Finland European Health Insurance Number

Detects Finland European 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: ten-digit numbers appear in many contexts. Keywords like 'Kela' or 'EHIC' are needed to confirm this is a Finnish health insurance number. Context label evidence plus explicit template/example exclusion improves precision for high-risk identifiers. Added context gating and exclusion rules improve precision and reduce incidental matches.

Detection quality

Verified

Jurisdictions

fi, eu

Regulations

BDSG, CNIL / LIL, GDPR

Frameworks

ISO 27001, ISO 27701, SOC 2

Data categories

phi, health, government-id

Scope

narrow

Risk rating

8

Platform compatibility

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

Pattern

\b\d{10}\b

Corroborative evidence keywords

EHIC, health insurance, Kela, sairausvakuutus, terveydenhuolto, eurooppalainen sairaanhoitokortti, Kela-kortti, sairasvakuutuskortti, sairausvakuutustunnus, terveyskortti, vakuutusnumero, field, column, row, entry, record, value, form, register, database (+20 more)

Proximity: 300 characters

Should match

• 1234567890 — Ten-digit Finnish EHIC number format
• 9876543210 — Ten-digit health insurance identifier
• 5566778899 — Ten-digit Kela insurance number

Should not match

• 123456789 — Nine digits, too short for Finnish EHIC
• 12345678901 — Eleven digits, exceeds Finnish EHIC format
• sample template placeholder number 123456789 — Template/sample context should be excluded even when numeric-like values appear
• 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

• Finland European Health Insurance Number entity definition - Microsoft Learn