The Affordable Care Act requires insurers to cover a variety of preventive services without a patient paying out-of-pocket, but it is not uncommon for medical practices to narrowly interpret the term "preventive service."

A coalition of nearly 20 financial industry trade groups, including the Financial Services Institute and the Insured Retirement Institute, says a 60-day comment period is not enough time to comment on the 500-page proposal.

Tirzepatide, the active ingredient in Lilly's new drug, is already approved under the trade name Mounjaro, a diabetes drug, but Zepbound will list for a lower pre-insurance price than Novo Nordisk's weight loss drug, Wegovy.