Drug Enforcement Administration

Los Angeles

David Downing, Special Agent in Charge

February 05, 2016

Contact: SA Timothy Massino

Phone Number: (213) 621-6700

Doctor Receives 30 Years To Life In Prescription Drug Overdose Case

LOS ANGELES - A Rowland Heights doctor was sentenced to 30 years to life in state prison for prescribing large amounts of addictive and dangerous drugs to patients with no legitimate need, three of whom died of overdoses.  Hsiu Ying “Lisa” Tseng, 46, was sentenced by Los Angeles County Superior Court Judge George Lomeli.

In October 2015, a jury found Tseng guilty of three counts of second-degree murder, 19 counts of unlawful controlled substance prescription, and one count of obtaining a controlled substance by fraud.  Tseng was convicted for the deaths of Vu Nguyen, 28, of Lake Forest; Steven Ogle, 24, of Palm Desert; and Joseph Rovero, 21, an Arizona State University student from San Ramon.  Nguyen died March 2, 2009.  Ogle died a month later on April 9 and Rovero died on Dec. 18 in the same year.  All were patients of Tseng, who prescribed a myriad of drugs for the three young men.

Tseng, licensed to practice in 1997, opened a storefront medical office in Rowland Heights in 2005.  During the time frame when nine of her patients died in less than three years, Tseng took in more than $5 million from her clinic and continued dispensing potent and addictive drugs unabated.  Tseng sometimes kept no medical records of visits or patient prescriptions.  In many instances, she faked medical records when authorities began investigating.  Tseng has remained in custody since March 2012.

Los Angeles County Deputy District Attorneys John Niedermann and Grace Rai of the Major Narcotics Division prosecuted the case, which was the result of an investigation conducted by the DEA and the California Medical Board.

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