Frequencies for mdcdesc variable in drg2mdcxw2007 dataset :

        Major Diagnostic Category (MDC) |
                            Description |      Freq.     Percent        Cum.
----------------------------------------+-----------------------------------
0: PRINCIPAL DX CAN NOT BE ASSIGNED T.. |         24        3.22        3.22
10: ENDOCRINE, NUTRITIONAL & METABOLI.. |         26        3.49        6.71
11: DISEASES & DISORDERS OF THE KIDNE.. |         43        5.77       12.48
12: DISEASES & DISORDERS OF THE MALE .. |         21        2.82       15.30
13: DISEASES & DISORDERS OF THE FEMAL.. |         25        3.36       18.66
14: PREGNANCY, CHILDBIRTH & THE PUERP.. |         15        2.01       20.67
15: NEWBORNS & OTHER NEONATES WITH CO.. |          7        0.94       21.61
16: DISEASES & DISORDERS OF BLOOD, BL.. |         15        2.01       23.62
17: MYELOPROLIFERATIVE DISEASES & DIS.. |         27        3.62       27.25
18: INFECTIOUS & PARASITIC DISEASES, .. |         17        2.28       29.53
        19: MENTAL DISEASES & DISORDERS |          9        1.21       30.74
1: DISEASES & DISORDERS OF THE NERVOU.. |         75       10.07       40.81
20: ALCOHOL/DRUG USE & ALCOHOL/DRUG I.. |          4        0.54       41.34
21: INJURIES, POISONINGS & TOXIC EFFE.. |         20        2.68       44.03
                              22: BURNS |          6        0.81       44.83
23: FACTORS INFLUENCING HLTH STAT & O.. |         10        1.34       46.17
        24: MULTIPLE SIGNIFICANT TRAUMA |          8        1.07       47.25
25: HUMAN IMMUNODEFICIENCY VIRUS INFE.. |          6        0.81       48.05
     2: DISEASES & DISORDERS OF THE EYE |         10        1.34       49.40
3: DISEASES & DISORDERS OF THE EAR, N.. |         25        3.36       52.75
4: DISEASES & DISORDERS OF THE RESPIR.. |         40        5.37       58.12
5: DISEASES & DISORDERS OF THE CIRCUL.. |         87       11.68       69.80
6: DISEASES & DISORDERS OF THE DIGEST.. |         61        8.19       77.99
7: DISEASES & DISORDERS OF THE HEPATO.. |         36        4.83       82.82
8: DISEASES & DISORDERS OF THE MUSCUL.. |         99       13.29       96.11
9: DISEASES & DISORDERS OF THE SKIN, .. |         29        3.89      100.00
----------------------------------------+-----------------------------------
                                  Total |        745      100.00

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