From Longman Dictionary of Contemporary English heck heck 1 / hek / interjection informal 1 ANNOY EMPHASIZE used to show that you are annoyed or to emphasize what you are saying Oh heck! Iâve lost my keys! âDo you believe him?â âHeck, no.â 2 â did he heck/will it heck etc
The  Principal Diagnosis  (PDX) for inpatient care is defined as that condition established after study to be chiefly responsible for occasioning the admission of the patient to the hospital for care.
Major Diagnostic Categories (MDC) The Major Diagnostic Categories (MDC) are formed by dividing all possible principal diagnoses (from ICD-9) into 25 mutually exclusive diagnosis areas. The diagnoses in each MDC correspond to a single organ system or etiology and in general are associated with a particular medical specialty.