A provision in any medical contract between a patient and medical institution, under which the parties agree to settle by arbitration a controversy thereafter arising out of the contract, or out of the refusal to perform the whole or any part thereof, or a provision to submit to arbitration any controversy existing between them at the time of the agreement to submit, shall be valid, irrevocable, and enforceable, save upon such grounds as exist at law or in equity for the revocation of any contract, and except as herein provided.
La. R.S. § 9:4232