Choose the Kaiser contact for the member's region, product, and request. California's professional-provider guides list 888-576-6789 for HMO benefits and eligibility, while claims inquiries use 800-390-3510. Colorado Member Services uses 800-632-9700, Georgia Provider Relations 404-364-4934, Hawaii commercial eligibility 1-800-966-5955, Mid-Atlantic provider assistance and utilization management 1-800-810-4766, and Northwest Member Services 503-813-2000. Washington separates Member Services (1-888-901-4636) from provider claims/referral assistance (1-888-767-4670). Initial authorizations, appeals, and self-funded products can require different contacts; use the tables and sources below, then confirm against the current notice or ID card.
Why "The Kaiser Number" Isn't One Number
Kaiser Permanente is an integrated system, but it is not one company for provider-contact purposes. Kaiser operates through separate regional Kaiser Foundation Health Plan entities — Northern California, Southern California, Colorado, Georgia, Hawaii, Mid-Atlantic (Maryland, Virginia, and Washington D.C.), the Northwest (Oregon and Southwest Washington), and Washington state — and each region runs its own member services line, claims department, and provider portal (Kaiser Permanente Community Provider Portal).
For a traveling member or an out-of-area emergency claim, identify the member's coverage region and product before choosing a contact. The provider's location alone does not determine claims routing. Also distinguish a claim-status inquiry from a new authorization request, a provider payment dispute, or a member appeal.
Use the Current Regional Provider Site
Start at Kaiser's Community Provider Portal and select the member's region. Washington has a separate provider site. Confirm the destination of saved bookmarks before using their contact information; public reference pages and authenticated tools can have different addresses.
Kaiser Permanente Regional Provider Contact Directory
| Region | States | Member Services / Eligibility | Claims & Prior Auth |
|---|---|---|---|
| Northern California | CA | 888-576-6789 (HMO provider benefits/eligibility; weekdays 8 a.m.–5 p.m. Pacific, IVR 24/7) | Emergency/non-referred claims: 800-390-3510; initial authorizations/referrals: local Referral Operations; UM reconsiderations/appeals: 888-987-7247 |
| Southern California | CA | 888-576-6789 (professional-provider HMO/DHMO/Senior Advantage benefits/eligibility) | Claims: 800-390-3510; initial authorizations/referrals: the patient's home-service-area Outside Referral Department |
| Colorado | CO | 800-632-9700 | National Claims Administration 303-338-3800 |
| Georgia | GA | Provider Relations & Contracting 404-364-4934 (M–F 8:30 a.m.–5 p.m. ET) | Claims 888-865-5813; portal/system help desk 877-240-1433 (M–F 7 a.m.–6 p.m. ET) |
| Hawaii | HI | Commercial/non-Medicare eligibility 1-800-966-5955; Medicare 1-800-805-2739; QUEST eligibility 808-432-5330 | Claims Department 1-877-875-3805; Authorizations/Referrals 808-432-5687; Added Choice POS has a separate helpline |
| Mid-Atlantic (MD, VA, DC) | MD, VA, DC | 1-800-810-4766 — same number handles Member Services and the Utilization Management Operations Center | Same number, prompt 2 for pre-authorization/referrals, prompt 1 for hospital admissions and ER notification |
| Northwest | OR, SW WA | 503-813-2000 or 1-800-813-2000 (8 a.m.–6 p.m.) | Claims 503-735-2727 or 1-866-441-1221; claims refunds 503-813-1900 or 1-800-756-2777 |
| Washington | WA | Member Services 1-888-901-4636; Medicare 1-888-901-4600 | Provider Assistance Unit (claims/referral status) 1-888-767-4670; authorization requests 1-800-289-1363 |
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These are function-specific starting contacts, not a single route for every product. California's institutional and self-funded instructions can differ from the professional-provider HMO contacts above. Mid-Atlantic's provider page lists 800-810-4766 for both Member Services inquiries and utilization management. Washington publishes separate provider assistance, general Member Services, Medicare Member Services, and member appeals contacts.
Sources checked September 12, 2026: Northern California 2026 HMO key contacts, Southern California professional reference guide, Colorado contacts, Georgia contacts, Hawaii July 2026 reference guide, Mid-Atlantic contacts, Northwest contacts, and Washington contacts.
Common Mistake
Selecting a contact solely because it worked for a prior patient can send a request to the wrong department. Confirm the member's coverage region, product, and request type before dialing. Follow the current denial, authorization, or remittance notice when it supplies a case-specific route.
