<P> The Major Diagnostic Categories ( MDC ) are formed by dividing all possible principal diagnoses ( from ICD - 9 - CM ) into 25 mutually exclusive diagnosis areas . MDC codes , like diagnosis - related group ( DRG ) codes , are primarily a claims and administrative data element unique to the United States medical care reimbursement system . DRG codes also are mapped , or grouped , into MDC codes . </P>
<P> The Major Diagnostic Categories ( MDC ) are formed by dividing all possible principal diagnoses ( from ICD - 9 - CM ) into 25 mutually exclusive diagnosis areas . MDC codes , like diagnosis - related group ( DRG ) codes , are primarily a claims and administrative data element unique to the United States medical care reimbursement system . DRG codes also are mapped , or grouped , into MDC codes . </P>
how many major diagnostic categories are there in the ms-drg system
how many major diagnostic categories are there in the ms-drg system
25
25