Report cases that meet the CDC definition of Multisystem Inflammatory Syndrome in Children (MIS-C) by phone within 1 working day. Los Angeles County DPH Acute Communicable Disease Control: Call 888-397-3993 or 213-240-7821; Long Beach Health and Human Services: Call 562-570-4302. Pasadena Public Health Department: Call 626-744-6089. Fax to 310 ....