Yes and no.
The NHL
had three high-profile deaths last summer of former enforcers - Rick Rypien of the Vancouver Canucks, Derek Boogaard of the NY Rangers, and Wade Belak of the Nashville Predators. All three had struggles with depression, Rypien being the most public as he'd taken considerable amounts of time off from the team during his tenure with Vancouver to deal with things. Of the three, Belak and Rypien committed suicide, while Boogard died of a drug overdose.
Also overshadowing the concussion discussion in the NHL - the league's poster boy, Sidney Crosby. Gone for most of the year with sever post concussion symptoms, you literally couldn't go two days over the past 11 months without sue sort of update/conjecture on radio and television as to when or if he would return to the game.
Taking all that into account, the league disciplinarian Brendan Shanahan pledged to make suspensions stiffer for headshots coming into this season, and to his credit, he did at first. But as the season progressed, suspensions became more and more lax until we were basically right back where we started. See
this and
this for examples that should have been treated more seriously, but either were given a minimal suspension or none at all.
It wasn't until the hue and cry about hockey violence in the playoffs got into the mainstream press that Shanahan did anything even close to the bar he'd set in the preseason, hitting multiple-offender Raffi Torres with a 25 game suspension for
this hit on Marian Hossa. Basically a slam dunk made on severity of the injury as opposed to actual intent - it was arguably a good hockey play that went OTT.
So yeah, the NHL has its own concussion controversy going on, but they're not taking it anywhere near as seriously as the NFL.