CareAdvantage Dual Eligible Special Needs Plan (D-SNP) 2024
Contact the CareAdvantage Unit
Contact the CareAdvantage Unit if you have questions about your benefits, coverage or claims. For information about enrollment or eligibility, call a licensed CareAdvantage Medicare Specialist. Our staff members speak Spanish, Chinese, and Tagalog. In addition, we use phone interpreters to assist members in other languages.
CareAdvantage Unit
Toll free: 1-866-880-0606
Local: 650-616-2174
TTY: 1-800-735-2929 or dial 7-1-1
Phone hours: Monday–Sunday 8:00 a.m. to 8:00 p.m.
Office hours: Monday–Friday 8:00 a.m. to 4:00 p.m.
Email: CustomerSupport@hpsm.org
Eligibility & Enrollment Assistance
For information, call a licensed CareAdvantage Medicare Specialist
Toll free: 1-888-252-3153 Local: 650-616-1500
TTY: 1-800-735-2929 or dial 7-1-1
Hours: Monday–Friday 9:00 a.m. to 6:00 p.m.
Visit Us in Person
Health Plan of San Mateo
801 Gateway Blvd., Suite 100
South San Francisco, CA 94080 - map
Hours are
8:00 a.m. to 4:00 p.m. Monday though Friday
Members can drop by our office to speak with a CareAdvantage Navigator in-person. No appointment is necessary. To help us better assist you, bring your CareAdvantage Member ID card with you. Visitors only need to wear masks during private appointments. We have masks on hand for those who do not have them. Other health and safety precautions are in place as well. Our office is ADA-compliant and wheelchair accessible.
For more information about visiting HPSM’s office, call the HPSM Reception Desk at 650-616-0050.
New address or contact information?
If you move and/or change your contact information (phone number, email), you must tell both HPSM and either the San Mateo County Human Services Agency at 1-800-223-8383 or Social Security Administration at 1-800-772-1213. This will ensure that you continue to get important information about your Medi-Cal coverage status.
To report your new information with HPSM, you can log in to the Member Portal or call the number below if you need assistance.
CareAdvantage Dual Eligible Special Needs Plan (D-SNP) is a health plan that contracts with both Medicare and Medi-Cal to provide benefits of both programs to enrollees. Limitations and restrictions may apply. For more information, call the CareAdvantage Unit or read the CareAdvantage D-SNP 2024 Member Handbook.
Benefits and co-pays may change on January 1 of each year.
If you speak other languages other than English, language assistance services, free of charge, are available to you. Call 1-866-880-0606 (TTY: 1-800-735-2929 or dial 7-1-1). ( Download this statement in multiple languages.)
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Page updated November 1, 2023