France Health Insurance Number

Detects France Health Insurance Number patterns. This pattern is based on a Microsoft Purview built-in sensitive information type. Due to the generic numeric format, corroborative evidence keywords are essential for reliable detection.

Type

regex

Engine

universal

Confidence

medium

Confidence justification

Medium confidence: the French health insurance number has a distinctive format starting with 1 or 2 followed by 13 digits with a specific structure encoding gender, birth year, month, and department. Added context gating and exclusion rules improve precision and reduce incidental matches.

Detection quality

Verified

Jurisdictions

fr, eu

Regulations

BDSG, CNIL / LIL, GDPR

Frameworks

ISO 27001, ISO 27701, SOC 2

Data categories

phi, health, pii

Scope

narrow

Risk rating

8

Platform compatibility

Purview: Compatible, GCP DLP: Compatible, Macie: Compatible, Zscaler: Compatible, Palo Alto: Compatible, Netskope: Compatible

Pattern

\b[12]\s?\d{2}\s?\d{2}\s?\d{2}\s?\d{3}\s?\d{3}\s?\d{2}\b

Corroborative evidence keywords

sécurité sociale, numéro de sécu, carte vitale, assurance maladie, NIR, [object Object], affilié, caisse primaire, CPAM, immatriculation, numéro de sécurité sociale, numéro SS, régime général, data record, database record, record set, data extract, data export, database table, spreadsheet (+17 more)

Proximity: 300 characters

Should match

• 1 85 05 78 006 084 36 — Standard spaced French social security number format
• 2 93 11 75 123 456 78 — Female social security number with spaces
• 185057800608436 — Continuous digits without spaces

Should not match

• 3 85 05 78 006 084 36 — Starts with 3, invalid gender digit
• 1 85 05 78 006 08 — Too few digits for social security number
• template example placeholder record identifier — Template/sample context should be excluded even when anchor words are present

Known false positives

• Generic numeric sequences matching the digit pattern in non-health contexts Mitigation: Require corroborative evidence keywords within the proximity window to distinguish health identifiers from general numeric data.
• Reference numbers or account identifiers from other domains with similar digit counts Mitigation: Layer with document classification to prioritise matches in health and medical documents.

References

• France Health Insurance Number entity definition - Microsoft Learn