A federal judicial panel has transferred more than 40 class actions involving a data breach that ensnared Quest Diagnostics to New Jersey, near the headquarters of the medical testing company.

The U.S. Judicial Panel on Multidistrict Litigation ordered the transfer Wednesday of all the lawsuits, brought over a breach of data at American Medical Collection Agency Inc., a billing collection service. The breach compromised the private information of more than 20 million people, including 11.9 million patients at Quest Diagnostics Inc. and 7.7 million at Laboratory Corp. of America, based in Burlington, North Carolina.