Western Health Advantage

WESTERN HEALTH ADVANTAGE is affiliated with the leading hospitals and doctors throughout Northern California. Choose from more than 3,200 doctors and 15 hospitals — regardless of your plan.

We emphasize access to quality care. WHA has an exceptional range of clinical providers, with over 75% accepting new patients and support for a variety of languages spoken. WHA’s network of doctors and hospitals are conveniently located across 10 Northern California counties, including Sonoma, Solano, Marin, Napa, Sacramento, El Dorado, Placer, Yolo, Colusa, and Humboldt counties.

Unlike most HMOs, our Advantage Referral  gives you more flexibility for specialty care. If your Primary Care Physician (PCP) determines that you need specialty care, simply ask to be referred to one of 2,100 specialists across Northern California, not just those affiliated with your PCP’s medical group.  

Western Healthy Advantage is a not-for-profit HMO with a ranges of affordable health plans that offer access to an exceptional clinical provider network of highly regarded hospitals, doctors and other health care services.

Plan coverage includes hospitalization, outpatient services, prescriptions, mental health, chronic condition support, emergency and urgent care coverage, virtual care, as well as innovative wellness programs and apps to help you stay healthy.

You have access to your plan details via our secure, online MyWHA portal, as well as WHA’s local member services team which works closely with our six medical groups and hospitals to ensure you get the care you need. 

Western Health Advantage Premium Rates

For Employees

Semi Monthly Medical Plan Premiums

For Retirees

Medicare Monthly Medical Plan Premiums
Non-Medicare Monthly Medical Plan Premiums

Western Health Advantage Plan Options

For Employees and Non-Medicare Retirees

Traditional HMO

Hospital Services DHMO

Deductible First HDHP

Helpful Documents

See each plan for Summary of Benefits, Evidence of Coverage (EOC), and other plan documents

Visit the County of Sonoma webpage at www.westernhealth.com/mywha/welcome-to-wha/county-of-sonoma

Video Presentation (8:31 minutes)

Customer Service and Group Numbers

To learn more about Western Health Advantage visit www.choosewha.com/sonoma-county or call (888) 499-3198.

• All Plans Employee Group #: 950201-A000
• All Plans Retiree Group #: 950201-A001  

Service Area

SERVICE AREA MAP

Western Health Advantage is available to employees and retirees in the following Counties. To determine if your zip code is eligible to enroll, visit Not all zip codes are eligible for benefits.  Please see 

Member Benefits and Tools

MyWHA

MyWHA is an online portal that offers the ability to change doctors, order replacement ID cards and much more through MyTOOLS and MyRESOURCES.

Connect with Your Doctor

Online Access to Your Doctor: You have options for staying connected with your doctor 24 hours a day, 7 days a week. By visiting ywha.org/connect you can learn about your medical group’s online capabilities, including these following services:

• Email your doctor
• Schedule an appointment
• View lab test results
• Access your medical record
• Request prescription refills 

Provider Directory

Convenience of 24/7 searchability. Our online Provider Directory offers the most up-to-date access to doctors, hospitals, pharmacies and radiology centers. Search by specialty, hospital or medical group affiliation, patient acceptance, language and/or gender. Printed provider directories are also available upon request.

Helpful Documents

• Summary of Benefits and Coverage (SBC)
• Premier 10A - Copayment Summary, medical benefit and coverage matrix
• Evidence of Coverage (EOC) - document pending state approval
• Prescription G - Copayment Summary, pharmacy plan and coverage matrix
• Infertility C - Copayment Summary, infertility benefit and coverage matrix
• Western Health Advantage HMO Enrollment Materials