Megna signed a one-year, $700,000 deal with the Golden Knights on Monday.
Megna was sent down to AHL San Diego on Sunday.
Megna recorded one shot on goal and also dished out a hit in Wednesday's 3-0 loss to Winnipeg.
Megna was called up from AHL San Diego on Thursday, Elliott Teaford of The Orange County Register reports.
Megna was placed on waivers by the Ducks on Thursday.
Megna was a healthy scratch for Friday's 5-3 loss to Nashville on Friday.
Megna has averaged just 14:16 of ice time through three games this season. He's also been a healthy scratch for three contests.
Megna signed a two-year, two-way contract extension with the Ducks on Thursday. Financial terms of the deal were not immediately disclosed.
Megna was reassigned to AHL San Diego on Tuesday.
The Ducks recalled Megna from AHL San Diego on Thursday.