Professional License Number (US, Generic) Regex for Go

What this pattern does

This page provides a lightweight, single-purpose regular expression for matching professional license number (us, generic), ported and verified for Go. 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 Go project — whether you're validating in a Gin handler, a gRPC service, or a command-line tool.

Go Implementation

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

package validation

import "regexp"

var professionalLicenseNumberUsGenericRe = regexp.MustCompile(`^[A-Z]{2}[0-9A-Z]{5,15}$`)

func ValidateProfessionalLicenseNumberUsGeneric(s string) bool {
    return professionalLicenseNumberUsGenericRe.MatchString(s)
}

// Example
// fmt.Println(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 Go developers because Go's RE2 engine is inherently safe from catastrophic backtracking, but this pattern has been additionally verified for correctness. 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.