(a) Whenever an issue of hospital, medical, dental, pharmaceutical, or funeral charges arises in any civil proceeding, the injured party or his guardian, administrator, or executor is competent to give evidence regarding the amount paid or required to be paid in full satisfaction of such charges, provided that records or copies of such charges showing the amount paid or required to be paid in full satisfaction of such charges accompany such testimony.
(b) The testimony of a person pursuant to subsection (a) of this section establishes a rebuttable presumption of the reasonableness of the amount paid or required to be paid in full satisfaction of the charges. However, in the event that the provider of hospital, medical, dental, pharmaceutical, or funeral services gives sworn testimony that the charge for that provider's service either was satisfied by payment of an amount less than the amount charged, or can be satisfied by payment of an amount less than the amount charged, then with respect to that provider's charge only, the presumption of the reasonableness of the amount charged is rebutted and a rebuttable presumption is established that the lesser satisfaction amount is the reasonable amount of the charges for the testifying provider's services. For the purposes of this subsection, the word "provider" shall include the agent or employee of a provider of hospital, medical, dental, pharmaceutical, or funeral services, or a person with responsibility to pay a provider of hospital, medical, dental, pharmaceutical, or funeral services on behalf of an injured party.
(c) The fact that a provider charged for services provided to the injured person establishes a permissive presumption that the services provided were reasonably necessary but no presumption is established that the services provided were necessary because of injuries caused by the acts or omissions of an alleged tortfeasor.