PHI Detector - More on Nightfall's HIPAA Compliance Detector

Learn how to ensure HIPAA compliance in your collaborative cloud applications

The Health Insurance Portability and Accountability Act of 1996 (HIPAA) is a federal law protecting the disclosure of individuals' health information (aka protected health information or PHI).

Nightfall's PHI detector identifies PHI with high accuracy and relevancy using 15 PII and healthcare entity detectors combined, as described in Tables 1 & 2.

Table 1: Nightfall PHI detector = Nightfall PII + Healthcare detectors in specfic combinations

PII Group 1PII Group 2PII Group 3+Health Indicator

One or more




One or more

  • US Social Security Number (SSN)

  • Vehicle Identification Number (VIN)

  • Device Identifiers

  • Medical Beneficiary Identifier (MBI)

  • US Health Insurance Claim Number

  • US Individual Taxpayer Identification Number (ITIN)

  • Person Name

  • Date of Birth

  • Person Name

  • Street Address


  • ICD10 Code

  • ICD10 Description

  • Nation Provider Identifier (NPI)

  • FDA Drug Name

  • FDA Drug Code

Please refer to the Nightfall Detector Glossary for more information on the individual detectors above.

Table 2: Nightfall PHI detection confidence

DetectionCombination Logic

PHI (Very Likely)

PII Group 1, 2, or 3 AND a Health Identifier are found, all with Very Likely confidence.

PHI (Likely)

PII Group 1, 2, or 3 AND a Health Identifier are found, some with Likely confidence.

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