How the Tarasoff Ruling Reshaped Doctor-Patient
Get the Health newsletter
Daily health & science — research, biotech, public health, the studies worth knowing. Free.
- Tarasoff v. Regents of University of California was decided July 1, 1976, codifying the "duty to warn" and "duty to protect" after a California Supreme Court rehearing that had originally ruled on the case in 1974.
- Prosenjit Poddar told UC Berkeley psychologist Lawrence Moore in August 1969 that he planned to murder Tatiana Tarasoff, but Cowell Memorial Hospital psychiatry director Harvey Powelson overruled a proposed 72-hour hold, ordered Moore to destroy his letter and notes, and instructed staff against further involuntary commitment attempts.
- Poddar killed Tatiana on Oct. 27, 1969, first shooting her with a pellet gun and then stabbing her 17 times with a butcher knife; he was convicted of second-degree murder, had the charge reduced to manslaughter on appeal, and was deported to India after roughly four years.
- The 1976 decision held that "the protective privilege ends where the public peril begins" and that psychiatrists are held to the same standard as any other medical practitioner in predicting and preventing foreseeable violence.
- Tarasoff subsequently underpinned HIV/AIDS partner notification programs during the early epidemic, Covid-era contagion notification, and genetic risk warnings to family members in cases including Pate v. Threlkel (1995) and Safer v. Estate of Pack (1996).
- Therapists today are required to disclose at the outset of treatment that they will report patient threats to police, and clinicians in some jurisdictions can face liability for failing to warn identifiable third parties — including family members — of foreseeable harm.
Why it matters: Every modern therapy intake now includes the disclosure that threats will be reported to police — a direct legacy of Tarasoff. The ruling's reach extends well beyond psychiatry: it underwrote HIV partner notification in the 1980s-90s, Covid contagion protocols, and genetic duty-to-warn cases where physicians must alert a patient's children of inherited disease risk. A 1976 California decision now governs how clinicians across specialties balance confidentiality against third-party safety.
Ask SkimNews
