Medical Directors

Member wellness drives every decision we make. Our diverse medical directors bring an average of 27 years of experience across private practice, hospitals, medical centers and managed care. Together, they provide trusted leadership to ensure members receive high-quality care that meets their unique needs.

Chief Medical Officer

Richard Pitts, D.O., Ph.D.

Expertise: Clinical Practice, Occupational Health, Hospital Leadership

Certifications: Diplomate, American Board of Emergency Medicine; Diplomate, American Board of Preventive Medicine

Deputy Chief Medical Officer

Zeinab Dabbah, M.D., J.D., MPH

Expertise: Primary Care; Commercial, Medi-Cal and Medicare Managed Care; Medical Group Operations

Certification: Diplomate, American Board of Internal Medicine

Medical Director, Medicare Programs

Steven Arabo, M.D.

Expertise: Internal Medicine, Medicare Managed Care

Certification: Diplomate, American Board of Internal Medicine

Medical Director, CalAIM

C. Hsien Chiang, M.D., FASAM, FACCP, CCHP-P

Expertise: Public Health, Justice-Involved Populations

Certifications: Fellow, American Society of Addiction Medicine; Fellow, American College of Correctional Physicians

Medical Director, Medical Management

Himmet Dajee, M.D., FACS

Expertise: Cardiac and Thoracic Surgery

Certification: Diplomate, American College of Thoracic Surgery

Medical Director, BehaviorAL Health

Natalie Do, D.O., Pharm.D.

Expertise: Adult, Child and Adolescent Psychiatry

Certification: Diplomate, American Board of Psychiatry and Neurology

Medical Director, PACE

Donna Frisch, M.D.

Expertise: Internal Medicine

Certification: Diplomate, American Board of Internal Medicine

Medical Director, Delegation Oversight

Robin Hatam, D.O.

Expertise: Internal Medicine

Certification: Diplomate, American Board of Internal Medicine