Professional License Number (US, Generic) Regex for JavaScript

What this pattern does

This page provides a lightweight, single-purpose regular expression for matching professional license number (us, generic), 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

// Professional License Number (US, Generic)
// ReDoS-safe | RegexVault — Identity & PII > Professional Identity

const professionalLicenseNumberUsGenericRegex = /^[A-Z]{2}[0-9A-Z]{5,15}$/;

function validateProfessionalLicenseNumberUsGeneric(input: string): boolean {
  return professionalLicenseNumberUsGenericRegex.test(input);
}

// Example
console.log(validateProfessionalLicenseNumberUsGeneric("CA12345678")); // true

Test Cases

When to use this pattern

This pattern is drawn from the Identity & PII > Professional Identity 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

Professional licenses (medical, legal, engineering, nursing) are state-issued in the US. Formats vary by profession and state. Combine with license type (MD, RN, JD, PE) for meaningful validation. Verify against state licensing board databases for active status.