How to Report a Disease

Report Immediately

Business Hours 

  • Monday - Friday  8 a.m. until 5 p.m.
  • Phone: 707-253-4231

After Business Hours

  • Phone: 415-906-1799
  • Napa County Answering Service staff will page the on-call Communicable Disease Duty Officer.

Report within One Working Day

  • Phone: 707-253-4231
  • Fax Confidential Morbidity Report (CMR): 707-299-4479
  • Email CMR  
  • Note: To maintain patient privacy, please password protect the CMR file and email the password in a separate email to the same address.

Report within Seven Calendar Days

  • Follow the instructions for reporting within one working day