ANZ will sell its New Zealand OnePath Life medical insurance book to nib NZ Limited, the bank announced yesterday.According to a statement from ANZ, OnePath Life has approximately 20,000 medical insurance policies covering 44,000 people. There will be no change to existing policies and nib will honour all current terms and conditions.John Body, managing director of ANZ Wealth New Zealand, said: "Medical insurance is a specialist business and this sale will enable us to focus on our core life insurance business with minimal impact on existing policy holders."The transaction is not material to ANZ and is subject to regulatory approval, the bank said. ANZ did not elaborate on any other terms or state how much nib will pay for the business.