Blue Shield of California has experienced ongoing system issues that have recently been corrected. As a result of these issues, some Individual and Family Plan members received past billing statements showing incorrect amounts due. Affected members will receive a detailed statement of corrections for these past months and, in some cases, previous years, in their January billing statements. Those who have been over billed will be credited, and those who have been under billed will only be responsible for adjustments to the December premium, not for past months of accrued charges.