How to Enroll

Do you want to sign up for OneCare?

We make it easy.

Enrolling in OneCare (HMO SNP) is simple and easy! You can download an enrollment form in English, Spanish or Vietnamese and mail it to the address below. For more information, please call OneCare Customer Service at the numbers below.

We are open Monday through Friday from 8 a.m. – 5 p.m., and closed certain holidays. To sign up for OneCare call 1-800-960-9070. TDD/TTY users can call toll-free at 1-800-735-2929.

Enrollment Form Print this application, to apply for OneCare and mail it to:

CalOptima
Attention: OneCare Customer Service
505 City Parkway West
Orange, CA 92868

OneCare Customer Service
You can contact us online or by phone, 24 hours a day, 7 days a week.
1-877-412-2734 Toll-free
1-800-735-2929 TDD/TTY
Sign Up for OneCare
1-800-960-9070 Toll-free
Enrollment information

Visit Us

Visit our office Monday through Friday from 8 a.m. to 5 p.m.
Walk-ins welcome.
We are closed on certain holidays.
Address, map and directions
We speak your language
Request interpreter services

New OneCare Members

New member orientation schedule
Come to a meeting to learn about your new benefits
Frequently asked questions
Get quick answers to common questions about OneCare

Pharmacy

About the OneCare pharmacy program
Learn about your drug benefits
Medication Therapy Management
This program gives you tools to get the most from your drugs

To file a complaint with Medicare, click on the following link to complete a complaint form on the Medicare website: Medicare Complaint Form.

H5433_WEB020_M Accepted 06/17/19

OneCare (HMO SNP) is a Medicare Advantage organization with a Medicare contract. Enrollment in OneCare depends on contract renewal. Eligible beneficiaries can enroll at any time. Eligible beneficiaries must have Part A and Part B to enroll in the plan. This information is not a complete description of benefits. Contact the plan for more information. Limitations, copayments, and restrictions may apply. Benefits, premiums and/or co-payments/co-insurance may change on January 1 of each year. Co-pays, co-insurance, and deductibles may vary based on the level of Extra Help you receive. Please contact the plan for further details. Other Pharmacies/Physicians/Providers are available in our network. Medicare beneficiaries may also enroll in OneCare (HMO SNP) through the CMS Medicare Online Enrollment Center located at http://www.medicare.gov. Medicare has neither reviewed nor endorsed this information. The Formulary, pharmacy network, and/or provider network may change at any time. You will receive notice when necessary. OneCare complies with applicable Federal civil rights laws and does not discriminate on the basis of race, color, national origin, age, disability, or sex. This information is available for free in other languages. Please call our customer service number at 1-877-412-2734, 24 hours a day, 7 days a week. TDD/TTY users should call 1-800-735-2929.

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