Frequencies for mdcdesc variable in drg2mdcxw2006 dataset :

        Major Diagnostic Category (MDC) |
                            Description |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
0: PRINCIPAL DX CAN NOT BE ASSIGNED T.. |         14        2.60        2.60
10: ENDOCRINE, NUTRITIONAL & METABOLI.. |         17        3.16        5.76
11: DISEASES & DISORDERS OF THE KIDNE.. |         33        6.13       11.90
12: DISEASES & DISORDERS OF THE MALE .. |         19        3.53       15.43
13: DISEASES & DISORDERS OF THE FEMAL.. |         17        3.16       18.59
14: PREGNANCY, CHILDBIRTH & THE PUERP.. |         15        2.79       21.38
15: NEWBORNS & OTHER NEONATES WITH CO.. |          7        1.30       22.68
16: DISEASES & DISORDERS OF BLOOD, BL.. |          9        1.67       24.35
17: MYELOPROLIFERATIVE DISEASES & DIS.. |         18        3.35       27.70
18: INFECTIOUS & PARASITIC DISEASES, .. |         11        2.04       29.74
        19: MENTAL DISEASES & DISORDERS |          9        1.67       31.41
1: DISEASES & DISORDERS OF THE NERVOU.. |         46        8.55       39.96
20: ALCOHOL/DRUG USE & ALCOHOL/DRUG I.. |          4        0.74       40.71
21: INJURIES, POISONINGS & TOXIC EFFE.. |         17        3.16       43.87
                              22: BURNS |          8        1.49       45.35
23: FACTORS INFLUENCING HLTH STAT & O.. |          7        1.30       46.65
        24: MULTIPLE SIGNIFICANT TRAUMA |          4        0.74       47.40
25: HUMAN IMMUNODEFICIENCY VIRUS INFE.. |          3        0.56       47.96
     2: DISEASES & DISORDERS OF THE EYE |         13        2.42       50.37
3: DISEASES & DISORDERS OF THE EAR, N.. |         31        5.76       56.13
4: DISEASES & DISORDERS OF THE RESPIR.. |         30        5.58       61.71
5: DISEASES & DISORDERS OF THE CIRCUL.. |         55       10.22       71.93
6: DISEASES & DISORDERS OF THE DIGEST.. |         44        8.18       80.11
7: DISEASES & DISORDERS OF THE HEPATO.. |         20        3.72       83.83
8: DISEASES & DISORDERS OF THE MUSCUL.. |         59       10.97       94.80
9: DISEASES & DISORDERS OF THE SKIN, .. |         28        5.20      100.00
----------------------------------------+-----------------------------------
                                  Total |        538      100.00

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