Rodgers-Cromartie was confident the team would let him return as early as this week after being suspended indefinitely on Thursday.
The Pro Bowl cornerback met with Giants coach Ben McAdoo early Tuesday.
By missing one week, Rodgers-Cromartie lost $410,588.
McAdoo told broadcasters for Sunday's game that there were four separate incidents that led to his decision to suspend Rodgers-Cromartie but would not elaborate when pressed on the subject by other reporters.
Rodgers-Cromartie later walked out of a meeting Wednesday, which prompted an indefinite suspension from the Giants.
Rodgers-Cromartie confirmed to ESPN's Josina Anderson that he has been reinstated by the team.
Giants teammates, such as Jason Pierre-Paul, said they believed Rodgers-Cromartie would be back this week, but McAdoo would not say anything until he had a conversation with his suspended corner.
NY waived cornerback Michael Hunter to make room for Rodgers-Cromartie on the team's 53-man roster.
The Giants will now have to make a subsequent roster move to clear a spot for Rodgers-Cromartie on their 53-man roster, which could be the release of the aforementioned Deayon.
The Giants played their best defensive game of the season in Rodgers-Cromartie's absence, shocking the Broncos 23-10 on Sunday night.
The unit forced two interceptions, including a pick-six from Janoris Jenkins.