(b) A health plan company or other insurer must not consider, in determining a provider's usual and customary payment, standard payment, or allowable payment used as a basis for determining the provider's payment by the health plan company or other insurer, the following discounted payment situations:

1. (1) care provided to relatives of the provider;
2. (2) care for which a discount is given for hardship situations; and
3. (3) care for which a discount is given in exchange for cash payment.