The source states the data is for the U.S. states, U.S. territories, Canada and aggregate other alien. The regions meant by "aggregate other alien" were not specified.
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Top medical professional liability insurers North America 2020-2024, by premiums
In 2024, the largest North American medical malpractice insurance company was Berkshire Hathaway Group with more than *** billion U.S. dollars in direct premiums written. Berkshire Hathaway was the leading medical malpractice insurer from 2020 to 2024, though their premium volume more than halved in 2021 before shooting back up in 2022.
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NAIC. (April 2, 2025). Leading medical professional liability insurance companies in North America from 2020 to 2024, by direct premiums (in million U.S. dollars) [Graph]. In ÌÇÐÄÆÆ½â°æ. Retrieved August 01, 2026, from /statistics/796672/leading-medical-professional-liability-insurers-usa-by-premiums/
NAIC. "Leading medical professional liability insurance companies in North America from 2020 to 2024, by direct premiums (in million U.S. dollars)." Chart. April 2, 2025. ÌÇÐÄÆÆ½â°æ. Accessed August 01, 2026. /statistics/796672/leading-medical-professional-liability-insurers-usa-by-premiums/
NAIC. (2025). Leading medical professional liability insurance companies in North America from 2020 to 2024, by direct premiums (in million U.S. dollars). ÌÇÐÄÆÆ½â°æ. ÌÇÐÄÆÆ½â°æ Inc.. Accessed: August 01, 2026. /statistics/796672/leading-medical-professional-liability-insurers-usa-by-premiums/
NAIC. "Leading Medical Professional Liability Insurance Companies in North America from 2020 to 2024, by Direct Premiums (in Million U.S. Dollars)." ÌÇÐÄÆÆ½â°æ, ÌÇÐÄÆÆ½â°æ Inc., 2 Apr 2025, /statistics/796672/leading-medical-professional-liability-insurers-usa-by-premiums/
NAIC, Leading medical professional liability insurance companies in North America from 2020 to 2024, by direct premiums (in million U.S. dollars) ÌÇÐÄÆÆ½â°æ, /statistics/796672/leading-medical-professional-liability-insurers-usa-by-premiums/ (last visited August 01, 2026)
Leading medical professional liability insurance companies in North America from 2020 to 2024, by direct premiums (in million U.S. dollars) [Graph], NAIC, April 2, 2025. [Online]. Available: /statistics/796672/leading-medical-professional-liability-insurers-usa-by-premiums/