Physicians are responsible for reporting cancer diagnoses for patients whom do not undergo diagnostic procedures or treatment for their cancer or brain tumors at a hospital or other cancer-reporting facility in California. The regional cancer registries, operating under the authority of the Department of Public Health (CDPH), are responsible for abstracting required data items from the reporting physician’s records. Confidentiality of data collected is strictly maintained in accordance with Health and Safety code Sections 100330 and 103885; civil code, Sections 56.05 and 1798; Government Code Sections, 6250-6265; and Federal Law PL 104-191.