About Us

Seaside Health Plan (“Seaside”) is a not-for-profit California licensed Knox-Keene Health Care Service Plan operated by MemorialCare Health System. Seaside Health Plan provides its members  to a growing network of providers with access to more than 300 primary care physicians, a large network of more than 1600 specialists and a network of advanced acute care children’s hospitals, ambulatory care centers and more.

Seaside focuses on providing individuals and families with Commercial, Medicare and Medi-Cal Commercial coverage with convenient access to quality, evidence-based medicine, superior value, exceptional service and a network of physicians, hospitals, outpatient centers, ambulatory surgery and imaging facilities and other providers through its commercial plan and multiple contracts with various health plans. 

With Seaside—named for MemorialCare’s first hospital which opened in 1907 and is today Long Beach Memorial Medical Center—MemorialCare continues its commitment to expanded population-based health care.

These developments enhance MemorialCare’s mission of ensuring Southland communities have access to quality service and easy access to a network of integrated providers plus preventive care for all ages.


Seaside partners with MemorialCare Medical Group, Greater Newport Physicians, The Children’s Clinic, “Serving Children and their Families”, MemorialCare Family Medicine Program and other community-based physicians. Our participating hospitals include Miller Children’s & Women’s Hospital Long Beach, Long Beach Memorial, Orange Coast Memorial Medical Center, Saddleback Memorial Medical Center and UCI Medical Center. Seaside members also have access to MemorialCare’s outpatient services and ambulatory centers.


As the region’s only health system with certified adult and children’s hospitals, we offer unprecedented, coordinated, comprehensive care for a lifetime.

MemorialCare Health System—with 200 care locations throughout Los Angeles and Orange counties—is a not-for-profit integrated delivery system which includes six top hospitals, Long Beach Memorial Medical Center, Miller Children's & Women’s Hospital Long Beach, Community Hospital Long Beach, Orange Coast Memorial Medical Center, Saddleback Memorial Medical Center in Laguna Hills and San Clemente; MemorialCare Medical Group, Greater Newport Physicians and numerous ambulatory surgery centers, imaging facilities and urgent care centers throughout the Southland.