A few health insurers monopolise US marketBMJ 2006; 332 doi: http://dx.doi.org/10.1136/bmj.332.7548.992-c (Published 27 April 2006) Cite this as: BMJ 2006;332:992
- Janice Hopkins Tanne
- New York
Mergers between health insurance companies have created virtual monopolies that limit consumer choice, do not offer savings on premiums, and give doctors little or no bargaining power, a report from the American Medical Association claims. The past decade has seen more than 400 mergers among health insurance companies and managed care organisations, says the report, which analysed the insurance markets in nearly 300 metropolitan areas.
As of 2005, in 95% of these metropolitan areas, one insurer had at least a 30% market share. In 56% of areas, one insurer had more than half the …
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