Frequencies for mdcdesc variable in drg2mdcxw2003 dataset :

        Major Diagnostic Category (MDC) |
                            Description |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
0: PRINCIPAL DX CAN NOT BE ASSIGNED T.. |         13        2.51        2.51
10: ENDOCRINE, NUTRITIONAL & METABOLI.. |         17        3.28        5.79
11: DISEASES & DISORDERS OF THE KIDNE.. |         32        6.18       11.97
12: DISEASES & DISORDERS OF THE MALE .. |         19        3.67       15.64
13: DISEASES & DISORDERS OF THE FEMAL.. |         17        3.28       18.92
14: PREGNANCY, CHILDBIRTH & THE PUERP.. |         15        2.90       21.81
15: NEWBORNS & OTHER NEONATES WITH CO.. |          7        1.35       23.17
16: DISEASES & DISORDERS OF BLOOD, BL.. |          8        1.54       24.71
17: MYELOPROLIFERATIVE DISEASES & DIS.. |         18        3.47       28.19
18: INFECTIOUS & PARASITIC DISEASES, .. |          9        1.74       29.92
        19: MENTAL DISEASES & DISORDERS |          9        1.74       31.66
1: DISEASES & DISORDERS OF THE NERVOU.. |         41        7.92       39.58
20: ALCOHOL/DRUG USE & ALCOHOL/DRUG I.. |          4        0.77       40.35
21: INJURIES, POISONINGS & TOXIC EFFE.. |         17        3.28       43.63
                              22: BURNS |          8        1.54       45.17
23: FACTORS INFLUENCING HLTH STAT & O.. |          7        1.35       46.53
        24: MULTIPLE SIGNIFICANT TRAUMA |          4        0.77       47.30
25: HUMAN IMMUNODEFICIENCY VIRUS INFE.. |          3        0.58       47.88
     2: DISEASES & DISORDERS OF THE EYE |         13        2.51       50.39
3: DISEASES & DISORDERS OF THE EAR, N.. |         31        5.98       56.37
4: DISEASES & DISORDERS OF THE RESPIR.. |         29        5.60       61.97
5: DISEASES & DISORDERS OF THE CIRCUL.. |         52       10.04       72.01
6: DISEASES & DISORDERS OF THE DIGEST.. |         40        7.72       79.73
7: DISEASES & DISORDERS OF THE HEPATO.. |         20        3.86       83.59
8: DISEASES & DISORDERS OF THE MUSCUL.. |         57       11.00       94.59
9: DISEASES & DISORDERS OF THE SKIN, .. |         28        5.41      100.00
----------------------------------------+-----------------------------------
                                  Total |        518      100.00

by Jean Roth , jroth@nber.org , 22 Apr 2016