Peterborough City Hospital is told it must improve
Peterborough and Stamford Hospitals NHS Trust has been told it must improve services at Peterborough City Hospital.
The Care Quality Commission (CQC) found the hospital, which opened in November, was not meeting standards in several key areas.
Inspectors found inadequate parking, confusion over booking-in arrangements and "unacceptable" waits for emergency treatments.
The trust said a number of concerns had already been addressed.
It has been given 14 days to respond to the CQC report.
Amanda Sherlock, CQC's director of operations, said: "We have told the provider where they need to improve and our inspectors will follow up to ensure those improvements are made.
"If we find that the service does not make progress, then we will consider further action."
A trust spokesman said: "The CQC paid a spot check visit to the hospital in December 2010, particularly looking at the emergency department.
"The inspection took place a few weeks after we had moved into our new hospital and a number of the concerns have already been addressed."