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Department of Health Services

Public Health Disease Control

Disease Reporting

Public Health relies on medical providers, school officials and the public to notify us when they encounter cases or suspected cases of certain diseases or conditions.

Public Health Nurses (PHNs) investigate reported diseases and, as appropriate, involve epidemiologists, environmental health specialists, the public health laboratory, or the health officer in their investigations.

The state of California requires doctors, surgeons, nurses, practitioners, coroners, dentists, veterinarians, administrators of health facilities and clinics to report cases or suspected cases of certain diseases and conditions to the local health department. Anyone in charge of public or private schools or preschools also must report cases or suspected cases of these diseases.

Download Forms

The Confidential Morbidity Report (CMR) forms listed below are used to report most reportable diseases and conditions. Some PDF files may require download before they can be opened.

  • To report all conditions except those listed below:
    CMR: CDPH 110A (PDF)
  • To report Tuberculosis (TB): 
    CMR: CDPH 110B (PDF)
    See Tuberculosis Control for more information
  • To report conditions which may impair the ability to operate a motor vehicle, such as lapses of consciousness or control, Alzheimer's disease: 
    CMR: CDPH 110C (PDF)
  • To report HIV/AIDS:
    See HIV/AIDS Reporting for more information
  • Submit reports to:
    Health Officer
    County of Sonoma
    Department of Health Services
    625 5th Street, Santa Rosa, CA 95404  
    Phone: (707) 565-4567
    Fax:  (707) 565-4565

Reportable Diseases and Conditions

The following describes the reporting requirements for communicable diseases and and is displayed here for your convenience, last updated April 6, 2021. This data was sourced from California Department of Health (CDPH), form chph110a.pdf. For the latest information, please visit CDPH.

Per Title 17, California Code of Regulations (CCR) §2500, §2593, §2641.5-2643.20, and §2800-2812:

§ 2500. Reporting to the Local Health Authority

  • § 2500(b) It shall be the duty of every health care provider, knowing of or in attendance on a case or suspected case of any of the diseases or condition listed below, to report to the local health officer for the jurisdiction where the patient resides. Where no health care provider is in attendance, any individual having knowledge of a person who is suspected to be suffering from one of the diseases or conditions listed below may make such a report to the local health officer for the jurisdiction where the patient resides.
  • § 2500(c) The administrator of each health facility, clinic, or other setting where more than one health care provider may know of a case, a suspected case or an outbreak of disease within the facility shall establish and be responsible for administrative procedures to assure that reports are made to the local officer.
  • § 2500(a)(15) "Health care provider" means a physician and surgeon, a veterinarian, a podiatrist, a nurse practitioner, a physician assistant, a registered nurse, a nurse midwife, a school nurse, an infection control practitioner, a medical examiner, a coroner, or a dentist.

Urgency Reporting Requirements [17 CCR §2500(h)(i)]

Reporting expectations are listed in calendar days unless otherwise mentioned.

✆! = Report immediately by telephone (designated by a ♦ in regulations).
 = Report immediately by telephone when two or more cases or suspected cases of foodborne disease from separate households are suspected to have the same source of illness (designated by a • in regulations).
 = Report by telephone within one working day of identification (designated by a + in regulations).
FAX ✆ ✉ = Report by electronic transmission (including FAX), telephone, or mail within one working day of identification (designated by a + in regulations).
WEEK = All other diseases/conditions should be reported by electronic transmission (including FAX), telephone, or mail within seven calendar days of identification.

Reportable Communicable Diseases §2500(j) 