National Claims Submission Addresses by Region
Kaiser's regional claims pages publish a national paper-claims submission table. Use the entry for the member's coverage region and product; departmental status-inquiry phones above serve a different purpose from mailing instructions.
| Region | Claims Phone | Mailing Address |
|---|---|---|
| California — Northern | 800-464-4000 | P.O. Box 8002, Pleasanton, CA 94588-8602 |
| California — Southern | 800-464-4000 | P.O. Box 7004, Downey, CA 90242-8004 |
| Colorado | 303-338-3800 | P.O. Box 373150, Denver, CO 80237-3150 |
| Georgia | 888-865-5813 | P.O. Box 370010, Denver, CO 80237-0010 |
| Hawaii | 800-966-5955 | P.O. Box 378021, Denver, CO 80237-8021 |
| Mid-Atlantic | 800-777-7902 | P.O. Box 371860, Denver, CO 80237-9998 |
| Northwest | 503-813-2000 | P.O. Box 370050, Denver, CO 80237-9998 |
| Washington State | 888-901-4636 | P.O. Box 30766, Salt Lake City, UT 84130-0766 |
| KPIC Self-Funded | 800-533-1833 | P.O. Box 30547, Salt Lake City, UT 84130-0547 |
This table reproduces the regional submission entries on Kaiser's Colorado Community Provider Portal claims page. The listed phones can differ from dedicated departmental contacts above. Several regions have distinct Denver P.O. boxes; California and Washington use other cities. These are claims-submission addresses, not member-appeal or refund addresses. KPIC self-funded is a product category, not a synonym for out-of-area care. Confirm the member's product and any claim-specific instructions before mailing.
California: Initial Authorization Is Different from an Appeal
Northern California's 2026 HMO manual, sections 2.3–2.4, directs referral inquiries, additional services, and pending authorization questions to local Referral Operations. Its 888-987-7247 clinical-review line is for UM reconsiderations and appeals; it is not a statewide initial-authorization line.
Southern California's professional reference guide directs referral and authorization requests to the Outside Referral Department in the patient's home service area:
| Service Area | Authorization Phone | Service Area | Authorization Phone |
|---|---|---|---|
| Antelope Valley | 661-729-7108 | Riverside | 951-602-4294 |
| Baldwin Park / Downey | 562-622-3880 | San Bernardino County | 909-609-3262 |
| Coachella Valley / Yucca Valley | 951-602-4294 | San Diego | 619-589-3360 |
| Kern County | 661-852-3482 | South Bay | 310-816-5324 |
| Los Angeles / West Los Angeles | 323-783-4401 | Orange County | 714-564-4150 |
| West Ventura / Woodland Hills | 805-477-7720 | Panorama City | 818-375-2806 |
For DME, Kaiser's national DME contact directory lists facility phone contacts in Northern California and a shared Southern California telephone number, 855-805-7363, alongside service-area addresses and fax numbers. A local fax or address does not imply a separate local telephone number. Confirm the appropriate department against the current DME authorization or notice.
For Southern California electronic claims, the professional reference guide distinguishes 866-285-0361 for HMO/DHMO/Senior Advantage EDI from 888-633-0835 for self-funded EDI. Its 866-213-3062 entry covers self-funded benefits, eligibility, and claims, not the general EDI help line.
The Second Mistake: Treating Washington Like the Other Seven Regions
Washington publishes its provider contacts at wa-provider.kaiserpermanente.org and links to OneHealthPort for sign-on. Its provider and member contacts are separate. Check the specific tool's access instructions; OneHealthPort is also available for Northwest provider access.
| Washington-Specific Contact | Number | Use |
|---|---|---|
| Provider Assistance Unit (PAU) | 1-888-767-4670 | Status updates or issues with claims and referrals — the primary provider contact line |
| Member Services | 1-888-901-4636 (Medicare: 1-888-901-4600) | Member benefit and eligibility questions |
| Member Appeals | 1-866-458-5479 | Appeals filed on a member's behalf; TTY 1-800-833-6388 |
| Authorization requests (Review Services, Renton) | 1-800-289-1363 | Procedure notifications, authorization logs, and authorization status |
| 24-hour emergency notification line | 1-888-457-9516 | Notify Kaiser of an emergency hospital admission — you must also call the member's PCP |
| Compliance Hotline | 1-888-774-9100 | Report suspected billing or compliance issues — this national line is shared with California |
Numbers come directly from Kaiser Permanente Washington's provider contact page. That page lists member appeals at P.O. Box 34593, Seattle, WA 98124-1593, distinct from the Salt Lake City claims-submission address. For DME authorization requests, quotes, and orders, 855-370-4624 is a fax number; telephone review inquiries use 800-289-1363. Washington also publishes a pharmacy help desk (206-630-7920 / 800-729-1174), a Medicare Part D pharmacy line (206-901-4196 / 888-301-1915), and a Mental Health Access Center (888-287-2680). Do not apply those Washington contacts to another region.
What to Have Ready Before You Call
Have the identifying information for the request available before calling:
- Tax ID Number (TIN) — the practice's, not an individual physician's, unless the rep asks specifically
- NPI — both the calling provider's and, if different, the ordering or rendering provider's
- Member ID and region — confirm which Kaiser region issued the plan from the ID card before dialing
- The denial letter, EOB, or reference number — if the call concerns a specific claim, prior authorization, or appeal already in progress
Confirm the Region Before You Dial
Check the current ID card, coverage record, and determination notice for the member's region and product. If those details are unclear, use the contact printed on the card to confirm routing before sending a claim or appeal.
