This session will present three utilized underwriting models that can be used for mid-size employer group medical renewals. Key assumptions will be discussed including a significant focus on the stop loss risk since that is the major insured risk. Sources of data for rating models will be discussed as well. Other topics include the amount of weight or credibility given to large claims, the number of claims experience periods to be used or often used, the impact of catastrophic (over $1,000,000) large claims, key considerations as part of the underwriting process and their importance but not new business underwriting which may have many more unknowns. Attendees will learn what considerations are needed to review the renewal process used at their insurer or for customers, how their renewal is determined. Customers include employers, brokers, consultants and reinsurers. Insurers include commercial insurers, self-funded groups with stop loss insurance on ASO or TPA administered groups and actuaries performing Cobra certifications.