La. R.S. 9:394

In an action to establish paternity, originals or certified copies of bills for pregnancy, childbirth, and genetic testing shall be admissible as an exception to the hearsay rule and shall be prima facie evidence that the amounts reflected on the bills were incurred for such services or testing on behalf of the child. Extrinsic evidence of authenticity of the bills, or their duplicates, as a condition precedent to admissibility shall not be required.