An ambulance had to wait more than half an hour to hand over a patient at Kettering General Hospital on more than 350 occasions in January.
The latest NHS England figures show that from January 2 to 29 this year ambulances had to wait for more than 30 minutes to transfer a patient to the hospital on 355 occasions.
The worst day was January 28, when 38 ambulances had to wait for more than half an hour. On the same day, 57 ambulances had to wait for more than 30 minutes at Northampton General Hospital.
An East Midlands Ambulance spokesman said: “When we and hospital A&Es are under significant demand it can result in some delays to handover.
“At Emas we believe no delay is acceptable and our staff are working very hard with health care colleagues in emergency departments to improve turnaround times, particularly at times of significant demand.
“Over the past year, Emas has overall seen an improvement in performance and we continue to focus on making further improvements.”
KGH’s chief operating officer, Jon Scott, said: “Kettering General Hospital’s A&E department was designed to see about 100 patients per day – but it currently sees about 200. Clearly more A&E capacity would help.”