Lawmakers in New York in June approved wide-ranging legislation designed to require pricing transparency from PBMs and to eliminate key PBM practices. But the bill could potentially limit plans’ ability to respond to pricing moves by manufacturers, one consultant tells AIS Health.

The New York bill (S.B. 6531) would require that PBMs disclose key pricing and rebate information and pass through all rebates and discounts to the plans and payers, and that they act in the best interests of the covered individual and the health plan or provider.

The New York Health Plan Association, which did not support the legislation, is particularly concerned with the “best interests” section, which imposes a fiduciary relationship on PBMs “in all but name,” says Ashley Stuart, director of government affairs for the association.

The legislation also would prohibit mid-year formulary changes and drug substitutions, and it would require PBMs operating in the state to be licensed beginning next year.

Josh Golden at Arthur J. Gallagher & Co.’s Solid Benefit Guidance says, “formulary strategies are designed to help keep drug costs in check. In moving forward with this legislation, the state potentially limits the ability of health plans to apply pricing pressure on pharmaceutical manufacturers throughout the year.”

More generally, the legislation will lead to higher health insurance premiums for employers and consumers, warned New York Health Plan Association President and CEO Eric Linzer in a statement.

The legislation comes at a time when several states are considering efforts to rein in PBMs. “At least four or five states are looking at the impact of Medicaid [pharmacy benefit] price transparency,” says Alex Shekhdar, founder of Sycamore Creek Healthcare Advisors. “It goes back to the larger fundamental conversation of what states should be looking at — they recognize there’s money under the table, especially in the PBM space.”