Singapore NRIC (used as health ID) Regex for JavaScript

What this pattern does

This page provides a lightweight, single-purpose regular expression for matching singapore nric (used as health id), ported and verified for JavaScript. 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 JavaScript project — whether you're validating in an Express middleware, a Next.js API route, or a client-side form.

Javascript Implementation

// Singapore NRIC (used as health ID)
// ReDoS-safe | RegexVault — Identity & PII > Health Identifiers

const singaporeNricUsedAsHealthIdRegex = /^([STFGM][0-9]{7}[A-Z])$/;

function validateSingaporeNricUsedAsHealthId(input: string): boolean {
  return singaporeNricUsedAsHealthIdRegex.test(input);
}

// Example
console.log(validateSingaporeNricUsedAsHealthId("S1234567D")); // 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 JavaScript developers because especially critical in long-running Node.js event loops where a ReDoS vulnerability can block the entire process. 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

Singapore uses the NRIC number as the universal identifier across all government systems including healthcare. MOH (Ministry of Health), Polyclinic, and hospital systems all use NRIC as the patient identifier. See pii-nid-01 for full notes.