C. Seth Lester, ASA, MAAA

Healthcare actuary and technologist with experience in group commercial plan pricing and underwriting, experience analysis, actuarial machine learning applications, business development and product marketing.


This promotional case study was written to promote the use of Milliman Advanced Risk Adjusters (MARA) on administrative claims data to analytically stratify a population based on the risk of incurring high-cost claims (over $50k PMPY) in the subsequent plan year.

This paper is used in sales and marketing initiatives to promote MARA’s prospective models for US commercial plan populations to new prospective clients, particularly stop-loss underwriters in large payer organizations and Medicaid MCOs.

Can Milliman Advanced Risk Adjusters® (MARA) predict high-cost health plan members?