Hi RW9 , Yes , you are right , but in the latest data i don't have all the NPIs present. Latest data have only 2000 NPIs which are correct i need to repair the 12k NPI(Unique NPIs) in old data. HI Ksharp, Thanks for your input. SImple merge and sort would not help in this problem. I am taking latest data as a reference only for 2k good records after this i have remaining 12k unique NPI which needs to get repaired. Challege is , a single person is working as individual and in a hospital as group , all have there own style of updating the data. thats cause huge problem. One thing i would like to ask is ; do we have any alorithem in SAS EG or any specific process inbuilt in EG , so that i can handle this problem. Things i am trying is : Sound like - in data we can have same named people with same city and Zip and also they eventully works in same hospital. so, for this i need to try something else like to get a flag generated for this , so that i can figure out real one. Thanks!
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