NHS number check (UK)

Client

Validate UK NHS number 10-digit format with mod-11 check.

Valid NHS number format: 9434765919

Nearby workflows on Toolcore

  • NPI check digit — US National Provider Identifier—10 digits, CMS Luhn on 80840 + NPI; entity type 1/2; no registry lookup; browser-only. when another identifier column uses a different checksum ruleset.
  • Luhn checksum (mod 10) — Paste a digit string (spaces ignored)—pass or fail Luhn for PANs, IMEI-style IDs, and test vectors; browser-only. when another identifier column uses a different checksum ruleset.
  • UUID validator — Validate UUID and GUID strings: version, RFC 4122 variant, bulk paste—browser-only, no upload. when another identifier column uses a different checksum ruleset.
  • LEI checksum — Twenty-character Legal Entity Identifier—ISO 17442 MOD-97-10 check digits; no GLEIF lookup; browser-only. when another identifier column uses a different checksum ruleset.

About this tool

Mod-11 check digit—no live NHS lookup.

Common use cases

  • NHS number check (UK) for quick local checks without uploading data.
  • Copy results into tickets, docs, or classroom notes.

Common mistakes to avoid

  • Unexpected input shape

    See the intro and how-to notes for accepted formats.

FAQ

Is processing local?

Yes—this runs entirely in your browser.

Agent prefill?

Use q or qb for the main text field when supported.

More tools

Related utilities you can open in another tab—mostly client-side.