Carter underwent surgery on Tuesday on the long-term injury after the All Blacks wrapped up this year's Tri-Nations championship with a 29-22 victory over South Africa last weekend.
He had been troubled by the ankle for more than three months and it started to become more of an aggravation towards the end of the Super 14 competition.
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"I miss one international game, all going well," he said referring to the All Blacks final Tri-Nations game against Australia in Sydney on September 11.
"Obviously the bigger picture is next year (World Cup) and I'm just concentrating on getting it done and doing the rehab and bouncing back from that."
