A "Major Diagnostic Category" (MDC) is a system for classifying diseases or conditions treated in an inpatient setting. It is one of twenty five mutually exclusive principal diagnosis categories which correspond to a single organ system or etiology and in general are associated with a particular medical specialty. MDC's are part of the larger DRG system. Each individual DRG corresponds to one distinct MDC.

Click on one of the MDCs that most closely reflects the general type of hospitalization you would like to research.”