Blue Cross Blue Shield in Washington: Premera and Regence Billing Guide
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Washington has two Blue companies in different counties. Premera Blue Cross covers Washington except Clark County. Regence BlueShield covers select counties. Check the member's ID card, then open the matching section.
Checked 10/1/26.
Premera Blue Cross (Washington)
Premera's payer ID is 00430 (dental 47570), and the same ID applies in Alaska. EDI contact: . Paper claims: Premera Blue Cross, PO Box 91059, Seattle, WA 98111-9159; the EDI page says the ID card controls (Washington contact, Alaska contact). Appeals: PO Box 91102, Seattle, WA 98111-9202. BlueCard eligibility 800-676-BLUE (2583). Availity 800-282-4548; provider sign-in is Availity Essentials.
| Customer service | 877-342-5258, option 1, 6 a.m. to 5 p.m. Pacific |
|---|---|
| Washington HMO | 844-722-4661 |
| Provider relations | |
| Provider site | premera.com/wa/provider |
| State regulator | Washington Office of the Insurance Commissioner |
Premera excludes Clark County. Members there are on a different Blue plan. Use the ID card.
Regence BlueShield (Washington)
Regence covers select counties of Washington. Regence and Premera cover different counties, so use the member's ID card. Regence's provider site is regence.com/provider, signed in through Availity. State regulator: Washington Office of the Insurance Commissioner. See the other Blue plans guide for Regence in Idaho, Oregon and Utah.
Regence or Premera? Check the card, not the county
Regence BlueShield serves select Washington counties. Premera Blue Cross serves Washington except Clark County. Both are independent licensees, and their areas overlap in King, Pierce, Kitsap and other counties. Coverage depends on the employer group, the product and the member ID card.
What to do Monday morning with Regence and Premera in Washington claims
- Verify eligibility first and read the member card.
- Use each plan's own provider site and portal.
- Treat Regence and Premera as separate companies with separate rules.
- Washington's Office of the Insurance Commissioner says health plans must treat mental health care like medical care for prior authorization, medical necessity review and reimbursement rates.
Frequently asked questions
Which Blue covers Clark County, Washington?
Not Premera. Premera covers Washington except Clark County, so use the member's ID card.
What is the Premera payer ID?
00430 for medical claims, and 47570 for dental.
Are Premera and Regence the same company?
No. They are separate Blue companies. Their Washington service areas overlap in some counties, so check the member ID card and eligibility.
Is Regence the same company as Premera?
No. Both are independent Blue licensees in Washington, and their service areas overlap.
Does Regence cover every Washington county?
No. Regence serves select counties. Check the member ID card and eligibility instead of assuming by county.
What does the Washington insurance commissioner say about mental health parity?
Health plans must treat mental health and substance use disorder care the same way they treat medical and surgical care, including prior authorization and reimbursement rates.
Questions to ask before you bill
Every Blue Cross and Blue Shield company is independent. Rules from one plan do not carry to another, and the member card shows which plan pays. For accurate timely filing, confirm the information when completing the patient insurance benefits verification. Keep proof of every submission, and use the plan's own portal for appeals. MCM South serves psychotherapists and psychiatrists. This guide is operational information, not legal advice.
Related billing guides
- Credentialing with insurance companies
- In-network vs out-of-network credentialing
- Credentialing and network status
- Denied and rejected claims follow-up and appeals
- Electronic claims submission
- Billing terms glossary
- Who MCM South serves
Sources, checked 10/15/26: Cambia regional health plans, Premera service areas, Washington OIC parity guidance.
How MCM South helps with Blue Cross Washington
MCM South bills Blue plans for psychotherapists and psychiatrists in the states we serve. We verify benefits, submit claims electronically, follow up on denials and appeals, and handle credentialing. Get a free quote. If a Blue Cross Washington claim is denied or credentialing stalls, we follow up for you.
MCM South currently serves practices in GA, MA, CT, TX, FL, NY, CO, TN, NC and IL, and has worked in all 50 states. If your state is not on that list, ask us. This page is operational guidance for billing, not legal advice. For real financial or legal exposure, talk to your attorney or compliance officer.
Related: Blue Cross by State · How Blue Cross Blue Shield Works · Billing Terms Glossary · CPT and E/M Code Guide · Who We Serve.
This is the MCM South guide to Blue Cross Washington for therapists and psychiatrists: where claims go, how appeals work, and what to check first.
Want a billing team that handles this for you? MCM South bills for psychotherapists and psychiatrists. Get a free quote.