There's a new prescription pill for postpartum depression. How will coverage work?

Miriam McDonald spends time with her 4-year-old son, Nico. McDonald struggled to get care for postpartum depression at Kaiser Permanente, an experience that would eventually lead to significant policy changes by the health care provider. (Keith McDonald)

A much-awaited treatment for postpartum depression, zuranolone, hit the market in December, promising an accessible and fast-acting medication for a debilitating illness.

But most private health insurers have yet to publish criteria for when they will cover it, according to a new analysis of insurance policies.