How Texas Medical Billing Affidavits Work in Injury Cases — And Why Treating Doctors Still Matter at Trial
Texas law provides multiple ways to prove medical bills at trial. §18.001 medical billing affidavits are one useful tool, allowing a party to establish that past medical charges were reasonable and necessary without calling the treating provider to testify. However, affidavits are optional, and modern defense practice frequently neutralizes them through counter-affidavits. When that happens, medical bills and treatment records can still be admitted through the Texas Rules of Evidence, including business records, custodians, depositions, and live medical testimony. Affidavits also do not address causation — a subject juries expect to hear from treating physicians, chiropractors, and therapists who explain what happened to the body, why the treatment was needed, and how the injury affects daily life. In cases involving injections, imaging, or surgery, treating providers remain the most compelling and credible source of evidence at trial.
