This document presents data that describe collections, expenditures, personnel, and services in 64 medical libraries at Association of Research Libraries (ARL) member institutions throughout North America. In 2007-2008, the reporting health sciences libraries held a median of 240,955 volumes, spent a total of $240,019,298, and employed 2,304 full-time equivalent staff. Expenditures for library materials and staff made up the largest portion of total expenditures, at 48.61% and 42.06% respectively. Respondents reported spending a total of $81,986,136 for electronic materials, or a median of 76% of their total materials budgets. This includes a total of $76,921,558 for ongoing e-resource purchases. A list of ARL Member Libraries as of June 1, 2009 is provided. [For "ARL Academic Health Sciences Library Statistics, 2006-2007," see ED503843.]