When the Portal Beats the Phone
Kaiser's regional provider sites link to Online Affiliate and other tools for routine status checks. Portal access and electronic-claims clearinghouse support are different questions: Kaiser lists supported EDI trading partners on its regional claims pages, including Availity for Mid-Atlantic. Check the current region, transaction, and clearinghouse instructions rather than assuming one login covers every workflow.
| Scenario | Portal Enough? | Call Instead When |
|---|---|---|
| Standard claim or eligibility status check | Usually — Online Affiliate shows current status for most regions | The portal shows nothing or the item isn't loading |
| Prior authorization submission or status | Often — most regions support online authorization tools | The request needs clinical discussion or is flagged for review |
| Filing a provider payment dispute or claim appeal | California regional claims pages support Online Affiliate submissions; confirm product and dispute type | The notice requires another route, or the portal doesn't cover this request |
| Downloading an Explanation of Payment (EOP) | Yes — available in Online Affiliate for most regions | The EOP is missing or the portal access needs to be provisioned |
| Washington-region claim or referral status | Sometimes — check the Washington provider inquiry tool first | Call the Provider Assistance Unit at 1-888-767-4670 |
Use the applicable phone contact when a status needs explanation, the portal cannot handle the request, or the notice directs you to call. Provider payment disputes and member coverage appeals can have different contacts and submission rules. Follow the region's current appeal instructions and the determination notice rather than treating a claims-inquiry number as a universal appeal route.
How Muni Calls Handles Kaiser Provider Calls
For an approved Kaiser workflow, Muni Calls can place the outbound call, follow the validated phone path for the correct region, provide the reference information permitted by the practice, and return a structured outcome for staff review. Region, plan type, call type, and exception handling are confirmed during onboarding rather than implied across every line. Managed payer operations get a fixed quote based on call volume and workflow complexity; the $499/month starting plan covers standardized receptionist use.
For the front-desk side of payer calls more broadly, see our prior authorization phone call script and eligibility verification call script and checklist. For Kaiser's appeal process and forms, see the Kaiser Permanente appeal guide, the Kaiser Permanente appeal form guide, the Kaiser Permanente appeal letter template, and Kaiser Permanente timely filing limits. For the same regional-routing directory built for a federated payer, see our BCBS provider phone numbers guide. If your practice is weighing whether to automate payer calls entirely, see our comparison of AI phone systems for medical clinics.
Frequently Asked Questions
What is the Kaiser Permanente provider phone number?
Use the directory's contact for the member's region, product, and request. For example, Washington provider claims/referral status uses 1-888-767-4670, while its Member Services number is 1-888-901-4636. California professional-provider HMO benefits and eligibility use 888-576-6789, with separate initial-authorization and appeal routes.
Why does Kaiser have different phone numbers for different states?
Kaiser publishes contacts by region and function. Some numbers are shared, while departments, claims addresses, and product-specific instructions differ. Select the member's coverage region rather than relying on the provider's location or a contact saved for a prior case.
What number do I call for a Kaiser prior authorization?
Northern California initial referral/authorization inquiries go to local Referral Operations; Southern California requests go to the patient's home-service-area Outside Referral Department. Hawaii lists 808-432-5687, Mid-Atlantic lists 1-800-810-4766 (prompt 2), and Washington lists 1-800-289-1363. Northern California's 888-987-7247 is for UM reconsiderations and appeals. Follow product-specific and notice-specific instructions.
Is Washington a separate Kaiser provider portal from the other regions?
Washington's public provider site is wa-provider.kaiserpermanente.org. It links to OneHealthPort for sign-on and publishes its own departmental contacts. The Northwest also supports OneHealthPort access, so the sign-on provider alone does not identify the member's region.
Where should I look for the current provider portal?
Start at Kaiser's Community Provider Portal on healthy.kaiserpermanente.org, select the region, and follow its current sign-on or registration link. Washington publishes its contacts and tool links on wa-provider.kaiserpermanente.org.
Where do I mail a Kaiser Permanente paper claim?
Use the entry for the member's coverage region and product in the claims-submission table above. Colorado, Georgia, Hawaii, Mid-Atlantic, and Northwest have different Denver P.O. boxes; California and Washington use other cities. Check current claim-specific instructions, and do not mail member appeals or refunds to an ordinary claims address by default.
Should I call, or use the provider portal instead?
Use Online Affiliate or the Community Provider Portal first for routine eligibility, claim status, and EOP lookups — most regions support this without a call. Call when a status flag needs a human to interpret, the portal shows nothing for something that should be there, or the matter needs a live rep, such as a disputed clinical determination.
Ready to Stop Losing Time on Hold?
Knowing which of Kaiser's eight regional lines to call — and which of that region's own departments fits the request — only solves half the problem. Someone on staff still has to make the call, wait through the queue, and document what happens. That's the part worth automating.
This guide reflects 2026 Kaiser Permanente provider contact information as published across each region's Community Provider Portal and, for Washington state, its separate provider site. Phone numbers, hours, and portal addresses change without much notice and vary by region and plan type — confirm against the number on the member's ID card or the specific denial/remittance notice if this guide's information conflicts with what you're told on a call. This information is for administrative and billing purposes and is not medical advice.