The supermodel was spotted wearing a brace on her right leg and walking with the support of crutches in London on Saturday.
Moss, 42, walked alongside beau Count Nikolai von Bismarck, and still managed to look chic in a gray and black-striped shirt, gray blazer, black pants and black boots. Ladies of London's Annabelle Neilson was also spotted with the group.
The brace and crutches comes just after the duo were spotted on the slopes of a Verbier ski resort in Switzerland. Reps for Moss did not immediately respond to a request for comment.
Moss has been linked to Bismarck – a descendant of the noble German family – since the fall, with U.K.'s The Telegraph explaining that the pair know each other through Bismarck's mother, Countess Debonnaire von Bismarck. He has also served as an assistant to famed fashion photographer Mario Testino.
Moss reportedly split from husband Jamie Hince last July, although it is unclear if either have formally filed divorce papers.