25 major diagnostic categories are there in the ms-drg system.
how many major diagnostic categories are there in the ms-drg system?
25
major diagnostic category









































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.
major diagnostic category
an influential 1974 paper by robert spitzer and joseph l. fleiss demonstrated the second edition of the dsm (dsm-ii) was an unreliable diagnostic tool. they found different practitioners using the dsm-ii rarely agreed when diagnosing patients with similar problems. in reviewing previous studies of eighteen major diagnostic categories, fleiss and spitzer concluded "there are no diagnostic categories for which reliability is uniformly high. reliability appears to be only satisfactory for three categories: mental deficiency, organic brain syndrome (but not its subtypes), and alcoholism. the level of reliability is no better than fair for psychosis and schizophrenia and is poor for the remaining categories".
diagnostic and statistical manual of mental disorders