I’m not sure why you think we require 100% accuracy. The actual level depends on many factors. For example, the expert determination method of deidentification

I’m not sure why you think we require 100% accuracy. The actual level depends on many factors. For example, the expert determination method of deidentification in hipaa safe harbor [0] can allow up to 1% reidentification and still be considered anonymized. This is how medical providers share notes without manually reviewing them all. [0] https://www.hhs.gov/hipaa/for-professionals/privacy/special-topics/de-identification/index.html https://www.hhs.gov/hipaa/for-professionals/privacy/special-...