Changes to Blue Shield of California Medicare Supplement Plans

Approximately 11,500 Medicare Supplement subscribers in open and closed plans were migrated to our new back-end claims system on July 1, 2015. If you have Medicare Supplement clients who are billed quarterly in January, April, July, and October, they were part of this migration and have received a series of communications explaining changes to their Blue Shield member ID cards, subscriber and group plan numbers, bill format, and billing payment address.

New ID card
Members who were migrated on July 1, 2015 have been mailed a new ID card that features new subscriber and group numbers. Please remind your clients that they need to present this new ID card on their next visit to their physician after July 1, to ensure that their new subscriber number is updated in provider records.

New billing statement
Migrated members will also receive a new billing statement with an improved format that will make it easier to read and find important information.

Their first new bill will be delayed, arriving approximately one to two weeks after its regular due date. Our standard 30-day grace period for payment will extend from the date on the first new bill. Billing will resume its regular schedule on their next billing cycle.

If a member uses their bank’s online bill-pay option or another automated payment option to pay their bill each month, they will need to notify their bank about their new subscriber number and bill payment address (found on the new billing statement) to ensure that their payment is applied to their new Blue Shield account rather than the old one.

Here is the migration schedule for the remainder of Medicare Supplement plan members:

  • September 1, 2015 migration includes those who are billed monthly and those billed quarterly in March, June, September, and December. This is our largest group; we will be migrating approximately 133,000 members.
  • November 1, 2015 migration includes those who are billed quarterly in February, May, August, and November. This group will include the remaining members – approximately 7,100.

Please visit our Medicare Supplement plan webpage to learn more about these changes and download related FAQs and member materials.

If you have any questions or concerns, please contact your Blue Shield representative.


  Two new hospitals added to the Blue Shield Medicare 65 Plus network

Effective July 1, 2015, Community Memorial Hospital of San Buenaventura and Ojai Valley Community Hospital are part of the Blue Shield 65 Plus network.




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