Directory · Michigan · Medical malpractice

Who writes medical malpractice in Michigan

Top insurer groups from the NAIC market share report; the state's own licensed-company list isn't available in a form a program can read.

Doctors Co. Group wrote the most medical malpractice in Michigan in 2025, $46.6M and 17.6% of the state's premium; the top five groups hold 56%. Michigan doesn't publish a machine-readable list of every licensed company, so the ranking below is the NAIC's top 10 groups.

By Sam Alishahi, independent insurance broker · All lines in Michigan

Top 10 · NAIC table: 11.1, 11.2 - Medical Professional Liability

The insurer groups that write the most medical malpractice in Michigan

Top 10 insurer groups by direct premium written in 2025, from the NAIC's Market Share Reports for Property/Casualty Groups and Companies by State. A group is the parent and its insurance companies together; share is the group's part of the state total for the line; loss ratio is losses incurred over premium earned.

#	Insurer group	Premium written	Share	Loss ratio	Member companies here
1	Doctors Co. Group	$46.6M	17.57%	38%	Doctors' Company (The), An Interinsurance Exchange, The Doctor's Management, TDC Specialty Insurance Company, TDC National Assurance Company, Doctors Company Risk Retention Group, A Reciprocal Exchange, The
2	Berkshire Hathaway Group	$32.9M	12.41%	68%	GEICO General Insurance Company, GEICO Texas County Mutual Insurance Company, GEICO County Mutual Insurance Company, Government Employees Insurance Company
3	Curi Holdings Group	$26.9M	10.12%	39%	Medical Mutual Insurance Company of North Carolina, MMIC Insurance, Inc., Medical Security Insurance Company, UMIA Insurance, Inc.
4	Cna Insurance Group	$21.7M	8.17%	46%	Continental Casualty Company, Continental Insurance Company, (The), American Casualty Company of Reading, Pennsylvania, National Fire Insurance Company of Hartford
5	Proassurance Corporation Group	$20.9M	7.89%	110%	NORCAL Insurance Company, ProAssurance Indemnity Company, Inc., ProAssurance Insurance Company of America, Allied Eastern Indemnity Company
6	Coverys Group	$19.1M	7.18%	31%	Preferred Professional Insurance Company, ProSelect Insurance Company, Coverys Specialty Insurance Company, Coverys Risk Retention Group, Inc.
7	Ismie Group	$12.0M	4.52%	23%	ISMIE Mutual Insurance Company, ISMIE Indemnity Company
8	Liberty Mutual Group	$10.3M	3.88%	—	Safeco Insurance Company of America, Liberty Insurance Underwriters, Inc., Liberty Mutual Fire Insurance Company, Liberty County Mutual Insurance Company
9	Health Care Industry Liability Reciprocal Insurance Company, A Risk Retention Group	$6.9M	2.59%	54%	—
10	Apollo Global Mgmt Group	$5.3M	1.98%	47%	Aspen American Insurance Company, Aspen Specialty Insurance Company, Alea North America Insurance Company, National American Insurance Company of California

Turned down?

Last resort for medical malpractice in Michigan

Last resort	Lines	Where	How to get in
Surplus lines and Lloyd's open market	all	all states, under each state's diligent-search rules	Through surplus lines wholesalers; commercial property and liability have no guaranteed plan, so this is their last step	Source

Method and source

Top insurer groups from the NAIC market share report; the state's own licensed-company list isn't available in a form a program can read. "Premium" is direct premium written in the state for the year shown; "share" is that company's part of the state total for the line. A company can be licensed for a line and write none of it, and a surplus lines insurer can write a line without a state license for it.

Open to use. Cite "Alishahi Insurance insurance company directory" and link here. CSV · JSON.

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