A health data breach that impacted the Healthcare.gov portal last month could have helped hackers steal sensitive personal data like partial SSNs (Social Security Numbers, tax information etc) The data might include names, date of birth, addresses, last four digits of SSN (if SSN was provided on the Health Insurance Marketplace applications), tax filing status, family relationships, immigration document types and numbers, employer name, health insurance-related data. Bank account numbers and credit card numbers were not among the data that was accessible to the hackers.”]
Source: https://hackercombat.com/healthcare-gov-health-data-breach-exposes-personal-data/