Add US CLIA recognizer for clinical laboratory identifiers

[Manas103]

Change Description

Adds a new predefined recognizer, UsCliaRecognizer, for the US Clinical Laboratory Improvement Amendments (CLIA) number — a 10-character identifier issued by CMS to certify clinical laboratories. CLIA numbers appear on lab orders, lab reports, and Medicare claims for laboratory services, and they are a common form of PHI in healthcare text.

Format (per CMS): NN D NNNNNNN

• Positions 1–2: 2-digit numeric state code
• Position 3: literal letter D (designates "lab")
• Positions 4–10: 7-digit unique sequence

Example: 11D2030122. Reference: https://www.cms.gov/medicare/quality/clinical-laboratory-improvement-amendments

Why no checksum?

CLIA numbers do not have a publicly documented check-digit algorithm. The base regex therefore carries a low confidence (0.1 weak / 0.4 with separators), and the recognizer leans on context words (CLIA, lab, laboratory, clinical laboratory, lab id, lab number, …) to reach a confident match via the analyzer's context-enhancement layer. Degenerate sequences where all 7 trailing digits are identical (e.g. 11D0000000, 11D1111111) are rejected in invalidate_result as obvious placeholders. This matches the regex-only-with-context approach already used elsewhere in the codebase (e.g. UsMbiRecognizer, AbaRoutingRecognizer's weak tier).

What changed

• New file: presidio-analyzer/presidio_analyzer/predefined_recognizers/country_specific/us/us_clia_recognizer.py — UsCliaRecognizer(PatternRecognizer) with COUNTRY_CODE = "us", SUPPORTED_ENTITY = "US_CLIA", two patterns (weak / with separators), 8 context words, and an invalidate_result that filters degenerate trailing sequences.
• Registry plumbing: imported and re-exported from both predefined_recognizers/__init__.py and predefined_recognizers/country_specific/us/__init__.py, with __all__ updated.
• YAML: new entry in presidio-analyzer/presidio_analyzer/conf/default_recognizers.yaml with enabled: false and country_code: us, matching the convention used by UsMbiRecognizer and UsNpiRecognizer.
• Tests: new presidio-analyzer/tests/test_us_clia_recognizer.py with 12 parametrized cases (valid, lowercase d, dashed, spaced, multi-match, malformed, degenerate) plus 5 behavior tests (supported_entity, supported_language, context words, country code).
• Docs: docs/supported_entities.md row added; CHANGELOG.md Unreleased Analyzer/Added bullet.

Issue reference

No existing issue tracks this; CLIA was a notable gap in the US healthcare-PII coverage alongside the already-present US_NPI, US_MBI, and MEDICAL_LICENSE (DEA) recognizers.

How to verify

cd presidio-analyzer
pytest tests/test_us_clia_recognizer.py -v

All 17 tests pass. The new module has 100% line coverage (measured via coverage run --source=...us_clia_recognizer -m pytest tests/test_us_clia_recognizer.py).

Smoke check:

from presidio_analyzer.predefined_recognizers import UsCliaRecognizer

r = UsCliaRecognizer()
r.analyze("Laboratory ID 11D2030122 on the report", ["US_CLIA"])
# -> [type: US_CLIA, start: 14, end: 24, score: 0.1]
# (Score is then context-boosted by AnalyzerEngine via the "laboratory" context word.)

Checklist

• I have reviewed the contribution guidelines
• I have signed the CLA (if required) — will sign when the CLA-bot fires on PR open
• My code includes unit tests
• All unit tests and lint checks pass locally
• My PR contains documentation updates / additions if required

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[omri374]

As this doesn't add additional guards over the regex, I would suggest to remove it.

[omri374]

Please add another example where the CLIA number is in the middle of a sentence

[Copilot]

Pull request overview

Adds first-class Presidio Analyzer coverage for US CLIA (Clinical Laboratory Improvement Amendments) identifiers by introducing a new predefined, US-specific pattern recognizer and wiring it into the registry, tests, and public documentation.

Changes:

• Added UsCliaRecognizer (US_CLIA) as a country-specific predefined PatternRecognizer with weak/medium regex tiers plus placeholder/degenerate-value invalidation.
• Exported the recognizer through the predefined recognizers package and registered it in default_recognizers.yaml (disabled by default).
• Added unit tests, updated supported entities documentation, and documented the change in CHANGELOG.md.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
presidio-analyzer/presidio_analyzer/predefined_recognizers/country_specific/us/us_clia_recognizer.py	Implements the new US CLIA recognizer with patterns, context terms, and invalidation logic.
presidio-analyzer/presidio_analyzer/predefined_recognizers/country_specific/us/init.py	Re-exports UsCliaRecognizer from the US country-specific package.
presidio-analyzer/presidio_analyzer/predefined_recognizers/init.py	Re-exports UsCliaRecognizer from the top-level predefined recognizers package.
presidio-analyzer/presidio_analyzer/conf/default_recognizers.yaml	Registers UsCliaRecognizer as predefined, US-tagged, and disabled by default.
presidio-analyzer/tests/test_us_clia_recognizer.py	Adds unit coverage for matching, boundaries, scoring ranges, and metadata expectations.
docs/supported_entities.md	Documents the new US_CLIA entity type in the supported entities list.
CHANGELOG.md	Adds an Unreleased Analyzer “Added” entry for the new recognizer.