Private equity firm Clayton Dubilier & Rice has acquired a majority stake in Seattle-based startup Vera Whole Health, the companies announced today. The deal values Vera at $400 million. Vera partners with employers to deliver “advanced primary health” through an integrated team of primary care physicians, nurses, and health coaches though clinics that are often in close proximity to workspaces. The company employs an increasingly popular healthcare model: it charges a per-month, per-person membership fee. The approach simplifies billing and changes incentives in the medical system, with its fee-for-service approach and fragmented communication between specialists and primary care providers.