How many NHL penalties lead to misconduct?

Answer 1

A ten minute penalty to be served consecutively with other penalties given at the time of the infraction.

A Game misconduct penalty, while a ten minute major, depending on the infraction and the extent of possibly injure to a player the offending player may also be assessed a Game Misconduct-Match Penalty, meaning the player is disqualified (ejected) from the game.

However, a Game Misconduct nor a Match penalty is require for a player to be disqualified. A player can be DQ'd on a five minute major penalty for certain infractions.

Answer 2

One, Fighting or boarding.