Welcome to Care1st AdvantageOptimum Plan (HMO)

Thank you for visiting Care1st AdvantageOptimum. If you have questions pertaining to your 2018 claims, appeals or disputes, please call 800-544-0088 and ask to speak with a Texas representative.

Contact us:
Member Services: 1-800-544-0088
TTY: 711
(8 a.m. to 8 p.m., seven days a week from October 1 to March 31,
and 8 a.m. to 8 p.m., Monday through Friday, from April 1 to September 30)


Mailing Address:
Care1st AdvantageOptimum
Member Services Department
601 Potrero Grande Dr.
Monterey Park, CA 91755


  Discrimination is Against the Law (Affordable Care Act)
Care1st AdvantageOptimum complies with applicable Federal civil rights laws and does not discriminate on the basis of race, color, national origin, age, disability, or sex. Care1st Health Plan does not exclude people or treat them differently because of race, color, national origin, age, disability, or sex. Care1st AdvantageOptimum is an HMO that contracts with the federal government to provide Medicare services and benefits. more...