OLDWICK, N.J.--(BUSINESS WIRE)--A.M. Best has affirmed the financial strength rating of B++ (Good) and the issuer credit ratings (ICR) of “bbb” of the core subsidiaries of HealthMarkets, Inc. (HealthMarkets) (headquartered in North Richland Hills, TX), which includes The Chesapeake Life Insurance Company (Chesapeake) (Oklahoma City, OK) and Mid-West National Life Insurance Company of Tennessee (Mid-West) (North Richland Hills, TX). Additionally, A.M. Best has affirmed the ICR of “bb” of HealthM