NJ Rev Stat § 2A:53A-41 (2021)
2021 New Jersey Revised Statutes|Title 2A - Administration of Civil and Criminal Justice|Section 2A:53A-41 - Requirements for person giving expert testimony, executing affidavit.

2A:53A-41 Requirements for person giving expert testimony, executing affidavit.  7. In an action alleging medical malpractice, a person shall not give expert testimony or execute an affidavit pursuant to the provisions of P.L.1995, c.139 (C.2A:53A-26 et seq.) on the appropriate standard of practice or care unless the person is licensed as a physician or other health care professional in the United States and meets the following criteria: a. If the party against whom or on whose behalf the testimony is offered is a specialist or subspecialist recognized by the American Board of Medical Specialties or the American Osteopathic Association and the care or treatment at issue involves that specialty or subspecialty recognized by the American Board of Medical Specialties or the American Osteopathic Association, the person providing the testimony shall have specialized at the time of the occurrence that is the basis for the action in the same specialty or subspecialty, recognized by the American Board of Medical Specialties or the American Osteopathic Association, as the party against whom or on whose behalf the testimony is offered, and if the person against whom or on whose behalf the testimony is being offered is board certified and the care or treatment at issue involves that board specialty or subspecialty recognized by the American Board of Medical Specialties or the American Osteopathic Association, the expert witness shall be: (1) a physician credentialed by a hospital to treat patients for the medical condition, or to perform the procedure, that is the basis for the claim or action; or (2) a specialist or subspecialist recognized by the American Board of Medical Specialties or the American Osteopathic Association who is board certified in the same specialty or subspecialty, recognized by the American Board of Medical Specialties or the American Osteopathic Association, and during the year immediately preceding the date of the occurrence that is the basis for the claim or action, shall have devoted a majority of his professional time to either: (a) the active clinical practice of the same health care profession in which the defendant is licensed, and, if the defendant is a specialist or subspecialist recognized by the American Board of Medical Specialties or the American Osteopathic Association, the active clinical practice of that specialty or subspecialty recognized by the American Board of Medical Specialties or the American Osteopathic Association; or (b) the instruction of students in an accredited medical school, other accredited health professional school or accredited residency or clinical research program in the same health care profession in which the defendant is licensed, and, if that party is a specialist or subspecialist recognized by the American Board of Medical Specialties or the American Osteopathic Association, an accredited medical school, health professional school or accredited residency or clinical research program in the same specialty or subspecialty recognized by the American Board of Medical Specialties or the American Osteopathic Association; or (c) both. b. If the party against whom or on whose behalf the testimony is offered is a general practitioner, the expert witness, during the year immediately preceding the date of the occurrence that is the basis for the claim or action, shall have devoted a majority of his professional time to: (1) active clinical practice as a general practitioner; or active clinical practice that encompasses the medical condition, or that includes performance of the procedure, that is the basis of the claim or action; or (2) the instruction of students in an accredited medical school, health professional school, or accredited residency or clinical research program in the same health care profession in which the party against whom or on whose behalf the testimony is licensed; or (3) both. c. A court may waive the same specialty or subspecialty recognized by the American Board of Medical Specialties or the American Osteopathic Association and board certification requirements of this section, upon motion by the party seeking a waiver, if, after the moving party has demonstrated to the satisfaction of the court that a good faith effort has been made to identify an expert in the same specialty or subspecialty, the court determines that the expert possesses sufficient training, experience and knowledge to provide the testimony as a result of active involvement in, or full-time teaching of, medicine in the applicable area of practice or a related field of medicine. d. Nothing in this section shall limit the power of the trial court to disqualify an expert witness on grounds other than the qualifications set forth in this section. e. In an action alleging medical malpractice, an expert witness shall not testify on a contingency fee basis. f. An individual or entity who threatens to take or takes adverse action against a person in retaliation for that person providing or agreeing to provide expert testimony, or for that person executing an affidavit pursuant to the provisions of P.L.1995, c.139 (C.2A:53A-26 et seq.), which adverse action relates to that person's employment, accreditation, certification, credentialing or licensure, shall be liable to a civil penalty not to exceed $10,000 and other damages incurred by the person and the party for whom the person was testifying as an expert. L.2004,c.17,s.7.