EU European Health Insurance Card (EHIC) Number Regex for Python

What this pattern does

This page provides a lightweight, single-purpose regular expression for matching eu european health insurance card (ehic) number, ported and verified for Python. Identity and credential patterns need both correctness and safety, since they're frequent targets for adversarial input. The snippet below is ready to drop into your Python project — whether you're validating in a Django view, a FastAPI endpoint, or a standalone data processing script.

Python Implementation

# EU European Health Insurance Card (EHIC) Number
# ReDoS-safe | RegexVault — Identity & PII > Health Identifiers

import re

eu_european_health_insurance_card_ehic_number_pattern = re.compile(r'^[A-Z0-9]{8,20}$')

def validate_eu_european_health_insurance_card_ehic_number(value: str) -> bool:
    return bool(eu_european_health_insurance_card_ehic_number_pattern.fullmatch(value))

# Example
print(validate_eu_european_health_insurance_card_ehic_number("12345678"))  # True

Test Cases

When to use this pattern

This pattern is drawn from the Identity & PII > Health Identifiers category and carries a ReDoS-safe certification. That matters for Python developers because particularly important in Python web servers where CPU-bound regex operations can stall concurrent request handling. RegexVault audits patterns against known backtracking attack vectors, ensuring you have the necessary context before using this regex in a high-stakes production environment.

Common Pitfalls

Technical Notes

EHIC personal identification numbers vary significantly by issuing country. The card itself contains: country code, personal identification number, card number, and expiry date. Use country-specific patterns when the issuing country is known. UK issued the Global Health Insurance Card (GHIC) post-Brexit.