Advice from Weston A. Price Foundation
You may wish to check your most recent NZ Privacy Act, I haven’t read it. I would ask them under what legislation they are requesting your medical records, say you are a private person and are concerned about how the data is being requested and its use.
https://www.legislation.govt.nz/act/public/2020/0031/latest/LMS23223.html
The Shadows 