Reports suggest Inter will pay an initial €3 million to bring him to Milan on loan until the summer, when they will have an option to make the move permanent by paying another €35 million (plus performance-related bonuses) to the Blaugrana.
The arrival of his fellow countryman Philippe Coutinho within the Barcelona ranks for a club record £140m fee means that the 24-year-old looks set to end a 12 year relationship with the club as he hopes to battle his way into the national team ahead of the summer's World Cup in Russian Federation. However, if the 4th-placed Nerazzurri achieve Champions League qualification, the option to buy will become compulsory.
That was the first action he had seen this season, with knee surgery having kept him sidelined since picking up an untimely knock in April 2017.
His father and former Brazilian global Mazinho said his son's goal is to get regular playing time ahead of this summer's World Cup.
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"Rafinha's objective is just to play", Mazinho, Rafinha's father, told Diario Sport.
"It's very hard to get into the Barcelona side as there are so many players". There are a lot of good players [in his position] and it's been similar for five years now. He also had the bad luck of getting that knee injury over the last two years. Rafinha hopes to regain his form with Inter in order to join the Brazil squad for the 2018 World Cup in Russian Federation.
Rafinha was in the stands as his new team-mates drew 1-1 at home to Roma on Sunday and will no doubt be keen to help his new side push on.