Frequencies for mdcdesc variable in drg2mdcxw2011 dataset :

        Major Diagnostic Category (MDC) |
                            Description |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
0: PRINCIPAL DX CAN NOT BE ASSIGNED T.. |         26        3.46        3.46
10: ENDOCRINE, NUTRITIONAL & METABOLI.. |         26        3.46        6.92
11: DISEASES & DISORDERS OF THE KIDNE.. |         43        5.73       12.65
12: DISEASES & DISORDERS OF THE MALE .. |         21        2.80       15.45
13: DISEASES & DISORDERS OF THE FEMAL.. |         25        3.33       18.77
14: PREGNANCY, CHILDBIRTH & THE PUERP.. |         15        2.00       20.77
15: NEWBORNS & OTHER NEONATES WITH CO.. |          7        0.93       21.70
16: DISEASES & DISORDERS OF BLOOD, BL.. |         15        2.00       23.70
17: MYELOPROLIFERATIVE DISEASES & DIS.. |         27        3.60       27.30
18: INFECTIOUS & PARASITIC DISEASES, .. |         17        2.26       29.56
        19: MENTAL DISEASES & DISORDERS |          9        1.20       30.76
1: DISEASES & DISORDERS OF THE NERVOU.. |         75        9.99       40.75
20: ALCOHOL/DRUG USE & ALCOHOL/DRUG I.. |          4        0.53       41.28
21: INJURIES, POISONINGS & TOXIC EFFE.. |         20        2.66       43.94
                              22: BURNS |          6        0.80       44.74
23: FACTORS INFLUENCING HLTH STAT & O.. |         10        1.33       46.07
        24: MULTIPLE SIGNIFICANT TRAUMA |          8        1.07       47.14
25: HUMAN IMMUNODEFICIENCY VIRUS INFE.. |          6        0.80       47.94
     2: DISEASES & DISORDERS OF THE EYE |         10        1.33       49.27
3: DISEASES & DISORDERS OF THE EAR, N.. |         25        3.33       52.60
4: DISEASES & DISORDERS OF THE RESPIR.. |         40        5.33       57.92
5: DISEASES & DISORDERS OF THE CIRCUL.. |         88       11.72       69.64
6: DISEASES & DISORDERS OF THE DIGEST.. |         61        8.12       77.76
7: DISEASES & DISORDERS OF THE HEPATO.. |         36        4.79       82.56
8: DISEASES & DISORDERS OF THE MUSCUL.. |         99       13.18       95.74
9: DISEASES & DISORDERS OF THE SKIN, .. |         32        4.26      100.00
----------------------------------------+-----------------------------------
                                  Total |        751      100.00

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