Why Your Medical Bills Keep Rising: The Power of Hospital Monopolies

Following up on our August 2026 report regarding the impact of hospital monopolies, new data has provided a clearer look at how these large systems influence the cost of your medical care. For many years, it was difficult to see exactly how much hospital mergers—the joining of two or more companies into one—drove up prices. However, since 2021, the Centers for Medicare & Medicaid Services has required hospitals to disclose their prices. This new transparency allows us to see how a lack of competition in local areas leads to significantly higher bills for patients.

According to data from Serif Health, a startup that analyzes hospital pricing, the cost of a standard knee replacement can vary wildly depending on where you live. For example, at Catawba Valley Medical Center in Hickory, North Carolina, the cost for the procedure under a Blue Cross Blue Shield plan was about $16,000. Yet, at Mission Hospital in Asheville, which was formed by the merger of the region’s two largest hospitals, the cost for the same procedure under the same insurance plan was around $40,000. This is more than double the price, and experts say the difference is largely because Mission Hospital faces very little competition in its area.

This pattern is not limited to North Carolina. The Serif Health data shows similar trends across the United States. In Florida, the Holmes Regional Medical Center is part of a system that dominates Brevard County. This center has charged insurance companies twice as much as a hospital located two hours to the north for the same knee surgery. Likewise, in Colorado, the Banner North Colorado Medical Center, which is the leading provider in Weld County, charged a UnitedHealthcare patient $20,000 more for the surgery than a health system located an hour away in Denver.

Why does this matter to you, even if you do not need surgery? When hospitals charge these high prices, insurance companies must pay more to cover the bills. To stay profitable, these insurance companies then pass those costs on to everyone by raising the prices of monthly health insurance premiums. As a result, the growth of hospital monopolies affects the financial health of the entire community, not just the patients who walk through the hospital doors.

Economists have long suspected that the wave of hospital mergers, which saw over 1,000 such deals take place between 2002 and 2020, was a major reason for rising healthcare costs. Before the recent government rules on price disclosure, hospitals did not advertise their rates. Even when patients received a bill, they often did not notice the total cost because insurance covered most of it. Now that the data is public, the link between market power and high prices is becoming impossible to ignore.

Not everyone agrees on the impact of these mergers. The American Hospital Association has argued that combining hospitals can actually improve the quality of care and reduce costs by creating a more stable financial environment. A spokesperson for Mission Hospital also noted that comparing prices between different hospitals can be misleading. They explained that every hospital has different practices, constraints, and costs that make direct comparisons unfair.

Despite these arguments, the evidence from the latest data suggests that when a single system controls the market, it gains the power to demand higher payments. As these large systems continue to grow, the debate over how to balance hospital sustainability with affordable patient care will likely remain a central issue in the U.S. healthcare system. For now, the new transparency rules serve as a vital tool for patients and researchers to understand exactly what they are paying for and why.