ISO 15189 Process Framework (No Standard Text)

Research basis: 2026-10-01. This reference summarizes a preparation process and evidence architecture for medical laboratory quality and competence work. It does not reproduce requirements and is not a substitute for the standard.

Copyright and authorized access

ISO publications are copyrighted. Obtain ISO 15189 from ISO, an ISO national member, or another authorized source; see ISO copyright. Do not ask an agent to retrieve, transcribe, summarize clause-by-clause, or store proprietary text. Accreditation-body and CAP checklists that quote requirements are separately licensed material — do not paste them into shared repositories or prompts.

Current edition and the closed transition

• ISO 15189:2022 is Edition 4, published December 2022, cancelling and replacing ISO 15189:2012; catalogue metadata was read directly for this review.
• The 2022 edition aligns structurally with ISO/IEC 17025:2017 and incorporates point-of-care testing requirements previously held in ISO 22870. Do not cite ISO 22870:2016 as a current separate basis: the ISO catalogue lists it as withdrawn.
• The ILAC-agreed transition for accredited medical laboratories ran to December 2025. A 2012-based quality system is out of date, not "in transition" — do not build a gap baseline that assumes a future deadline.
• Record publisher, title, edition, amendments, authorized location, access date, source owner, currency-review date, impact decision, and approval in the controlled source ledger.

Keep four lanes separate

1. ISO 15189 accreditation

An accreditation body grants accreditation for a defined scope of examinations, per laboratory and per location, under ISO/IEC 17011. A medical laboratory is accredited, not "ISO 15189 certified." Since 2026-01-01 the recognition arrangement sits with Global Accreditation Cooperation Incorporated; verify current claim and logo wording with the accreditation body.

2. United States CLIA certification

CLIA covers US human-specimen testing for diagnosis, prevention, treatment, or health assessment. Applicable laboratories need the appropriate CLIA certificate or an applicable exemption. Under 42 CFR 493.3, research testing without patient-specific results for those clinical purposes is an explicit exception. This does not make every research-labelled study exempt: the authorized owner must evaluate the actual testing and reporting purpose.

ISO 15189 accreditation does not satisfy CLIA and cannot replace a CLIA-based accreditation. Deemed status flows only from a CMS-approved accreditation organization's program. CMS approves a limited set of accreditation organizations whose approved programs support the CLIA accreditation route; read the current AO list rather than relying on a remembered count. The CAP 15189 program is layered on top of CAP Laboratory Accreditation Program accreditation rather than offered as a standalone substitute. CAP's current program page also excludes POCT from the CAP 15189 program scope and keeps a quality-manual requirement. These are scheme-specific conditions; ISO 15189's broader POCT coverage does not override them.

Never let an ISO 15189 readiness output be read as CLIA compliance, deemed status, licensure, or an inspection result.

3. Other national licensure and inspection regimes

State licensure, national health-authority requirements, and payer conditions of participation are separate again, with their own inspection processes and their own records. Non-US jurisdictions may make ISO 15189 accreditation mandatory, voluntary, or irrelevant. This is an applicability decision for authorized humans.

4. IVD device regulation

The performance of an in vitro diagnostic device, and any laboratory-developed test regime that applies to it, is regulated separately from laboratory accreditation. EU IVDR conformity assessment, notified-body involvement, and performance-study requirements are not laboratory accreditation questions. See references/iso-13485.md and the EU entries in references/source-ledger.md.

Hard boundary

This skill and its files cannot:

• accredit a laboratory, issue or validate an accreditation certificate or schedule, or predict an assessment or inspection outcome;
• establish CLIA certification, deemed status, licensure, or personnel qualification;
• decide which scheme, jurisdiction requirement, or payer condition applies;
• replace the laboratory director, quality manager, authorized signatory, accreditation body, assessor, EQA provider, or competent authority;
• verify or validate an examination procedure, set biological reference intervals, establish traceability of assigned values, or judge clinical suitability; or
• infer competence or patient safety from a document title, keyword, template, checklist, or script result.

Use outputs as a list of evidence questions for accountable human review.

Scope of accreditation is per examination

Each scope item is defined by discipline, the examination or measurand reported, the controlled procedure and its issue, and the primary sample type with its acceptance requirements. Point-of-care testing performed under the laboratory's responsibility belongs in the scope discussion explicitly, including devices operated by clinical staff outside the laboratory.

PYTHONDONTWRITEBYTECODE=1 python3 scripts/validate_scope_intake.py \
  /path/to/medical-laboratory-scope-intake.json --standard iso-15189

Copy assets/templates/medical-laboratory-scope-intake-template.json outside the skill first. The distributed template fails closed by design.

