
Who writes medical malpractice in Colorado
From the Colorado company list; alphabetical, since Colorado doesn't publish every company's premium by line.
56 insurers are licensed for medical malpractice in Colorado on the regulator's list. Copic Group wrote the most in 2025 (39.7% of the state's premium).
By Sam Alishahi, independent insurance broker · All lines in Colorado
The companies
| Company | NAIC | Home state | Status here | Lines |
|---|---|---|---|---|
| Ace American Insurance Company | 22667 | PA | Admitted (licensed) | Aircraft and aviation, Personal auto, Equipment breakdown +15 more |
| Ace Property and Casualty Insurance Company | 20699 | PA | Admitted (licensed) | Aircraft and aviation, Personal auto, Equipment breakdown +11 more |
| Allied World Assurance Company (U.S.) Inc. | 22730 | NH | Admitted (licensed) | Personal auto, Commercial auto, Commercial package (BOP, CMP) +4 more |
| Allied World Specialty Insurance Company | 16624 | DE | Admitted (licensed) | Personal auto, Equipment breakdown, Commercial auto +11 more |
| American Alternative Insurance Corporation | 19720 | DE | Admitted (licensed) | Aircraft and aviation, Personal auto, Commercial auto +12 more |
| American Association of Orthodontists Insurance Company (a RRG) | 10232 | AZ | Admitted (licensed) | General liability, Medical malpractice, Professional liability (E&O) |
| American Casualty Company of Reading, Pennsylvania | 20427 | PA | Admitted (licensed) | Personal auto, Equipment breakdown, Commercial auto +12 more |
| American Home Assurance Company | 19380 | NY | Admitted (licensed) | Personal auto, Equipment breakdown, Commercial auto +9 more |
| Aspen American Insurance Company | 43460 | TX | Admitted (licensed) | Equipment breakdown, Commercial package (BOP, CMP), Earthquake +9 more |
| Atlantic Specialty Insurance Company | 27154 | NY | Admitted (licensed) | Personal auto, Equipment breakdown, Commercial auto +13 more |
| Beazley Insurance Company, Inc. | 37540 | CT | Admitted (licensed) | Fidelity bonds, Inland marine, General liability +3 more |
| Berkley Assurance Company | 32603 | DE | Admitted (licensed) | Personal auto, Crime (burglary and theft), Fidelity bonds +8 more |
| Berkshire Hathaway Specialty Insurance Company | 22276 | NE | Admitted (licensed) | Personal auto, Equipment breakdown, Commercial auto +11 more |
| CAMPMED CASUALTY \u0026 INDEMNITY COMPANY, INC. | 12260 | NH | Admitted (licensed) | General liability, Medical malpractice, Professional liability (E&O) |
| Capitol Indemnity Corporation | 10472 | WI | Admitted (licensed) | Personal auto, Commercial auto, Commercial package (BOP, CMP) +5 more |
| Church Mutual Insurance Company, S. I. | 18767 | WI | Admitted (licensed) | Personal auto, Commercial auto, Commercial package (BOP, CMP) +6 more |
| Cincinnati Casualty Company (The) | 28665 | OH | Admitted (licensed) | Personal auto, Equipment breakdown, Commercial auto +11 more |
| Cincinnati Indemnity Company (The) | 23280 | OH | Admitted (licensed) | Personal auto, Equipment breakdown, Commercial auto +9 more |
| Cincinnati Insurance Company (The) | 10677 | OH | Admitted (licensed) | Personal auto, Equipment breakdown, Commercial auto +13 more |
| Continental Casualty Company | 20443 | IL | Admitted (licensed) | Personal auto, Equipment breakdown, Commercial auto +14 more |
| Continental Insurance Company, (The) | 35289 | PA | Admitted (licensed) | Personal auto, Equipment breakdown, Commercial auto +12 more |
| COPIC Insurance Company | 11860 | CO | Admitted (licensed) | General liability, Medical malpractice, Professional liability (E&O) |
