SEGUIN — More than 800 clients of Seguin Emergency Medical Service may have had personal information taken by a computer hacker getting data from a company that does billing for ambulance services.

The city of Seguin was among six Texas customers of Advanced Data Processing Inc., doing business as Intermedix, whose data may have been disclosed to a theft ring suspected of filing fraudulent federal tax returns. Besides Seguin EMS, the others are the Victoria Fire Department, the city of Azle, the city of Bonham Fire Department, Harris County Emergency Corps and Washington County EMS.

Intermedix notified those entities that an employee of the company had illegally accessed billing data. The employee admitted what he had done and was immediately terminated, the company said in a news release.

Intermedix said it is working with federal and local law enforcement agencies that are conducting criminal investigations.

The company’s own investigation showed there had been unauthorized access to billing data and, in some cases, disclosure of personal information including names, Social Security numbers and dates of birth.

No medical information was accessed or disclosed, Intermedix said.

Seguin Fire Chief Dale Skinner said he was aware of the hacking of Intermedix data. He said the company was handling it and that the situation was being handled locally by City Attorney Andy Quittner.

Quittner said the data hacking may have involved 839 clients of Seguin EMS.

He said Intermedix was notifying customers whose data might have been illegally disclosed, a task the city would have had difficulty accomplishing.

“I don’t know that we would have contact information for all of them,” Quittner said. “They’re from all over the place.”

He said some of those who received notifications from Intermedix had called City Hall to ask questions, but he hadn’t heard that anyone locally had been a victim of the filing of a fraudulent income tax return.

“That company does a pretty good job, all in all,” Quittner said of Intermedix.

The company advises those who believe they were affected to review credit card and account statements and monitor their credit reports for unauthorized activity.

Identity theft experts are available to offer additional help from 8 a.m. to 8 p.m. Monday-Friday by calling 1-877-264-9622. Information also is available online at

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