Already part of the Care1st Provider Network?

Need to report a change to your practice?

If you are already contracted with Care1st and would like to report a change to your practice, please email us at Demographicupdates@care1st.com advising us what has changed. Here are examples of changes you can submit through email:

All other changes should be sent in writing to:

Care1st Health Plan
601 Potrero Grande Dr.
Monterey Park CA 91755
Attention: Provider Relations

Interested in becoming part of the Care1st Provider Network?

If you are an Ancillary provider who is licensed to service both Medicare and Medi-Cal members in California, please email your Letter of Interest (LOI) to: Lettersofinterest@care1st.com

Please provide the following information when submitting your LOI:

All other changes should be sent in writing to:

Care1st Health Plan
601 Potrero Grande Dr.
Monterey Park CA 91755
Attention: Provider Relations



Please call 323/889-6638 ext. 3388 to speak to a Provider Relation Representative.