Her management have confirmed she will need surgery to have the issue cleared up and that could occur later in the year.
The final event on the LPGA Tour will take place in late November.
After the Evian, Ko held on to her No3 world ranking, while she remained in third place on the CME Globe Standings, which is the season-long points race on the LPGA Tour.
Ko's impending surgery may put a question mark over her playing in next year's New Zealand Women's Open at Clearwater in Christchurch.
The dates for the 2015 event will likely be confirmed this month and it's understood the tournament may be held in late February.
This year's tournament -- where Ko finished second -- was held in early February.
If Ko was to have surgery in December and had any complications with her recovery, an appearance at Clearwater could be in doubt given that the procedure was expected to put her out of golf for two months.
The teenager is the main attraction at the tournament and huge crowds followed her during the final round of this year's event.