I thought that the records had been subpoened? That was part of your post that I was replying to? If they haven't been subpoened then I would just not sign permission for the ICL to access them. Or if you are happy for the ICL to access them but not the other party, then I would make sure that your written permission states that only the ICL is permitted to see them.
If there is a subpoena and you have received it, then it will have a section called Notice of Objection for you to fill in. It gets filed at the Court Registry.
The following is also on the general subpoena form.
"Objection by person to inspection of medical records
14. If the documents to be produced under this subpoena include a person’s medical records, that
person may, before the date stated for production, notify the Registrar in writing that he or she
wants to inspect the records for the purpose of determining whether to object to the inspection or
copying of the document by any other party.
15. If such notice is given:
(a) that person may inspect the medical records and may, within 7 days after the date stated in
the subpoena for production, object to inspection or copying of a document described in this
subpoena by completing filing and serving the attached Notice of Objection – Subpoena, and
(b) unless otherwise ordered, no other person may inspect the medical records until the later of
7 days after the date stated in the subpoena for production or the hearing and determination
of the objection."