| Company | Location | Phone |
| Aetna, Inc. | Hartford, CT | 860-273-0123 |
| AFLAC, Inc. | Wilmington, DE | 302-594-2000 |
| AIG Insurance Co. | Wilmington, DE | 302-594-2000 |
| Allmerica Financial | Worcester, MA | 508-855-1000 |
| Allstate Insurance | Northbrook, IL | 847-402-5000 |
| American Family Mutual Insurance Co. | Madison, WI | 608-249-2111 |
| American General Corporation | Houston, TX | 713-831-1111 |
| American Income Life Insurance Co. | Waco, TX | 254-751-8600 |
| American Re Corporation | Princeton, NJ | 609-243-4200 |
| Avmed | Miami, FL | 305-671-5437 |
| Blue Cross & Blue Shield Association | Chicago, IL | 312-297-6000 |
| Blue Cross & Blue Shield of Michigan | Southfield, MI | 248-448-8462 |
| Blue Cross of California | Thousands Oaks, CA | 800-476-7355 |
| CareFlorida/Foundation Health Insurance | Sunrise, FL | 954-858-3000 |
| The Chubb Corporation | Warren, NJ | 908-903-2000 |
| C N A | Chicago, IL | 312-822-5000 |
| Conseco Life Insurance Inc. | Carmel, IN | 317-817-6100 |
| Constitution Healthcare | North Haven, CT | 203-234-2011 |
| Empire Blue Cross/Blue Shield Insurance | New York, NY | 212-476-1000 |
| Equitable Insurance | New York, NY | 212-554-1234 |
| F M Global | Johnston, RI | 401-275-3000 |
| Farmers Group, Inc. | Los Angeles, CA | 323-930-4230 |
| Fireman’s Fund Corporation | Novato, CA | 415-899-2000 |
| Foremost Corporation of America | Grand Rapids, MI | 616-942-3000 |
| Foundation Health Insurance | Woodland Hills, CA | 818-676-6000 |
| Geico Auto Insurance | Washington, DC | 301-986-3000 |
| General Reinsurance Corporation | Stamford, CT | 203-328-5000 |
| Globe Life & Accident Insurance Company | Oklahoma City, OK | 405-270-1400 |
| Grange Mutual Companies | Columbus, OH | 614-445-2900 |
| Great American Insurance Co. | Cincinnati, OH | 513-369-5000 |
| Guardian Life Insurance Co. of America | New York, NY | 212-598-8000 |
| Harvard Pilgrim Health Care | Dedham, MA | 781-251-1000 |
| Health Net Group Health Plans | Oakland, CA | 510-465-9600 |
| Health Insurance Plan of New York | New York, NY | 212-630-5000 |
| Humana, Inc. | Louisville, KY | 502-580-1000 |
| Independent Insurance Agents of America | Alexandria, VA | 703-683-4422 |
| J. C. Penney Co. Insurance Group, Inc. | Dallas, TX | 972-431-1000 |
| Jefferson-Pilot Insurance | Greensboro, NC | 336-691-3000 |
| Kaiser Permanente Health Insurance | Oakland, CA | 510-271-5910 |
| Kemper Insurance Companies | Long Grove, IL | 847-320-2000 |
| Keystone Health Insurance | Philadelphia, PA | 215-864-5000 |
| Liberty Mutual Insurance Co. | Boston, MA | 617-357-9500 |
| Liberty National Life Insurance Co. | Birmingham, AL | 205-325-2722 |
| Lincoln Financial Group | Ft. Wayne, IN | 219-455-2000 |
| Massachusetts Mutual Life Insurance Co. | Springfield, MA | 413-788-8411 |
| Metropolitan Life Insurance Co. | New York, NY | 212-578-2211 |
| MONY Life Insurance Company of America | New York, NY | 212-708-2000 |
| Mutual of America Life Insurance | New York, NY | 212-224-1600 |
| Mutual of Omaha Insurance | Omaha, NE | 402-342-7600 |
| Nationwide Insurance Company | Columbus, OH | 614-249-7111 |
| New York Life Insurance Co. | New York, NY | 212-576-7000 |
| Northwestern Mutual Life Insurance Co. | Milwaukee, WI | 414-271-1444 |
| Oxford Health Plans, Inc. | Darien, CT | 203-851-1836 |
| Pacificare Health Systems | Santa Ana, CA | 714-825-5200 |
| Physicians Mutual Insurance Co. | Omaha, NE | 402-633-1000 |
| Progressive Auto Insurance | Mayfield Village, OH | 440-461-5000 |
| The Prudential Insurance Co. | Newark, NJ | 973-802-6000 |
| Safeco Insurance Co. of America | Seattle, WA | 206-545-5000 |
| Savings Bank Life Insurance Fund | New York, NY | 212-356-0300 |
| Secure Horizons Health Insurance Co. | Cypress, CA | 714-236-5000 |
| St. Paul Property-Liability and Life Insurance | Saint Paul, MN | 651-310-7911 |
| State Farm Insurance Co. | Bloomington, IL | 309-766-2311 |
| The Hartford Financial Services Group | Hartford, CT | 860-547-5000 |
| TIAA-CREF | New York, NY | 212-490-9000 |
| TransAmerica Corp. | San Francisco, CA | 415-983-4000 |
| Travelers Group Insurance | Long Island City, NY | 718-248-3109 |
| U.S. Healthcare, Aetna U.S. Healthcare, Inc. | Blue Bell, PA | 215-775-4800 |
| United American Healthcare Corp. | Detroit, MI | 313-393-0200 |
| United American Insurance | McKinney, TX | 972-529-5085 |
| United Healthcare Insurance | Minneapolis, MN | 952-936-1300 |
| United Investors Life Insurance | Birmingham, AL | 205-325-4300 |
| UNUM Life Insurance | Portland, ME | 207-770-2211 |
| Wausau Insurance | Wausau, WI | 715-842-6976 |
| Zurich-American Insurance Group | Schaumburg, IL | 847-605-6000 |