Nichushkin's suspension was a mandatory penalty for entering Stage 3 of the Player Assistance Program. According to Daily Faceoff's Frank Seravalli, Nichushkin is believed to have failed a drug test. Elliotte Friedman confirmed the report during intermission of tonight's Rangers/Hurricanes game.
Per TSN's Chris Johnston, as a result of his placement in the program, Nichushkin will be suspended without pay for the next 6 months and will be able to apply for re-instatement following the 6 month ban.