Tens of thousands of people had their personal information exposed after a hack of a computer system that works with Healthcare.gov.
The Centers for Medicare and Medicaid Services said there was exposure of about 75,000 through the direct enrollment pathway.
The portal allows agents and brokers to help consumers with their applications for healthcare coverage in the exchanges.
CMS in a statement said accounts exposed by the hack were deactivated, and the direct enrollment pathway disabled.
Suspicious activity in the computer system was initially investigated on October 13th with the breach confirmed three days later.
A CMS administrator says open enrollment - which begins next month - will not be impacted.
Officials said Healthcare.gov and the marketplace call center are still available to customers.
