I've seen this floating around a couple of times and it's really not accurate. Some information is outdated and some is, for whatever reason, intentionally inflated. The correct information is:
Tobacco use: 443,000 (1)
Medical Errors: 98,000 (2)
Alcohol Abuse: 15,183 (3)
Motor Vehicle Accidents: 35,498 (4)
Unintentional Poisoning: 33,041 (4)
Drug Abuse: 27,000* (5)
Unintentional Falls: 26,009 (4)
Non-firearm Homicides: 5,181 (4)
Firearm Homicides: 11,078* (4)
4 CDC WISQARS fatal injury reports (2010)
* This includes all homicides, including justified homicides by private civilians as well as off duty police. This also includes homicides with BB guns, air operated guns and spring operated guns.