The Medical Board of California says Murray's license was automatically suspended as of the date of his incarceration.
In November, an L.A. Superior Court judge sentenced Murray to four years in jail - the maximum sentence for his conviction. Murray was immediately taken into custody.
The Medical Board sent Murray a letter late last week officially notifying him of the suspension and saying he has 15 days to hand over paper copies of his license.
Murray is fighting the manslaughter conviction. He's expected to serve about two years behind bars.
