California expands the duty to warn patients exposed to and infected with HIV. Reisner v. Regents of the University of California.

There is still no general definitive guide for hospitals and other health care providers concerning the extent of their duty to warn third parties of a patient's HIV status. However, even in states like California that have statutorily eliminated any duty to directly inform third parties, the Reisner case clearly indicates that liability to third parties may arise indirectly based on a failure to warn HIV-exposed or -infected patients of their status and the risks of communicating the virus to others. Accordingly, health care providers should take several actions: 1. Ascertain, with the assistance of legal counsel, the precise dictates of applicable state statutes and case law regarding (a) a provider's obligation to warn HIV-exposed or -infected individuals of the potential of communicating the virus to others; (b) additional statutory requirements such as notification of public health authorities; and (c) whether notice to third parties at risk of exposure from the patient is required or even permitted. 2. Develop and implement written policies regarding notification and counseling of exposed or infected patients, including counseling patients on the risks of communicating the virus to third parties; and 3. Develop and implement written policies regarding permissive or mandatory notification and counseling of exposed or infected third parties. In this context, providers should be aware that patient confidentiality and privacy laws may prohibit disclosure of the identity of exposed or infected patients to third parties.