UnitedHealth vs CVS Health: Which Is the Better Buy in 2026?

UnitedHealth's Optum segment earns from healthcare services regardless of what happens to insurance margins — it operates physician practices, pharmacy benefit management, and health IT. CVS's three-part model (retail pharmacy, Aetna insurance, health clinics) faces the challenge that the retail pharmacy core is in secular decline while the insurance segment competes in increasingly competitive markets. The integration thesis is similar, but UnitedHealth's execution is more advanced and Optum's growth makes the math more compelling.

UnitedHealth's Optum segment is the most important part of this comparison — it's not just an insurer, it's a healthcare services and data analytics business growing independently of insurance margins. Optum earns from pharmacy benefit management, physician practices, surgical centers, and health data analytics. CVS is trying to build a similar vertically integrated model through Aetna insurance and MinuteClinics, but the retail pharmacy business is facing structural headwinds from mail-order and declining foot traffic that UnitedHealth's Optum doesn't carry. UnitedHealth's model is further along the vertical integration curve with better margin trajectory.