A battle is beginning to brew between some members of the City Council and one of the city’s most influential labor unions.

The fight is over how the city provides health benefits to retired municipal employees.

Labor leaders are in support of the Adams administration’s push to replace traditional Medicare coverage for retired city employees with a Medicare Advantage plan that would cut an estimated $600 million in health care costs each year.

But a new bill by Brooklyn Council member Charles Barron would lock the current plan in place by law.

Henry Garrido, the executive director of District Council 37, the city’s largest public employee union, joined NY1 political anchor Errol Louis on “Inside City Hall” Friday night to discuss his opposition to the legislation.