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Table 1 18 Categories of HIPAA PHI [3]

From: Survey on RNN and CRF models for de-identification of medical free text

Dates, except year
Telephone numbers
Geographic data
FAX numbers
Social security numbers
Email addresses
Medical record numbers
Account numbers
Health plan beneficiary numbers
Certificate/license numbers
Vehicle identifiers and serial numbers including license plates
Web URLs
Device identifiers and serial numbers
Internet protocol addresses
Full face photos and comparable images
Biometric identifiers (i.e. retinal scan, fingerprints)
Any unique identifying number or code