Spectrum Underwriting Managers, Inc. Spectrum is a full-service managing general underwriter of specific, aggregate and integrated medical stop loss insurance and a leading provider of comprehensive stop loss insurance products and services for small employers with 25 to 199 employee lives. Spectrum's products are available through a nationwide network of select Third Party Administrators. Spectrum represents Zurich American Insurance Company, rated “A” by A.M. Best. Spectrum is an active member of the Self-Insurance Institute of America, Inc. (SIIA) and is a "Stop Loss Partner" in the Society of Professional Benefit Administrators (SPBA). Spectrum is your one-stop small group stop loss resource.  It's here! Spectrum is pleased to announce that Integrated Stop Loss Insurance (ISL) is now available through select Third Party Administrators. ISL is the ultimate bridge product for small employers seeking a simple way to move from a fully-insured group health plan to a true self-funded medical benefits plan. Like traditional stop loss insurance, ISL is a catastrophic cover for a self-funded medical benefits plan. The employer will enjoy all the benefits of traditional self-funding while enjoying the ease, look and feel of a fully-insured group health plan. Contact Spectrum for more details.