Case counts of people newly reported with chronic hepatitis B
Hepatitis B surveillance data include all confirmed and probable cases. The Health Department often receives more than one report for each person with chronic hepatitis B and uses automatic de-duplication methods to identify repeat reports based on name, date of birth, and other information. Only the first report is counted in the data presented here. Laboratories are required to electronically report positive hepatitis B test results, as well as negative results for hepatitis B DNA. The Health Department does not routinely investigate hepatitis B reports because of the large volume; therefore it is difficult to determine when people with these infections were first infected, although most were probably infected a while ago. Case counts represent people newly reported with hepatitis B and are not prevalence or incidence. Many people with hepatitis B are asymptomatic; as a result, many cases are not diagnosed or reported. Therefore, surveillance data underestimate the true level of chronic hepatitis B in NYC.

The Hepatitis category in NYC Health Map provides a list of facilities for the public and service providers looking for prevention services, testing, and treatment for hepatitis B and C. Due to shared risk factors, people living with HIV should get the Hep B vaccine, and should get tested for both Hep B and C. The programs listed have been verified by the NYC DOHMH.

The Viral Hepatitis Program in the Bureau of Hepatitis, HIV and STI contracts with organizations in the city to provide peer navigation and patient navigation for Hep B and C. These agencies and their hepatitis services are listed in the NYC Health Map for public use. The Hepatitis list also includes agencies contracted by the New York State Health Department to provide Hep C testing, care and treatment, and agencies participating in the Hep Free NYC network. This list is maintained in a database by Viral Hepatitis Program staff and is updated once a year. It does not capture all hepatitis B and C services available in New York City. The data is organized by service type, and each record represents a service offered at a single location. Hepatitis A vaccine information is kept separately in the Vaccines list managed by the Bureau of Immunizations.