Disease Name Urgency
Anaplasmosis WEEK
Anthrax, human or animal ✆!
Babesiosis FAX ✆ ✉
Botulism (Infant, Foodborne, wound, Other) ✆!
Brucellosis, animal (except infections due to Brucella canis) WEEK
Brucellosis, human ✆!
Campylobacteriosis FAX ✆ ✉
Chancroid WEEK
Chickenpox (Varicella) (outbreaks,hospitalizations and deaths) FAX ✆ ✉
Chikungunya Virus Infection FAX ✆ ✉
Cholera ✆!
Ciguatera Fish Poisoning ✆!
Coccidioidomycosis WEEK
Coronavirus Disease 2019 (COVID-19) ✆!
Creutzfeldt-Jakob Disease (CJD) and other Transmissible Spongiform Encephalopathies (TSE) WEEK
Cryptosporidiosis FAX ✆ ✉
Cyclosporiasis WEEK
Cysticercosis or taeniasis WEEK
Dengue Virus Infection FAX ✆ ✉
Diphtheria ✆!
Domoic Acid Poisoning (Amnesic Shellfish Poisoning) ✆!
Ehrlichiosis WEEK
Encephalitis, Specify Etiology: Viral, Bacterial, Fungal, Parasitic FAX ✆ ✉
Escherichia coli: shiga toxin producing (STEC) including E. coli O157 ✆!
Flavivirus infection of undetermined species ✆!
Foodborne Disease  FAX ✆ ✉
Giardiasis WEEK
Gonococcal Infections WEEK
Haemophilus influenzae, invasive disease, all serotypes (report an incident less than 5 years of age) FAX ✆ ✉
Hantavirus Infections FAX ✆ ✉
Hemolytic Uremic Syndrome ✆!
Hepatitis A, acute infection FAX ✆ ✉
Hepatitis B (specify acute, chronic, or perinatal) WEEK
Hepatitis C (specify acute, chronic, or perinatal) WEEK
Hepatitis D (Delta) (specify acute case or chronic) WEEK
Hepatitis E, acute infection WEEK
Human Immunodeficiency Virus (HIV), acute infection
Human Immunodeficiency Virus (HIV) infection, any stage WEEK
Human Immunodeficiency Virus (HIV) infection, progression to stage 3 (AIDS) WEEK
Influenza-associate deaths in laboratory-confirmed cases less than 18 years of age WEEK
Influenza due to novel strains (human) ✆!
Legionellosis WEEK
Leprosy (Hansen Disease) WEEK
Leptospirosis WEEK
Listeriosis FAX ✆ ✉
Lyme Disease WEEK
Malaria FAX ✆ ✉
Measles (Rubeola) ✆!
Meningitis, Specify Etiology: Viral, Bacterial, Fungal, Parasitic FAX ✆ ✉
Meningococcal Infections ✆!
Middle East Respiratory Syndrome (MERS) ✆!
Mumps WEEK
Novel Coronavirus Infection ✆!
Novel Virus Infection with Pandemic Potential ✆!
Paralytic Shellfish Poisoning ✆!
Paratyphoid Fever FAX ✆ ✉
Pertussis (Whooping Cough) FAX ✆ ✉
Plague, human or animal ✆!
Poliovirus Infection ✆!
Psittacosis FAX ✆ ✉
Q Fever FAX ✆ ✉
Rabies, human or animal ✆!
Relapsing Fever FAX ✆ ✉
Respiratory Syncytial Virus-associated deaths in laboratory-confirmed cases less than five years of age WEEK
Rickettsial Diseases (non-Rocky Mountain Spotted Fever), including Typhus and Typhus-like illnesses WEEK
Rocky Mountain Spotted Fever WEEK
Rubella (German Measles) WEEK
Rubella Syndrome, Congenital WEEK
Salmonellosis (Other than Typhoid Fever) FAX ✆ ✉
Scombroid Fish Poisoning ✆!
Shiga toxin (detected in feces) ✆!
Shigellosis FAX ✆ ✉
Smallpox (Variola) ✆!
Syphilis (all stages, including congenital) FAX ✆ ✉
Tetanus WEEK
Trichinosis FAX ✆ ✉
Tuberculosis FAX ✆ ✉
Tularemia, animal WEEK
Tularemia, human ✆!
Typhoid Fever, Cases and Carriers FAX ✆ ✉
Vibrio Infections FAX ✆ ✉
Viral Hemorrhagic Fevers, human or animal (e.g., Crimean-Congo, Ebola, Lassa, and Marburg viruses) ✆!
West Nile Virus (WNV) Infection FAX ✆ ✉
Yellow Fever FAX ✆ ✉
Yersiniosis FAX ✆ ✉
Zika Virus Infection FAX ✆ ✉
Occurance of any unusual disease ✆!
Outbreaks of any disease (Including diseases not listed in §2500). Specify if institutional and/or open community. ✆!

HIV Reporting by Health Care Providers §2641.30-2643.20

Human Immunodeficiency Virus (HIV) infection at all stages is reportable by traceable mail, person-to-person transfer, or electronically within seven calendar days. For complete HIV-specific reporting requirements, see Title 17, CCR, §2641.30-2643.20 and the California Department of Public Health’s HIV Surveillance and Case Reporting Resource page.

Reportable Noncommunicable Diseases and Conditions §2800–2812 and §2593(b)

  • Disorders Characterized by Lapses of Consciousness (§2800-2812)
  • Pesticide-related illness or injury (known or suspected cases)**
  • Cancer, including benign and borderline brain tumors (except (1) basal and squamous skin cancer unless occurring on genitalia, and (2) carcinoma in-situ and CIN III of the Cervix) (§2593)***


* Form CDPH 110a is designed for health care providers to report those diseases mandated by Title 17, California Code of Regulations (CCR). Failure to report is a misdemeanor (Health & Safety Code §120295) and is a citable offense under the Medical Board of California Citation and Fine Program (Title 16, CCR, §1364.10 and 1364.11).

** Failure to report is a citable offense and subject to civil penalty ($250) (Health and Safety Code §105200).

*** The Confidential Physician Cancer Reporting Form may also be used. See Physician Reporting Requirements for Cancer Reporting in CA.