Process and evidence domains

The iso-15189 profile carries these domain labels for manifests and gap reports. They are workflow topics, not clause references:

scope-and-impartiality, organizational-structure-and-governance, personnel-competence, facilities-and-safety, equipment-and-calibration, metrological-traceability, reagents-and-consumables, externally-provided-products-and-services, pre-examination-processes, examination-methods-verification-and-validation, measurement-uncertainty, validity-of-results-and-external-quality-assessment, point-of-care-testing, post-examination-and-reporting, laboratory-information-management, complaints, nonconformity-and-corrective-action, risk-management-and-improvement, internal-audit, management-review, continuity-and-emergency-preparedness.

Each domain needs an owner, status, evidence IDs, source/version reference, recorded approval, and links to open gaps. Sample records, not only procedures.

Where medical laboratory evidence differs from ISO/IEC 17025

Pre-examination processes carry disproportionate risk

Most avoidable patient harm originates before the analyser: request content and patient identification, collection and identification of the primary sample, transport and stability conditions, acceptance and rejection criteria, and handling of compromised samples. Sample: rejection records, identification-error events, transport excursions, and the resulting investigations — not only the collection manual.

Post-examination and reporting is clinical communication

Assemble evidence for result review and authorization, reference intervals and clinical decision limits with their basis, interpretive comments and who is authorized to make them, report content and amendment or retraction handling, and — the item most often thin — critical-result notification with documented read-back and timeliness. Turnaround-time monitoring belongs here too.

Point-of-care testing needs an explicit standard and scheme scope

ISO 15189:2022 covers POCT, but a chosen accreditation program may limit its offered scope (including CAP 15189, above). Record the applicable route and the actual scope schedule; do not infer POCT accreditation from the standard alone. Record governance of devices outside the laboratory, operator training and authorization, connectivity and result capture into the patient record, quality-control regimes, and reconciliation with central laboratory methods.

Verification is the normal case, validation the exception

Most medical laboratories verify commercial IVD examinations for their own setting rather than validating a new method. Record which performance characteristics were verified against the manufacturer's claims, the acceptance criteria, the data, and the authorized approval to report patient results. Laboratory-developed and modified procedures need the fuller validation evidence and the applicable regulatory analysis.

External quality assessment, not just proficiency testing

Record EQA enrolment per scope item, results, evaluation against criteria, and investigation of unsatisfactory performance. Where no EQA scheme exists for an examination, record the alternative comparison approach and its authorization. An unacceptable EQA outcome with no documented investigation is a blocker.

Metrological traceability of assigned values

For measurands where higher-order reference materials and reference measurement procedures exist, record the traceability of assigned values and the resulting commutability and comparability limitations. Where no reference system exists, record that fact and what the laboratory does about result comparability.

Risk and continuity are explicit

The 2022 edition treats risk to patients as a running requirement rather than an annex. Record identified risks, controls, residual acceptance with authority, and improvement actions. Continuity and emergency preparedness — instrument failure, LIS outage, reagent supply interruption, facility loss — needs tested arrangements, not a plan nobody has exercised.

Shared checks that apply here

• scripts/audit_document_records.py — controlled documents, records, retention basis, and external-source currency. Standard-agnostic.
• scripts/check_capa.py — nonconformity and corrective action with effectiveness evidence before closure.
• scripts/check_supplier_controls.py — reagents, consumables, calibration providers, and referral laboratories, including the referral laboratory's own accreditation or licensure status.
• scripts/validate_evidence_manifest.py and scripts/gap_analyzer.py with --standard iso-15189.

scripts/check_traceability.py and scripts/check_qmsr_transition.py are device-lifecycle checks and do not apply here.

Common preparation failures

• Presenting ISO 15189 readiness as CLIA compliance or deemed status.
• Saying "certified" when the laboratory is accredited.
• Citing ISO 22870 as the current separate POCT basis, or ISO 15189:2012 as current.
• POCT devices operating outside the laboratory with no governance, training, or QC evidence in the accreditation scope discussion.
• Critical-result notification procedures with no notification records or timeliness evidence.
• Reference intervals adopted from a package insert with no documented basis for the served population.
• EQA scores filed without investigation of unsatisfactory results.
• Continuity plans that have never been exercised.

Sources

• ISO 15189:2022 — catalogue entry
• ILAC: ISO 15189:2022 published
• CMS CLIA program
• CLIA accreditation and exemptions
• CMS approved accreditation organizations
• CAP 15189 program
• references/source-ledger.md — dated baseline and provenance limitations
• references/assurance-lanes.md — how accreditation, certification, and regulatory inspection differ