| Doctors' Company (The), An Interinsurance Exchange, The Doctor's Management | 34495 | CA | Admitted (licensed) | General liability, Medical malpractice, Professional liability (E&O) |
| Fair American Insurance and Reinsurance Company | 35157 | NY | Admitted (licensed) | General liability, Medical malpractice, Professional liability (E&O) +1 more |
| Fortress Assurance Corporation | 10801 | IL | Admitted (licensed) | General liability, Medical malpractice, Professional liability (E&O) |
| Great Divide Insurance Company | 25224 | ND | Admitted (licensed) | Personal auto, Commercial auto, Commercial package (BOP, CMP) +6 more |
| Great Midwest Insurance Company | 18694 | TX | Admitted (licensed) | Personal auto, Commercial auto, Commercial package (BOP, CMP) +8 more |
| Greystone Insurance Company | 10019 | CT | Admitted (licensed) | Personal auto, Equipment breakdown, Commercial auto +6 more |
| Hartford Fire Insurance Company | 19682 | CT | Admitted (licensed) | Personal auto, Equipment breakdown, Commercial auto +13 more |
| Health Care Indemnity Incorporated | 35904 | CO | Admitted (licensed) | General liability, Medical malpractice, Professional liability (E&O) |
| Hudson Insurance Company | 25054 | DE | Admitted (licensed) | Personal auto, Equipment breakdown, Commercial auto +10 more |
| Liberty Insurance Underwriters, Inc. | 19917 | IL | Admitted (licensed) | Personal auto, Commercial auto, Fidelity bonds +4 more |
| MAG Mutual Insurance Company | 42617 | GA | Admitted (licensed) | Commercial package (BOP, CMP), General liability, Medical malpractice +2 more |
| Medical Protective Company (The) | 11843 | IN | Admitted (licensed) | General liability, Medical malpractice, Professional liability (E&O) |
| MMIC Insurance, Inc. | 16942 | MN | Admitted (licensed) | General liability, Medical malpractice, Professional liability (E&O) |
| Mutual Insurance Company Of Arizona | 32832 | AZ | Admitted (licensed) | General liability, Medical malpractice, Professional liability (E&O) |
| National Casualty Company | 11991 | OH | Admitted (licensed) | Personal auto, Equipment breakdown, Commercial auto +13 more |
| National Union Fire Insurance Company of Pittsburgh, Pennsylvania | 19445 | PA | Admitted (licensed) | Aircraft and aviation, Personal auto, Equipment breakdown +16 more |
| Nationwide Mutual Insurance Company | 23787 | OH | Admitted (licensed) | Personal auto, Equipment breakdown, Commercial auto +14 more |
| NCMIC Insurance Company | 15865 | IA | Admitted (licensed) | General liability, Medical malpractice, Professional liability (E&O) |
| NORCAL Insurance Company | 33200 | CA | Admitted (licensed) | General liability, Medical malpractice, Professional liability (E&O) |
| Pharmacists Mutual Insurance Company | 13714 | IA | Admitted (licensed) | Personal auto, Equipment breakdown, Commercial auto +8 more |
| Philadelphia Indemnity Insurance Company | 18058 | PA | Admitted (licensed) | Personal auto, Commercial auto, Commercial package (BOP, CMP) +11 more |
| Preferred Professional Insurance Company | 36234 | NE | Admitted (licensed) | Personal auto, Commercial auto, Crime (burglary and theft) +3 more |
| ProAssurance Indemnity Company, Inc. | 33391 | AL | Admitted (licensed) | General liability, Medical malpractice, Professional liability (E&O) |
| ProAssurance Insurance Company of America | 14460 | IL | Admitted (licensed) | General liability, Medical malpractice, Professional liability (E&O) |
| Professional Solutions Insurance Company | 11127 | IA | Admitted (licensed) | General liability, Medical malpractice, Professional liability (E&O) |
| ProSelect Insurance Company | 10638 | NE | Admitted (licensed) | General liability, Medical malpractice, Professional liability (E&O) |
