In 2022, the largest North American medical malpractice insurer was Berkshire Hathaway Group with a market share of almost 20 percent. Medical malpractice insurance protects healthcare providers from claims filed by their patients (or the patients’ family members) alleging that their negligent acts injured or caused the death of the patient. This is a type of professional liability insurance. The most populous states are, unsurprisingly, where the bulk of these insurance products are sold.
Berkshire Hathaway is the clear market leader
Berkshire Hathaway Group wrote direct medical professional liability insurance premiums worth over two billion U.S. dollars in 2022. Doctors Co Group and Proassurance Corp Group were the second and third largest medical malpractice insurers, respectively, but their combined direct premiums equaled less than those written by Berkshire. This indicates that Berkshire is likely to remain the market leader in the near future, unless another company dramatically increases their medical malpractice insurance operations.
Leading medical professional liability insurance companies in North America from 2020 to 2022, by market share
Characteristic
2020
2021
2022
Berkshire Hathaway Group
17.11%
13.97%
18.38%
Doctors Co Group
9.6%
-
9.71%
Proassurance Corp Group
4.35%
6.58%
6.17%
CNA Insurance Group
6.08%
12.25%
5.48%
Coverys Group
5.21%
-
4.53%
MCIC Vermont
4.24%
-
3.96%
MagMutual Insurance Group
3.68%
8.02%
3.8%
Liberty Mutual Group
2.62%
-
2.83%
Chubb Ltd Group
-
3.86%
1.8%
WR Berkley Corp Group
-
3.55%
1.74%
MMIC Group
1.72%
3.6%
-
Alleghany Group
-
2.95%
-
Curi Holdings Group
-
3.06%
-
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The market share is based on direct premiums written. 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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NAIC. (March 27, 2023). Leading medical professional liability insurance companies in North America from 2020 to 2022, by market share [Graph]. In Statista. Retrieved February 19, 2025, from https://www.statista.com/statistics/796680/leading-medical-professional-liability-insurers-usa-by-market-share/
NAIC. "Leading medical professional liability insurance companies in North America from 2020 to 2022, by market share." Chart. March 27, 2023. Statista. Accessed February 19, 2025. https://www.statista.com/statistics/796680/leading-medical-professional-liability-insurers-usa-by-market-share/
NAIC. (2023). Leading medical professional liability insurance companies in North America from 2020 to 2022, by market share. Statista. Statista Inc.. Accessed: February 19, 2025. https://www.statista.com/statistics/796680/leading-medical-professional-liability-insurers-usa-by-market-share/
NAIC. "Leading Medical Professional Liability Insurance Companies in North America from 2020 to 2022, by Market Share." Statista, Statista Inc., 27 Mar 2023, https://www.statista.com/statistics/796680/leading-medical-professional-liability-insurers-usa-by-market-share/
NAIC, Leading medical professional liability insurance companies in North America from 2020 to 2022, by market share Statista, https://www.statista.com/statistics/796680/leading-medical-professional-liability-insurers-usa-by-market-share/ (last visited February 19, 2025)
Leading medical professional liability insurance companies in North America from 2020 to 2022, by market share [Graph], NAIC, March 27, 2023. [Online]. Available: https://www.statista.com/statistics/796680/leading-medical-professional-liability-insurers-usa-by-market-share/
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