Fitzgerald said until the investigation was complete, the body was constrained on what it could say.
One Auckland woman, who is advertising surgeries on Chinese social media site WeChat, was promoting cosmetic medicines and products which were not registered for use here.
Several sources in the industry said the woman claimed to be a doctor, but did not have any qualification or medical training.
The woman had been operating in the CBD, but is believed to have moved the operation to a private suburban address.
She could not be contacted, and did not respond to messages sent to her on WeChat, where she is promoting her business.
Based on screenshots seen by the Herald, the woman is believed to be using an unregistered product similar to botox and importing dermal fillers.
Her advertised services include nose reshaping, fat transfer and facial threading.
Also on WeChat, another woman was also promoting other unregistered cosmetic products and procedures she may not be qualified to perform.
Sydney woman Jean Huang died after a botched breast procedure by a Chinese visitor claiming to be a doctor in August.
Anaesthetic and breast fillers were administered on Huang by the tourist, who was not qualified to do them.
Fitzgerald said people could complain to the Ministry of Health if they were concerned about medicines or medical devices used in relation to a cosmetic surgery.