ER (1994) to Law & Order: UK

A reporter on Chicago Hope talked to Dr. Austin about having been accepted into the space program and mentions an ER doctor from County was also accepted. In a separate episode of ER Dr. Greene was accepted in the space program.

Chicago Hope's Jeffrey Geiger accepted an organ of a victim on Homicide

Law and Order and Homicide crossed over on four episodes

Part of the Law & Order Universe