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Directory · Idaho · Medical malpractice

Who writes medical malpractice in Idaho

Top insurer groups from the NAIC market share report; the state's list carries no lines of authority.

Medical Insurance Exch of Ca Group wrote the most medical malpractice in Idaho in 2025, $8.6M and 17.4% of the state's premium; the top five groups hold 55%. Idaho's company list doesn't say which lines each company is licensed for, so the ranking below is the NAIC's top 10 groups; every licensed company is on the Idaho page.

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

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

The insurer groups that write the most medical malpractice in Idaho

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 groupPremium writtenShareLoss ratioMember companies here
1Medical Insurance Exch of Ca Group$8.6M17.43%49%Medical Insurance Exchange Of California, MIEC Mutual Risk Retention Group
2Berkshire Hathaway Group$5.5M11.26%64%GEICO General Insurance Company, GEICO Texas County Mutual Insurance Company, GEICO County Mutual Insurance Company, Government Employees Insurance Company
3Cna Insurance Group$4.5M9.15%36%Continental Casualty Company, Continental Insurance Company, (The), American Casualty Company of Reading, Pennsylvania, National Fire Insurance Company of Hartford
4Physicians Insurance A Mutual Group$4.3M8.85%139%Physicians Insurance A Mutual Company (C), Physicians Insurance Risk Retention Group, Inc.
5Doctors Co. Group$3.9M7.87%50%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
6Mountain States Hlthcare Recip Rrg$3.3M6.63%234%—
7Proassurance Corporation Group$2.4M4.79%46%NORCAL Insurance Company, ProAssurance Indemnity Company, Inc., ProAssurance Insurance Company of America, Allied Eastern Indemnity Company
8Mag Mutual Insurance Group$2.2M4.55%109%MAG Mutual Insurance Company, Professional Security Insurance Company, MD Advantage Insurance Company of New Jersey
9Liberty Mutual Group$2.2M4.51%128%Safeco Insurance Company of America, Liberty Insurance Underwriters, Inc., Liberty Mutual Fire Insurance Company, Liberty County Mutual Insurance Company
10Yellowstone Insurance Exch Rrg$1.4M2.81%12%—
Turned down?

Last resort for medical malpractice in Idaho

Last resortLinesWhereHow to get in
Surplus lines and Lloyd's open marketallall states, under each state's diligent-search rulesThrough surplus lines wholesalers; commercial property and liability have no guaranteed plan, so this is their last stepSource

Method and source

Source: the Idaho insurance regulator company list, read 2026-10-18 and the surplus lines list. Admitted = every company licensed in Idaho per the DOI 2024 Annual Report roster (pp. 42-76), all four sections kept with 'type' = Health / Life & Annuity / Property & Casualty / Title so the merge can filter; 'since' = IDAHO LICENSE DATE; 'lines' = LINE(S) OF BUSINESS split on ';' (duplicates removed). Counts by type: {'Health': 23, 'Life & Annuity': 419, 'Property & Casualty': 870, 'Title': 18}. Domicile 'Canada' mapped to CN; one row (80659) has no domicile printed. Companies withdrawn in 2024 (report p.35) are not in the roster. Surplus = SLA of Idaho eligible list: no domicile or eligibility date on the page; alien insurers carry an AA- import code in 'import_code' and naic '' (two AA- rows are labelled Foreign on the page but flagged alien here); DECLO ASSURANCE CORPORATION shows code 'ID 4862' (not a NAIC code). "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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