A Southern California doctor has pleaded not guilty to writing more than 42,000 illegal prescriptions for powerful painkillers.
Dr. Daniel Cham of Covina entered pleas Thursday to federal charges of drug trafficking, money laundering, fraud and making false statements to authorities.
Prosecutors say Cham remains free on bond but he's in home detention and can't practice medicine.
A federal indictment claims that Cham wrote illegal prescriptions for drugs such as oxycodone at his medical offices in the Los Angelessuburbs of La Puente and Artesia.
Authorities say one occasion, Cham issued a prescription to an undercover agent who claimed he'd been high and drunk while receiving previous prescriptions.
Cham could face up to 339 years in federal prison if he's convicted of all 31 counts.