Hello Al Rack,
I invite you to check the address of your caisse primaire d'assurance maladie (CPAM) on the website ameli.fr page "Adresses et contacts".
You can also get an appointment to provide your file to an agent in a CPAM office, calling the help line.
To know how to be covered by the French healthcare system, I advise you to read this answer, available on the forum: "New to France - Healthcare?".
If you are a talent visa holder with a french work contract, you have to send your application form to Paris :
Assurance maladie de Paris
SRI /talents
75948 Paris Cedex 19
Have a good day.
