The first half of this series, addressing the historical development of the law in New York on the professional reliability exception to the rule against hearsay, was published in this space on Sept. 18, 2023. The subject of this second segment is how the professional reliability exception has been applied to the process of medical malpractice adjudication. There are few clear indications of the line between what is and what is not admissible, but there are enough reported cases to provide some insight as to where that line runs.