Required systems upgrades to the California Medicaid Management Information System (CA-MMIS) are scheduled to take place during two weekends in October. This is an upgrade of the hardware where many Medi-Cal services run. Upgrades will start during the regular daily maintenance period, which begins at midnight, and will continue through extended maintenance windows on October 9 and October 16. During these windows, providers will be unable to submit transactions.

To reduce the impact on providers, upgrades are scheduled during a period when the systems are used less frequently.

A System Status Alert will be posted on the Medi-Cal website the Friday before the scheduled system upgrades. The alert will provide additional details, including the anticipated extended maintenance window timeframe.

Providers who subscribe to the Medi-Cal Subscription Service and select the “System Status Alert” option will receive an email notification when an alert is posted on the Medi-Cal website.