This report contains the results of the Association of Research Libraries' survey of academic Health Sciences libraries for 2004-05. Data are presented on collections, expenditures, and personnel and public services. Out of 113 ARL university libraries, 67 responded to the survey. Health Sciences libraries reported median values of 243,011 volumes held and 4,041 gross volumes added. The full-time equivalent of 2,537 staff were employed by these libraries during the year. Responding libraries reported total expenditures of $229,669,155. Library materials made up the largest portion of that total, with 44.95% of aggregated expenses falling under that category. Health sciences libraries reported a total of $40,211,607 on electronic materials, or a median of 42.85% of their total materials budgets. This includes a total of $36,656,698 on electronic serials. Includes appendix: ARL Member Libraries as of June 1, 2006. (Contains 1 figure, 10 tables, and 2 footnotes.)