How to Enroll

Do you want to sign up for OneCare?

We make it easy.

Enrolling in OneCare (HMO D-SNP) is simple and easy! You can download an enrollment form 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 1-877-412-2734. TTY users can call toll-free at 711.

Enrollment Form

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

CalOptima Health
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
711 TTY
Sign Up for OneCare
1-877-412-2734 Toll-free
711 TTY

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

Frequently asked questions
Get quick answers to common questions about OneCare
New Member Orientation
Come to a meeting to learn about your new benefits

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_24WEB001_2024_A (Accepted 9/19/2023)

Disclaimers

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