S.C. Code Ann. § 38-71-241: Percentage copayment and deductible must be applied to negotiated rate or lesser charge of that provider.

An insurer that negotiates rates with providers for covered health care services under an individual or group accident and health insurance policy must provide that percentage copayments and deductibles paid by the insured are applied to the negotiated rates or lesser charge of that provider. Nothing in this section precludes an insurer from issuing a policy which contains fixed dollar copayments and deductibles.