ICD-9-CM is the official system of assigning codes to diagnoses and procedures associated with hospital utilization in the United States. The ICD-9 is used to code and classify mortality data from death certificates.
From Stat!Ref, scroll down and select EBMcalc EBMcalc is a unique computerized medical reference and tool set. EBMcalc encompasses a wide array of pertinent medical formulae, clinical criteria sets and decision tree analysis tools used everyday by clinicians, medical educators, nurses and health care students of all types.
The NCEMI has created useful online calculators. Decision rules, scores, and algorithms are also provided. Best viewed in IE, these links are along the right-hand side of the page, under the images section. Page does not display in Firefox.