Nassar already faced a lifetime in jail for two prior sentences for sexually abusing girls at USA Gymnastics and Michigan State University.
The judge said while it ends Nassar's criminal legal proceedings, "it does not end the emotional and physical suffering he has caused".
The number of women who accuse Nassar of abuse has grown to more than 265.
With Monday's sentence, Nassar has now been given at least 300 years in jail for his crimes.
