Tracking for patients

MarinaSaadalla Thanks! I assume that the Card numbers represent the patients. I created a pivot table that counts the number of visits per card number, per assessment, per day. Showing only those that had more than 1 visit in total. That limits the list to 10 patients, one of which had 3 visits within two days. Up to you to judge the weirdness. 

Now, in your real file with 68000 records, you could start in the same way, but vary the filtering limits to limit the output.