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UnitedHealth Group sells health insurance to millions of people and also runs a fast-growing healthcare services business that manages drugs, clinics, and payments for doctors.
UnitedHealth Group is really two big businesses wearing one name. The first is UnitedHealthcare, which sells health insurance — mostly in the United States — to employers who cover their workers, to people on government programs like Medicare for seniors and Medicaid for lower-income families, and to individuals buying their own plans. Customers pay premiums every month, and when they go to the doctor, the company pays the bill (after deducting its costs and profit). Think of it as a giant membership club for healthcare: you pay dues, and the club handles the medical bills.
The second business, Optum, is the part that surprises people. Optum doesn't sell insurance — it sells services to the healthcare system itself. One piece runs a huge pharmacy benefit manager, which negotiates drug prices for insurers and employers. Another piece employs tens of thousands of doctors and runs clinics and surgery centers. A third piece sells software and data analytics to hospitals and health plans. Roughly half of the company's profit now comes from Optum, which is growing faster than the insurance side and is the main reason UnitedHealth has become one of the largest companies in America, with annual revenue well over $400 billion.
The company is headquartered in Minnetonka, Minnesota, and traces its roots to a group of doctors in the 1970s who wanted to make healthcare more organized, though today it operates everywhere. It's been a major acquirer — buying pharmacy giant Catamark in 2015, dialysis and clinic groups, and a large home-health company — using its enormous cash flow to expand Optum's reach. That growth has attracted regulatory attention, especially over how a company can both sell insurance and own the doctors and drug middlemen that insurance pays. In recent years, the company has also faced public backlash over denied claims, a high-profile cyberattack on its pharmacy processing unit, and a leadership shakeup. Still, the basic machine keeps running: collect premiums, negotiate with providers, and sell tools and services to everyone else in healthcare.
Saved answer · last researched 16 Oct 2026