According to the IMDb, it is the only episode so far:
Unlike in any previous episode, there is a 'stinger' scene, ie. after the end credits are completely over.
After this epsiode, there was another season 5 episode with a stinger scene: S05E08
From the IMDb:
Just like in the season premiere, there is a 'stinger' scene (actually several scenes), ie. after the end credits are completely over.
Together, the stingers complete each other, being the only segments in the first half of season 5 to feature a character that has been absent for a long time.
This is the second Walking Dead episode to contain an after credits scene, and, as of Episode 4x08, the longest.