People receiving suspicious telephone calls trying to make medical appointments at their home should call the police, says Hastings Health Centre director Colin Dykes.
A "very astute" practice nurse received two phone calls from separate people on the same day last week, regarding calls from Niagara Healthcare, Dr Dykes said.
"They wanted to make an appointment with them in their home to show them something they said was beneficial for their health.
"The practice nurse contacted our manger and Googled Niagara, finding news items dating back to 2011 saying the company targeted the elderly offering home visits.
"A warning has been given to all general practices in Hawke's Bay regarding this organisation.