Table 1.

Possible protected health information classes of terms.

Class	Subclasses
Name	Patient, clinician, username
Profession	—
Location	Hospital, organization, street, city, state, country, zip, other
Age	—
Date	—
Contact	Phone, fax, email, URL, Internet Protocol addressa
Identification	Social security numbera, medical record number, health plan number, account numbera, license numbera, vehicle identificationa, device identification, biometric identification, identification number

^aClasses that are not present in the published data set [7].