrexone and other evidence-based treatments, and an approach to alcohol withdrawal.

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 (Del Norte, Humboldt, Lassen, Modoc, Shasta, Siskiyou, Trinity): Jeff Ribordy, MD MPH, Pediatrics

Southeast Region (Napa, Solano, Yolo): Colleen Townsend, MD, Family Medicine

Southwest Region (Lake, Marin, Mendocino,  Sonoma): Marshall Kubota, MD, Family Medicine

Associate Medical Director for Quality: 

Mark Netherda, MD, Family Medicine

Associate Medical Directors:

Aaron Thornton, MD, MBA, Internal Medicine

Bettina Spiller, MD, Family Medicine

Bradley Cox, DO, Family Medicine

David Katz, MD, Family Medicine 

James Cotter, MD MPH, Family Medicine 

Mark Glickstein, MD, Internal Medicine 

Teresa Frankovich, MD MPH, Pediatrics 


Access resources PHC medical directors find valuable for providers.

Perinatal Quarterly Newsletter

February 2021