birth_name article_title name alma_mater
thomas m. ryan thomas ryan -lrb- businessman -rrb-
 thomas ryan university of rhode island
thomas ryan -lrb- businessman -rrb-

`` this article refers to the united states businessperson .
for other persons named thomas ryan , see the disambiguation page . . ''
thomas m. ryan is an american businessperson .
he served as the president and chief executive officer of cvs/caremark corporation from 1998 to 2011 .
