Air carrier Captain reported an incomplete Hazmat document required a return to gate to correct the issue. The document was corrected by Ramp personnel and flight departed normally.

Narrative

Before push received final dangerous goods summary with time XA:29:49z. Sent code. All things normal with one shipment with three items with items 01;02 and 03. Then received two other final" dangerous goods summaries with times XA:35:14z and XA:56:34z with one shipment three items but only showing item 01 and 02. Tried to clarify with ops; dispatch and DG group. DG group said they could see the issue. Delayed. Someone (not me )suggested to remove box from aircraft to not be delayed any further. Box removed. Then ops told us dangerous good were supposed to be of the flight the day before and there was a mixup. Was informed it was chemotherapy drugs for patient and asked if I would take the dangerous goods. I said yes but the airline needed to make sure paperwork was correct. Package put back on with correct paperwork sent to fight deck. Pushed then taxi to runway XX. Couldn't get final numbers. Contacted dispatch and ops. Ops said they couldn't find employee who loaded DG and was unsure which cargo pit it was in. Was told to return to gate X so they could put "eyes" on the package. Returned to gate. Ramp fixed everything and we pushed again with normal departure. No spillage occurred."