Relating to recovery of damages in civil actions.

HB 4806 modifies Texas law governing medical billing disputes in civil cases. It establishes that medical providers can submit an affidavit stating their charges were reasonable and services necessary, which courts must accept as evidence unless the defendant serves written notice contesting it within strict deadlines (120 days after filing an answer or by expert witness deadlines). If a defendant contests the affidavit, the original affidavit loses evidentiary value except to verify medical records. The bill also clarifies that such affidavits cannot prove causation in the underlying lawsuit. This affects medical providers seeking payment and defendants disputing medical bills in civil trials.