Kaiser Permanente Headquarters Address, Corporate Office Location, and Contact Details

About

Kaiser Permanente is the largest nonprofit integrated managed care consortium in the U.S., headquartered at 1 Kaiser Plaza (the Ordway Building) in Oakland, California. Founded in 1945 by Henry J. Kaiser and physician Sidney R. Garfield, Kaiser combines health insurance, hospital operations, and physician groups under one roof — a model that distinguishes it from traditional insurers. Chair and CEO Greg A. Adams reported $127.7 billion in total operating revenues for FY2025 (including Risant Health subsidiary), $9.3 billion in net income, and a 1.1% operating margin — confirming Kaiser as the country’s largest nonprofit health system for the eighth consecutive year. Kaiser serves approximately 13.1 million members across 8 states and DC through 55 hospitals and 847 medical offices. As of January 26, 2026, over 30,000 Kaiser workers in California and Hawaii have been on strike over wages and staffing levels, adding complexity to the organization’s recovery outlook.

The Oakland HQ campus includes multiple buildings: the main corporate address at 1 Kaiser Plaza (Ordway Building), with operational offices at 1950 Franklin Street, 1800 Harrison Street, and the Kaiser Center at 300 Lakeside Drive — all in Oakland, CA 94612.

Quick Facts

Founded

1945 (Oakland, CA)

HQ

1 Kaiser Plaza (Ordway Building), Oakland, CA 94612

Industry

Nonprofit Integrated Managed Care / Health Insurance / Hospitals

Status

Nonprofit

Chair & CEO

Greg A. Adams

CFO

Kathy Lancaster

FY2025 Revenue

$127.7 billion

Members

~13.1 million | Hospitals: 55 | Medical Offices: 847 

Regional Headquarters & Member Services

Kaiser Permanente operates in 8 states + DC, each with its own regional administrative center.

Region	HQ City	Member Services
Northern California	Oakland, CA	1-800-464-4000
Southern California	Pasadena, CA	1-800-390-3510
Colorado	Denver, CO	1-800-632-9700
Georgia	Atlanta, GA	1-888-865-5813
Hawaii	Honolulu, HI	1-800-966-5955
Mid-Atlantic (MD/VA/DC)	Baltimore, MD	1-800-777-7902
Northwest (OR/WA)	Portland, OR	1-800-813-2000
Washington	Seattle, WA	1-888-901-4636

What Brings You Here? Find the Right Contact

Member services / billing / coverage dispute

Call your regional Member Services line above. NorCal: 1-800-464-4000; SoCal: 1-800-390-3510.

File a formal grievance

Submit at healthy.kaiserpermanente.org/support/submit-a-complaint and select your region. California law requires acknowledgment within 5 days and resolution within 30 days (urgent: 3 days).

Care quality / physician conduct

Contact your regional Permanente Medical Group, or file with the Medical Board of California at mbc.ca.gov.

Hospital patient safety

Call Member Services and ask to file a patient safety concern. Life-threatening safety issues can also be reported to The Joint Commission at jointcommission.org or 1-800-994-6610.

Medicare Advantage members

For unresolved Medicare appeals, contact CMS at 1-800-633-4227. Federal appeals carry mandatory timelines Kaiser must meet.

Corporate HQ (Oakland)

For business, vendor, and media inquiries: (510) 271-5910 | 1 Kaiser Plaza, Oakland, CA 94612 | Mon–Fri 9am–5pm PT. 

Legal / subpoena

Identify the correct entity before serving legal process — Kaiser Foundation Health Plan, Inc. or Kaiser Foundation Hospitals, both at 1 Kaiser Plaza, Oakland, CA 94612. Southern California Permanente Medical Group: 393 E. Walnut St, Pasadena, CA 91188.

Corporate Headquarters Address

Kaiser Foundation Health Plan, Inc.
1 Kaiser Plaza (Ordway Building)
Oakland, CA 94612

Additional Oakland Campus

1950 Franklin St | 1800 Harrison St | 300 Lakeside Drive — all Oakland, CA 94612 

Southern California Regional HQ

393 E. Walnut Street, Pasadena, CA 91188

How to Escalate a Complaint

1. Call your regional Member Services line and file a verbal grievance — get a formal grievance reference number.
2. File a formal written grievance at healthy.kaiserpermanente.org/support/submit-a-complaint — triggers Kaiser’s regulatory compliance obligations under California law.
3. Request an Independent Medical Review (IMR) — California only. If Kaiser denies a treatment as not medically necessary, California members can appeal to the DMHC for a free independent review. Kaiser must comply with IMR outcomes.
4. File with the DMHC (California). The Department of Managed Health Care at dmhc.ca.gov is the single most effective escalation for California members — the DMHC has direct enforcement authority over Kaiser’s HMO license. Call: 1-888-466-2219.
5. File with your state’s insurance regulator for members in Colorado, Georgia, Hawaii, Maryland, Virginia, DC, Oregon, and Washington State.
6. File with CMS at cms.gov or 1-800-633-4227 for Medicare Advantage disputes — federal appeal rights carry mandatory response timelines.
7. File with The Joint Commission at jointcommission.org or 1-800-994-6610 for hospital quality and patient safety complaints.
8. File with the Medical Board of California at mbc.ca.gov for physician conduct complaints.
9. Consult a healthcare attorney for wrongful coverage denials, ERISA violations, and medical negligence claims