United States national provider identifier, the ten digit number CMS issues to a healthcare provider, always beginning with 1 or 2. The leading digit rule removes most random ten digit runs, but the pattern is still ten digits and nothing else, so treat it as context gated rather than standalone. Collision: the existing uk-nhs matches any bare ten digits and fires on the identical span, and the existing us-phone does too. A health config for the United States must not enable uk-nhs and us-npi together without a resolution rule.
Label: US_NPI
\b[12]\d{9}\bNPI 1234567893 on the claim form. → 1234567893Le prestataire 1999999992 figure au registre. → 19999999923234567893123456789Tags: us, health, identity