More than 10 people who found treatments they never received recorded in their digital health histories on Monday petitioned the Public Health Ministry, demanding answers within 15 days or they would pursue legal action.
The group, led by Foundation for Justice Restoration Campaign vice-president Raphatsit Phatarasirichaisin, submitted a letter to Public Health Minister Pattana Promphat through the ministry's complaints centre.
The move follows reports that incorrect health records were uploaded to the government's Mor Prom and Tang Rat applications through the Health Link system, resulting in treatment histories appearing in patients' digital medical records that they say were inaccurate.
Mr Raphatsit said the victims wanted a formal written explanation rather than public statements attributing the errors to "human error" or duplicate names.
"We do not believe this is simply human error," he said, adding that more than 100 affected people had joined an online support group after discovering medical histories that did not match their actual treatment records.
He warned that inaccurate records could affect health and life insurance applications, as insurers routinely review applicants' medical histories. They could also pose risks if doctors unknowingly relied on incorrect information when treating patients.
The group called on the ministry to investigate hospitals, agencies and individuals involved in entering the data, correct all inaccurate records and issue certification confirming that the errors were caused by system failures rather than patients' medical histories.
It also demanded that the ministry report its findings within 15 days. Otherwise, the group said it would pursue criminal proceedings under the Computer Crime Act, the Personal Data Protection Act and other relevant laws.
Mr Raphatsit said many affected people had avoided going public over concerns that the false records could harm future insurance applications or claims.
According to the group, most reported cases originated in the Northeast, followed by the North, with many involving tambon health promotion hospitals. Some inaccurate records had appeared repeatedly over several years, raising questions about claims that the problems were isolated data-entry errors.
