Navicent Health announced in March that they suffered a data breach through unauthorized access to their email systems. This breach has exposed the personal information of 270,000 patients, with some social security numbers being disclosed. This data included names, dates of birth, addresses and billing and appointment information. Navicent will be offering a free one year credit monitoring service to those whose Social Security Numbers were exposed. There is no indication that any of this information has been fraudulently used, but credit monitoring will be offered to those affected.
Source: https://www.bleepingcomputer.com/news/security/navicent-health-data-breach-exposes-patients-personal-info/