UK CHI Number (Scotland)

Detects Scottish Community Health Index (CHI) 10-digit patient identifiers used by NHS Scotland.

Type

regex

Engine

boost_regex

Confidence

medium

Confidence justification

Medium confidence: 10-digit sequences are common; CHI keywords mandatory.

Jurisdictions

uk

Regulations

UK GDPR, Data Protection Act 2018

Frameworks

ISO 27001, ISO 27701

Data categories

pii, phi, government-id, healthcare

Scope

narrow

Risk rating

9

Platform compatibility

Purview: Compatible, GCP DLP: Compatible, Macie: Compatible, Zscaler: Compatible, Palo Alto: Compatible, Netskope: Compatible

Pattern

\b\d{10}\b

Corroborative evidence keywords

CHI number, [object Object], Community Health Index, NHS Scotland, [object Object], medical record number, patient ID, [object Object], [object Object], medicare, medicaid, insurance ID, member ID, beneficiary, ID number, identification, ID card, license, permit, registration (+1 more)

Proximity: 300 characters

Should match

• 1234567890 — 10-digit CHI
• 0987654321 — Alt
• 1122334455 — Third

Should not match

• 123456789 — 9 digits
• 12345678901 — 11 digits
• 123456789A — Letter

Known false positives

• Other 10-digit IDs. Mitigation: Require CHI/NHS Scotland keywords.