The go-between is RAMQ, the same as the ODB in Ontario.
In Ontario, pharmacists do not negotiate an agreement because they do not have a union. They fall under corporations and corporations are not allowed to negotiate with anyone because that would contravene the Competition Act. So the Ontario government sets up its own program and submits it to the ODB to manage.
The same thing goes for Quebec. They negotiate with the government, with the department of health and social services, and the department lets the Régie de l'assurance maladie du Québec manage the program.
We can draw a parallel. In this case, the Régie de l'assurance maladie du Québec would be Medavie Blue Cross. However, the agreement has to be with CIC because CIC is responsible for the program.