i did not know that different organizations implement  ICD-10-CM slightly different.  we have the ICD-10-CM in our dataset as Character  here is how it looks: Obs DIAG1 1 I130 2 J189 3 S42201A 4 A047 5 J440 6 K5720 7 J189 8 O701 9 Z3800 10 Z3800 ... View more

yes, yo are right. the 99:99 is time unknown. after i format the time it changed to 100 i read the csv file into sas now. time is numerical.  i ran the codes below:  data test2; set z5; format TIME_OF_INJURY hhmm5.; run;  got  : time 100 11:05 100 4:00 100 100 100 16:00 ... how to change the time from hh:mm to hhmm ?    thanks for the help!     ... View more

@xinyao2019 wrote: thank you so much!!! also, i just read the csv file into sas using SAS enterprise guide. no issues at all, and changed the time format it at the same time.      The EG tool for importing will analyze the file itself and then generate a new text file and program to send to SAS to run.  It must do a better job on your file than PROC IMPORT does. ... View more