feat(analyzer): Add Healthcare identifiers recognizer

[bhargavikalicheti]

Change Description

Adds conservative, context-aware US healthcare identifier recognizers to Presidio Analyzer.

New disabled-by-default recognizers:

• US_HEALTH_INSURANCE_MEMBER_ID
• US_PRIOR_AUTHORIZATION_NUMBER
• US_CLAIM_NUMBER
• US_PRESCRIPTION_NUMBER
• US_REFERRAL_NUMBER
• US_PROVIDER_TAX_ID

These recognizers require both a plausible identifier pattern and nearby healthcare/insurance workflow context to reduce false positives. They also include negative-context checks for similar-looking non-healthcare IDs such as order numbers, tracking numbers, case numbers and invoice numbers where applicable.

Issue reference

Fixes Feature Request: Healthcare Recognizer for Common Healthcare Identifiers (Member ID, Claims, Prior Authorization, etc.)
#2136

Checklist

• I have reviewed the contribution guidelines
• I agree to follow this project's Code of Conduct
• I confirm that I have the right to submit this contribution and that it does not knowingly contain proprietary or confidential code.
• My code includes unit tests
• All unit tests and lint checks pass locally
• My PR contains documentation updates / additions if required

[bhargavikalicheti]

Hi @SharonHart @omri374 , No rush - gentle reminder on PR whenever you get a chance. Thank you!

[Copilot]

Pull request overview

Adds a set of conservative, disabled-by-default US healthcare identifier recognizers to Presidio Analyzer, aiming to detect common healthcare administrative IDs only when appropriate workflow context is present (to reduce false positives in general alphanumeric/ID-like text).

Changes:

• Introduces new US healthcare admin ID recognizers (claim, prior auth, prescription, referral, provider tax ID) plus a health insurance member ID recognizer, all requiring nearby context.
• Wires the new recognizers into predefined recognizer exports and default registry YAML (disabled by default).
• Adds unit tests, supported-entities documentation entries, and changelog notes for the new entities/recognizers.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
presidio-analyzer/tests/test_us_healthcare_admin_recognizers.py	New tests for healthcare admin ID recognizers (positive/negative context + metadata).
presidio-analyzer/tests/test_us_health_insurance_member_id_recognizer.py	New tests for health insurance member ID recognizer detection behavior and metadata.
presidio-analyzer/presidio_analyzer/predefined_recognizers/country_specific/us/us_healthcare_admin_recognizers.py	Adds context-required pattern recognizer base + concrete admin ID recognizers.
presidio-analyzer/presidio_analyzer/predefined_recognizers/country_specific/us/us_health_insurance_member_id_recognizer.py	Adds context-required member/subscriber ID recognizer with negative-context pruning.
presidio-analyzer/presidio_analyzer/predefined_recognizers/country_specific/us/init.py	Exports the new US healthcare recognizers from the US package.
presidio-analyzer/presidio_analyzer/predefined_recognizers/init.py	Exposes the new recognizers via the top-level predefined_recognizers import surface.
presidio-analyzer/presidio_analyzer/conf/default_recognizers.yaml	Registers the recognizers as predefined + disabled-by-default with country_code: us.
docs/supported_entities.md	Documents the new supported entity types and brief descriptions.
CHANGELOG.md	Notes new analyzer recognizers under Unreleased.

[omri374]

Thanks! Please add references to be able to trace where the regex pattern is coming from, and see the comment around context management.

[bhargavikalicheti]

@SharonHart @omri374 Hi! Just a friendly follow up on my PR whenever you have a chance. I'd appreciate a review when your schedule allows. Please let me know if there are any changes you'd like me to make. Thanks!