Lovelace patients can once again schedule appointments and refill prescriptions online.

Lovelace Health System restored access to its patient portal, MyChart, on Thursday. The system was down following a cyberattack on Ardent Health Services, Lovelace’s parent company, detected on Thanksgiving.

The inaccessible patient portal caused difficulties for some people in rescheduling appointments, getting prescriptions filled — which they had to do in person — and contacting Lovelace staff for help. The attack also led Lovelace to reroute emergency room patients to other hospitals for days following the cyberattack.

With MyChart running again, patients can virtually schedule or reschedule appointments, view medications and request prescription refills, send messages to providers, pay their bills and view test results.

Not all the MyChart features are back up yet, including video visits and access to financial statements, according to Lovelace. The health system said it is working to restore these features and other systems as quickly as possible.

When logging into MyChart again, people will have to reset their passwords.

It’s still unclear if any patient personal or financial information was compromised in the cyberattack. An investigation into the incident is ongoing, according to Ardent.

The health services company said if anyone’s protected health or personally identifiable information is involved, Ardent will notify them in accordance with applicable law.

“We sincerely regret any inconvenience this incident has caused and encourage patients who have questions about their care or other clinical matters to contact their provider through MyChart or by phone,” Lovelace marketing director Raschel Brennan said in a statement.