NextGen Healthcare was added to the leak site by the BlackCat (aka ALPHV) ransomware group.
However, they contained the threat, secured our network, and returned to normal operations.
The threat actor behind the incident claimed to provide data and all information if the company does not pay.
Source: https://www.databreaches.net/blackcat-adds-nextgen-to-its-leak-site-but-where-did-it-go/
"id": "NEX164822123",
"linkid": "nextgenhealthcareinc",
"type": "Ransomware",
"date": "01/2023",
"severity": "100",
"impact": "5",
"explanation": "Attack threatening the organization’s existence"