German doping doctor Mark Schmidt has appealed the four-year and ten-month prison sentence imposed by the Munich court two weeks ago.
According to the lawyer of 42-year-old Schmidt, his client has not received a fair trial.
Justice previously decided not to appeal, even though the prosecution had demanded a higher prison sentence (5.5 years).
Schmidt is seen as the pivot in the doping affair that bears the name 'Operation Aderlass'.
The sports doctor from Erfurt admitted during the trial that he had performed illegal blood transfusions on many athletes, especially cross-country skiers and also some cyclists, including Alessandro Petacchi, Stefan Denifl and Georg Preidler.
In addition to a prison sentence, the court also imposed a three-year professional ban.
The case came to light two years ago in a raid during the World Cup Nordic numbers.
Schmidt was arrested in his hometown Erfurt after house searches and has been in police custody ever since.
Four accomplices of the sports doctor have also been found guilty of drug and anti-doping law violations.
Two of them were sentenced to prison, the other two fined.
Austrian cross-country skier caught red-handed during blood transfusion