On January 1, 2019, as a result of Care1st Health Plan's name change to Blue Shield of California Promise Health Plan, member and provider data were transitioned into new systems and a new infrastructure.
Provider Resource Guides
2019 Provider Data Migration and Name Change Resource Guide (PDF, 4.3 MB)
HEDIS Toolkit (PDF, 624 KB)
Periodic updates related to the transition will be on this page. In addition, we will notify you separately, when necessary, about changes impacting your practice or facility.
If you have any questions related to the name change, or about our system transitions, please email us at
There have not been updates since January 1, 2020.