Chloe Rideout, 20, died following treatment at Derriford Hospital in Plymouth, Devon, in October 2018.
An inquest in Truro, Cornwall, concluded that the young woman passed away 'as a result of a known complication, sepsis, after a necessary surgical procedure, an appendectomy, which neglect contributed to.'
Senior Cornwall coroner Andrew Cox said her family had 'significant concerns following her admission to Derriford Hospital' on October 7.
Among the shortcomings highlighted by Mr Cox, he said that although her bloods were ordered, they were not checked or acted upon before Ms Rideout was discharged.
Had they been, he said medics would have been aware her inflammation was not under control as she was deteriorating clinically.