A Practice Note for counsel to use when offering medical evidence at trial in personal injury, wrongful death, and medical malpractice actions under New York law. This Note explains general admissibility standards for medical evidence at trial, including the requirements that medical evidence be relevant, authentic, and pertain to diagnosis, prognosis, or treatment. It discusses the applicability of certain Civil Practice Law and Rules (CPLR) provisions that counsel may use when offering medical records in evidence, how to lay a proper foundation for the admissibility in evidence of medical records and witness testimony, and how to use medical records and testimony to prove liability, causation, and damages under New York law.