The Walgreen Company (nyseWAG), d/b/a Walgreens (without an apostrophe), is the largest drugstore chain in the United States. The company operates over 7,500 drugstores across all 50 states, the District of Columbia and Puerto Rico. Walgreens provides access to consumer goods and services and pharmacy, health and wellness services in America through its retail drugstores, Walgreens Health Services division and Walgreens Health and Wellness division. Walgreens Health Services offers pharmacy patients and prescription drug and medical plans through Walgreens Health Initiatives Inc. (a pharmacy benefit manager), Walgreens Mail Service Inc., Walgreens Home Care Inc., Walgreens Specialty Pharmacy LLC and SeniorMed LLC (a pharmacy provider to long-term care facilities). Walgreens Health and Wellness division includes Take Care Health Systems. Walgreens has 7,507 drugstores as of April 30, 2010. Walgreens was founded in Chicago, Illinois (Chicago), in 1901 and has since expanded throughout the United States. Its headquarters is located in the nearby suburb of Deerfield, Illinois.