Since 1995 Humboldt IPA has partnered in delivering quality health care in Humboldt County. The Humboldt IPA provides leadership in working with health plans and health care providers to ensure that medical care is provided in a manner that enhances the public health and promotes access to quality care. Fostering local accountability while providing appropriate, proficient, cost effective medical care benefits the people of our community.

Mission Statement: The Humboldt IPA’s mission is to provide our community with the highest quality of care in an efficient, cost-effective manner. We feel this mission is best accomplished by a local, physician-sponsored organization that understands the health care requirements of our community.

We provide administrative, claims processing and medical management services for the following health plans:
  • Anthem Blue Cross HMO
  • Blue Lake Rancheria Medical and Dental Health Plans
  • CalPERS Blue Shield HMO
  • IPA Employee Assistance Program


Current Officers:

Board Officers:
Kathleen Cassel, MD (President)
Donald Iverson, MD (Treasurer)
Bruce Kessler, MD (Secretary)

Series B Non-Voting Representatives:
A. Scott Greer, PhD

Board of Directors:
Kathleen Cassel, MD (President)
Donald Iverson, MD (Treasurer)
Bruce Kessler, MD (Secretary)
Glenn Siegfried, MD
John Van Speybroeck, MD
Maya Zwerdling, MD


Meet Our Staff