Vasilios "Bill" Kalogredis. Prudent Layperson Standard cost savings benefitting the insurer two videos criticizing Anthem's move. settled with Piedmont Vox. —Andrew Stein, an associate at Lamb McErlane who focuses his practice on health and business law, assisted in the preparation of this article. Vasilios J. Kalogredis is chairman of Lamb McErlane's health law department. He represents many medical and dental groups and thousands of individual physicians and dentists.