The N.F.L. ended its seven-year fight with an insurance company that had refused to cover its portion of the costs of the league’s more than $1 billion settlement reached in 2013 with retired players found to have cognitive and neurological problems.

The N.F.L. and Westport Insurance Corp. settled for an undisclosed amount, according to a filing in the New York State Supreme Court.

The concussion settlement has produced more than $600 million in claims so far. Players are paid up to $5 million depending on their type of cognitive or neurological problem, which can include A.L.S. and Alzheimer’s disease, and their age at the time their illness was diagnosed.

Because the retired players accused the N.F.L. of fraud, not just negligence, for deliberately hiding the dangers of concussions from them, the insurers argued that they did not have to cover the league’s legal costs or the payments from the settlement, which was finalized in 2015.