Healthcare Compliance
Medicare MBI Validator
Verify the 11-character alphanumeric structure of a US Medicare card based on strict CMS rules.
HIPAA / Privacy Compliant. This validation engine runs entirely in your local browser. Health identities are never logged, stored, or transmitted to any external server.
Awaiting Input
Enter an 11-character MBI to validate.
CMS Positional Analysis
Number
Letter
Either
Disclaimer: This tool verifies the mathematical format established by the Centers for Medicare & Medicaid Services (CMS). It ensures the string adheres to the 11-character logic and excludes prohibited letters (S, L, O, I, B, Z) designed to prevent visual confusion with numbers. A structurally valid result does not confirm active Medicare coverage.