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CA-MMIS Mainframe Upgrade Scheduled for January 2018

January 25, 2018

A required system upgrade to the California Medicaid Management Information System (CA-MMIS) is scheduled to take place on January 28, 2018, at 12 a.m. and will continue through an extended maintenance window until 8 a.m. This upgrade affects the mainframe operating system where many Medi-Cal services run. During the window, 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 (MCSS) and select the “System Status Alert” option will receive an email notification when an alert is posted on the Medi-Cal website. Providers who have not yet subscribed are encouraged to do so by completing the MCSS Subscriber Form.