ANOKA  — A federal report says Minnesota’s second-largest psychiatric hospital could lose millions of dollars in funding if it doesn’t correct some patient and staff safety issues.

A memo from the Centers for Medicare and Medicaid Services has notified state officials that the Anoka-Metro Regional Treatment Center is in jeopardy of losing its ability to bill the federal government for services. The state has been given until March 5 to correct deficiencies, according to a Dec. 11 letter from the federal agency.

The loss of $3.5 million in annual federal funding could further impair the hospital’s efforts to treat mentally ill patients from the Twin Cities metro.

There were 48 aggression-related injuries involving 28 patients at Anoka-Metro in 2015, up from 38 such injuries involving 24 patients in 2013. The union representing workers at the facility has suggested hiring armed security guards.

The state’s new Commissioner of Human Services, Emily Johnson Piper, has visited the facility twice since being appointed in early December.