LifeCode: A Deployed Application for Automated Medical Coding.
By Daniel T. Heinze, Mark Morsch, Ronald Sheffer, Michelle Jimmink, Mark Jennings, William Morris, and Amy Morsch. AI Magazine 22(2): 76-88 (Summer 2001). This paper is based on the authors' presentation at the Twelfth Innovative Applications of Artificial Intelligence Conference (IAAI-2000). "LifeCode is a natural language processing (NLP) and expert system that extracts demographic and clinical information from free-text clinical records."
13 page paper presented in the A.I. magazine. Good to know a little about Expert Systems first. Some parts technical but explained clearly.
Difficulty 8/10
http://www.aaai.org/ojs/index.php/aimagazine/article/view/1562/1461