On March 22nd, 2021

San Jose Physician Charged with Unlawfully Distributing Hydrocodone and Oxycodone Doctor Allegedly Wrote Opioid Prescriptions Without A Legitimate Medical Purpose to Multiple Undercover Agents Posing as Patients

“The California Department of Justice, Division of Medi Cal Fraud and Elder Abuse (DMFEA) works with local and federal investigators to combat health care fraud and the illegal distribution of powerful and addictive prescription medications,” said California Statewide Law Enforcement Association (CSLEA) President Alan Barcelona.  “This investigative work is needed in order to stop unscrupulous medical professionals from unlawfully contributing to this country’s prescription drug addiction problem.”


SAN JOSE – On March 19, 2021, Donald Siao facedd federal charges that he illegally distributed hydrocodone and oxycodone pills in his medical practice and committed health care fraud.

The federal complaint alleges that Siao, 55, of San Jose, is a medical doctor licensed by the state of California who conducted his practice in San Jose.  His license authorized him to write prescriptions for Schedule II through V controlled substances for medical care.  The complaint alleges that a prescription monitoring system identified Siao was a high prescriber, exemplified by a recent year when Siao wrote 8,201 prescriptions for controlled substances, including large quantities of hydrocodone and oxycodone and many instances of the dangerous combination of opioid, muscle relaxant, and benzodiazepine.  An investigation followed.

During the investigation, the complaint alleges that undercover law enforcement agents posed as new patients and met with Siao at his medical practice.  The complaint describes that during initial visits, the agents complained of pain in vague or general terms.  Siao conducted little or no physical examinations, the complaint alleges.  The initial and subsequent visits usually lasted approximately two minutes.  In initial visits Siao prescribed hydrocodone or oxycodone, and the complaint describes that in follow-up appointments Siao continued to prescribe the same medicine and increased the amounts. 

In one example in the complaint, an uncover agent posing as a patient met with Siao at an initial appointment and complained of pain.  Following an eight second physical examination, Siao wrote a prescription for 30 pills of Norco, a hydrocodone-acetaminophen combination.  In subsequent visits as short as 2 minutes and 10 seconds, the undercover agent requested larger prescriptions for reasons that included he had given away pills to his employees as work incentives and that he had ran out of pills when he went to a concert.  Siao increased the size of the prescriptions, eventually writing a prescription for 90 Norco pills at his last visit.  In another example in the complaint, an undercover agent requested and received a larger prescription of Norco so he could pay back friends with the pills.  The agent then requested a prescription for Marinol, explaining he would not take the Marinol but rather would display the prescription at work as a pretext for his positive drug tests, saying “that way it covers the dirty drug test.”  Siao replied “gotcha” and wrote the prescription.

The complaint also charges Siao with health care fraud and alleges that on May 9, 2018, he wrote alprazolam and oxycodone prescriptions for a patient without any legitimate medical purpose.

Siao is charged with three counts of illegal distribution of hydrocodone and one count of illegal distribution of oxycodone.  If convicted of any of these counts, he faces a maximum penalty of 20 years in prison and a maximum fine of $1,000,000.  Siao is also charged with two counts of health care fraud.  If convicted of either of these counts, he faces a maximum penalty of 10 years in prison and a maximum fine of $250,000. 

The charges contained in the criminal complaint are allegations.  As in any criminal case, the defendant is presumed innocent unless and until proven guilty in a court of law.

This prosecution is the result of an investigation by DEA, FBI, HHS-OIG, and DMFEA.  Through DMFEA, the California Department of Justice regularly works with other law enforcement agencies to investigate and prosecute fraud perpetrated on the Medi Cal program against a wide variety of healthcare providers, including doctors and pharmaceutical companies.  Through DMFEA’s civil and criminal enforcement efforts, the Attorney General has recovered tens of millions of dollars from and secured the convictions of hundreds of Medicaid providers who violate California laws through fraudulent and wrongful practices. 

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