At least eight leaders behind Walmart’s push into the health-clinic business have left the company since early 2020, and another is leaving in May.

Walmart launched its first comprehensive health center in September 2019 and now has about 20 of them attached to Walmart stores in four states, including Arkansas, Georgia, Illinois and Florida. The clinics were Walmart’s attempt to get serious about healthcare, compete with other retailers like CVS Health, and capture some of the $3.8 trillion industry.

Some heralded the Walmart Health clinics as a game changer. They sought to disrupt an industry notorious for opaque pricing by offering transparent prices for an array of services, including primary care, dental exams, vision tests, counseling, X-rays, and diagnostics. Seeing a doctor at Walmart’s clinics costs $40, even for patients without insurance.