Westside Healthcare has closed its emergency department for residents because of a shortage of doctors, the health agency said on Friday.

The Westside’s chief executive, James Mathers, said that despite a record number of new residents joining the health care system, the number of doctors was a “big concern” for patients.

The announcement came as the city’s medical centre, the Westpac City Hospital, closed for a two-week closure in September due to a lack of beds.

A shortage of specialist doctors was also the biggest concern for Westside staff, he said.

Mather and Chief Executive Officer Paul Lonergan said in a statement that they had to “reassess our staffing and resources”.

Westside said it was still “investigating the circumstances” behind the closure, but said it would be “appropriate” to provide additional staff to staff existing hospitals.

Westpac is WestsideHealth’s primary source of funding.