Healthcare Vendor Identifier Validator

A DUNS (Data Universal Numbering System) number is a unique 9-digit identifier assigned by Dun & Bradstreet to business entities. Hospitals and health systems use DUNS numbers to verify vendor identity during supplier onboarding, maintain accurate vendor master records, and comply with federal reporting requirements. An incorrect DUNS number can lead to vendor payment mismatches and procurement compliance issues.

NPI (National Provider Identifier) is a 10-digit number assigned by CMS to healthcare providers. NPI validation uses the Luhn algorithm with a prefix of "80840" (the health industry identifier). The check digit is the last digit of the NPI and must satisfy the Luhn formula when combined with this prefix. This catches common transcription errors like transposed or missing digits.

Healthcare organizations must report payments to vendors via IRS Form 1099. An incorrect EIN/TIN causes 1099 filing rejections, potential B-Notice penalties, and IRS backup withholding requirements. Validating the EIN format and IRS campus prefix during vendor onboarding prevents these downstream issues.

ABA routing numbers identify the financial institution for ACH (Automated Clearing House) payments. Healthcare AP departments use ACH to pay vendors electronically — which is faster and cheaper than paper checks. An incorrect routing number causes payment rejections, delayed vendor payments, and potential vendor credit holds on medical supply orders.

No. Auxtri's check digit validator runs entirely in your browser. Your vendor identifiers never leave your device — nothing is uploaded, stored, or transmitted.