Here is an example. Searching Google News for data mining on August 9, 2004 gives us
IBM, Mayo Clinic Take Next Data Mining StepThis story describes how Mayo clinic uses IBM tools to analyze the data on its patients in order to develop indivudualized care.
DB2-based system contains records on 4.4M patients
... a doctor treating a patient for cancer could use data mining to find the results treatments given to the similar patients and use this information to find the best treatment course for new patient.