Communicable Disease Reporting


Report a Disease

During Business Hours (Monday-Friday 8:00 am - 5:00 pm)

To report an URGENT communicable disease concern during business hours, call


For non-urgent communicable diseases, please download and complete a Confidential Morbidity Report (CMR) below. The second page of the CMR lists all reportable disease and guidelines for reporting.

HIV/AIDS reporting guidelines are posted here or you may call the Yolo County HIV/AIDS Program Coordinator at (530) 666-8670 to report.  Please do NOT fax HIV/AIDS reports.


During Non-Business Hours (evenings, weekends, and holidays)

The Yolo County Health Department is accessible after hours and on holidays at


for URGENT communicable disease concerns. Please be prepared to provide the dispatcher with your name, affiliation, the nature of the report or emergency and a phone number where you can be contacted by the Yolo County Health Department on-call staff.

Expand/Contract Questions and Answers

  • Don't labs report all these disease anyway?
  • How does the Health Insurance Portability and Accountability Act (HIPAA) affect disease reporting?
  • How quickly must disease be reported?
  • Is someone available to answer communicable disease questions?
  • Should I wait for lab confirmation before reporting a disease?
  • What diseases have been reported in Yolo County in the past?
  • What diseases must be reported?
  • What if my patient is not a resident of Yolo County?
  • What is the legal basis for diease reporting in California?
  • Where can I find more information about specific diseases?
  • Who must report dieases?
  • Why must health care providers report?