(a) Insurance is a contract whereby one undertakes to indemnify another or pay a specified amount upon determinable contingencies.
(b) The following contracts are not considered to be insurance for the purposes of this code:
(1) A bond with respect to which no premium is charged or paid;
(2) A bond or contract or undertaking in the performance of which the surety has an interest other than that of surety;
(3) A plan or agreement between an employer and any employee or the employee’s representative, individually or collectively, by the terms of which the employer or the parties to the plan or agreement agree to contribute to the cost of nonoccupational disability benefits, medical attention, treatment or hospitalization for the employee or members of the employee’s family unless such plan is underwritten by an insurer as defined in this article;