Providence-based Ortho Rhode Island faced a three-day outage in September following a system hack, according to a Nov. 6 report from ABC affiliate WPRI.
At the time, the practice faced a phone outage that lasted for three days, with online patient services restored Sept. 17.
A spokesperson for Ortho Rhode Island said that a hacker initially shut down the systems, and once the system regained control, it kept its systems offline "until our third-party forensic specialists confirmed there was no further risk."
The practice has not said how many people were impacted by the hack, but believes the hacker obtained data for a "significant percentage" of patients.
Exposed data may include names, addresses, billing and health insurance information. It could have also compromised medical information like X-rays, diagnoses, test results and other treatment information.
Ortho Rhode Island said the suspicious activity was found on Sept. 7 and an investigation revealed that files were taken by the hacker between Sept. 4 and Sept 8.
"I understand that this has caused frustration among our patients, community and team, and I am grateful to everyone for their patience as we have worked diligently to continue operations while also addressing the attack," Ortho Rhode Island CEO Michael Bradley said in a statement.