Texas Civil Practice and Remedies Code - CIV PRAC & REM § 74.403. Qualifications of Expert Witness on Causation in Health Care Liability Claim

(a) Except as provided by Subsections (b), (c), and (c-1), in a suit involving a health care liability claim against a physician or health care provider, a person may qualify as an expert witness on the issue of the causal relationship between the alleged departure from accepted standards of care and the injury, harm, or damages claimed only if the person is a physician and is otherwise qualified to render opinions on that causal relationship under the Texas Rules of Evidence.

(b) In a suit involving a health care liability claim against a dentist, a person may qualify as an expert witness on the issue of the causal relationship between the alleged departure from accepted standards of care and the injury, harm, or damages claimed if the person is a dentist or physician and is otherwise qualified to render opinions on that causal relationship under the Texas Rules of Evidence.

(c) In a suit involving a health care liability claim against a podiatrist, a person may qualify as an expert witness on the issue of the causal relationship between the alleged departure from accepted standards of care and the injury, harm, or damages claimed if the person is a podiatrist or physician and is otherwise qualified to render opinions on that causal relationship under the Texas Rules of Evidence.

(c-1) In a suit involving a health care liability claim against a chiropractor, a person may qualify as an expert witness on the issue of the causal relationship between the alleged departure from accepted standards of care and the injury, harm, or damages claimed if the person is a chiropractor or physician and is otherwise qualified to render opinions on that causal relationship under the Texas Rules of Evidence.

(d) A pretrial objection to the qualifications of a witness under this section must be made not later than the later of the 21st day after the date the objecting party receives a copy of the witness's curriculum vitae or the 21st day after the date of the witness's deposition. If circumstances arise after the date on which the objection must be made that could not have been reasonably anticipated by a party before that date and that the party believes in good faith provide a basis for an objection to a witness's qualifications, and if an objection was not made previously, this subsection does not prevent the party from making an objection as soon as practicable under the circumstances. The court shall conduct a hearing to determine whether the witness is qualified as soon as practicable after the filing of an objection and, if possible, before trial. If the objecting party is unable to object in time for the hearing to be conducted before the trial, the hearing shall be conducted outside the presence of the jury. This subsection does not prevent a party from examining or cross-examining a witness at trial about the witness's qualifications.