Jasna Mrdjen, 74, was convicted of involuntary manslaughter. Prosecutors say in 2012 she prescribed hundreds of powerful pills to a patient who had just gotten out of rehab.
The patient died from a combination of drugs.
The investigation into Mrdjen showed she was writing excessive, high-dosage prescriptions for addictive narcotics.
Some of her patients were arrested for reselling her prescribed drugs for a profit.