Chances are the role will become that of stand-in captain, with Lanning not guaranteed to return from personal leave ahead of a December T20 series in India.
Australia will also play a home game against Pakistan in January, ahead of a Twenty20 World Cup in South Africa in February.
Lanning took an indefinite leave of absence following the success of the Commonwealth Games in Australia in August, and is believed to be abroad, while confirming she will not be playing in the WBBL this summer.
Healy has long been considered a frontrunner for the role, having led NSW at the state level for the past four years and serving as Australia’s deputy captain last summer.
“It’s a privilege to be offered the vice-captain of an Australian team, let alone a team that has tasted as much success as this,” said Healy. “Rach played a key role in supporting Meg and driving the team’s values and culture and while she has big shoes to fill, I look forward to helping lead this side with Meg and Shell.
“It’s a very exciting time to be involved with this team; we’ve seen staff changes and also the emergence of incredible young talent, and with a T20 World Cup and from Ashes just around the corner, I’m looking forward to this next chapter of My career.”
Healy’s appointment comes as Australia faces a changing of the guard in the coming seasons.
The 32-year-old has spoken publicly about how she too has been thinking about her future in recent months, while Ellyse Perry is another superstar over 30.
Shelly Nitschke was named the team’s new full-time coach last month, having previously served as interim coach following the departure of Matthew Mott.
CA also confirmed on Thursday that Dan Marsh and Scott Prestwidge would become its new assistants, and Ben Sawyer has also left to take on the New Zealand women’s team.
“We are delighted that Alyssa has agreed to take on the role of Vice Captain and look forward to the contribution she can make alongside Meg,” said Chief Selector Shawn Flegler. “Alyssa is an outstanding leader on and off the field and brings a wealth of experience.
“We have great confidence in Alyssa, Meg and Shelley leading the team during an exciting 12-month period as the team will defend its T20 World Cup title and strive to keep the Ashes on English soil.”