About 500 people had been through the unit by early November and it had a positive impact on waiting time targets in the emergency department.
Ms Chittenden said the on-call senior doctor reviewed patients referred by GPs in the unit, which had prevented about 50 per cent of them from being admitted to hospital.
"The Medical Assessment and Planning Unit is a recognised international medical service model in Rotorua Hospital and has demonstrated huge value."
She said they were reviewing the unit's long term sustainability and the chief operating officer and chief executive would review the balance of clinical improvement and financial costs to support the unit going forward.
"The unit was specifically trialled to address the increased winter workload. As such it has had significant benefit to the whole hospital enabling far better management of patients prior to admission. "