Unveiling the Deceptive Nature of Anonymized Medical Patient Data

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HealthConsent Staff

Your Privacy

The matter of privacy has gained unprecedented significance, particularly when it comes to medical data. A recent article titled “De-Identifying Medical Patient Data Doesn’t Protect Our Privacy” suggests that the current methods have limitations and that securing patient data requires a more comprehensive approach.

De-identification, which involves purging personally identifiable information (PHI) from data so that it can be utilized for research and other purposes without compromising individual privacy, may not guarantee complete anonymity, according to the article’s authors. They contend that even after de-identification, medical data can still potentially disclose sensitive information about patients.


De-identified data is prone to be re-identified through a process known as “linkage attacks,” where one could integrate various data sets to determine individuals in the de-identified data. For instance, a person may add publicly accessible data about a patient’s age, gender, and ZIP code to re-identify that patient.

The authors continue to note that de-identification is a continuous process. As fresh data is integrated into the de-identified data set, the possibility of re-identification increases. As such, de-identified data can never be entirely considered anonymous.


While de-identification may be vital for specific uses of medical data, the authors recommend the necessity of alternative privacy protection measures. Using differential privacy, which means adding “noise” to data can prevent re-identification, is one potential solution. Another remedy is to limit medical data access to a restricted number of individuals or organizations.

The issue of privacy in medical data is complex, and de-identification may not suffice in preserving individual privacy. More analysis and discussion are required to create methods of privacy protection.

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De-Identifying Medical Patient Data Doesn’t Protect Our Privacy