| QBE Insurance (Europe) Limited | 39217 | PA | Admitted (licensed) | Aircraft and aviation, Personal auto, Equipment breakdown +18 more |
| St. Paul Fire and Marine Insurance Company | 24767 | CT | Admitted (licensed) | Aircraft and aviation, Personal auto, Commercial auto +12 more |
| St. Paul Mercury Insurance Company | 24791 | CT | Admitted (licensed) | Personal auto, Commercial auto, Commercial package (BOP, CMP) +10 more |
| State Farm Fire and Casualty Company | 25143 | IL | Admitted (licensed) | Personal auto, Commercial auto, Commercial package (BOP, CMP) +10 more |
| TDC National Assurance Company | 41050 | OR | Admitted (licensed) | General liability, Medical malpractice, Professional liability (E&O) |
| Travelers Indemnity Company (The) | 25658 | CT | Admitted (licensed) | Aircraft and aviation, Personal auto, Equipment breakdown +14 more |
| Truck Insurance Exchange | 21709 | CA | Admitted (licensed) | Personal auto, Equipment breakdown, Commercial auto +9 more |
| Zurich American Insurance Company | 16535 | NY | Admitted (licensed) | Personal auto, Equipment breakdown, Commercial auto +14 more |
Method and source
Source: the Colorado insurance regulator company list, read 2026-10-18 and the surplus lines list. ADMITTED = Colorado 2025 Insurance Industry Statistical Report (CY2024 data), sheet 'NAIC Companies' (every NAIC-coded company filing with the CO Division of Insurance, 1839 companies) joined to 'NAIC Companies Data' (type) and the 63 line-of-business sheets (lines written in CO + Lic flag). Lic flag per line sheet, consistent per company across sheets (0 conflicts): Y = licensed/admitted, S = surplus lines, N = not licensed, N/A = not applicable. Cross-check: 125/127 Lic=S companies are on the DOI eligible-nonadmitted PDF and 0 Lic=Y companies are. 'admitted' holds Lic=Y (1169) plus 281 companies that file with the CO DOI but wrote no CO premium in CY2024 (no Lic flag; lic='') and are not on the surplus PDF. 'not_admitted' (extra key, 456 rows, same row shape) holds Lic=S/N/N/A companies and no-premium companies that are on the surplus PDF. Row extras: lic (flag as given), group (NAIC group number stripped from the name). 'type' as given: Company Filing Statement Type / Business Type / Business Sub Type Statement Type: P = Property L = Life X = Health Business Type: F = Fraternal G = Other L = Life P = Property R = Risk T = Title X = Health Business Sub Type: HI = Hospital,Medical,Dental or Indemnity HM = Health Maintainance Org LH = Limited Health Service Org N = None PD = Prepaid Dental. Life/health/title companies are included (filter on type: first letter P = property/casualty statement, L = life, X = health; 'P/R/N' = risk retention group, 'T/T/N' = title). 'lines' = CO line-of-business sheets the company reported premium on in CY2024 (not lines of authority; a licensed company with no CO premium has lines=[]). 'since' is not in the source (left ''). Names are NAIC-style abbreviations. 74 companies appear in line sheets but not in the master list (mostly N/N/A). SURPLUS_LINES = DOI 'Colorado Eligible Nonadmitted Insurers Writing Surplus Lines' PDF, effective July 1, 2026, updated 9/16/26; 261 rows (227 NAIC-coded + 34 alien with AA- codes; naic='' and aa_code set for aliens). Colorado has no stamping office. PDF has no domicile column: domicile filled from the statistical report master list where the NAIC code matches (213 of 227). eligible = list effective date, not the insurer's first-eligible date. Prior-year reports: https://doi.colorado.gov/colorado-insurance-industry-statistical-report. "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.
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