Direct comparison
Laboratory Accreditation Bodies Compared
Who accredits medical laboratories: CAP, Joint Commission, COLA, ANAB (ISO 15189), AABB, and state/CMS survey compared for procurement and vendor evaluation.
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How do CAP, Joint Commission, COLA, ANAB (ISO 15189), AABB, State Agency / CMS Direct compare side by side?
The table below compares CAP, Joint Commission, COLA, ANAB (ISO 15189), AABB, State Agency / CMS Direct across 6 procurement-relevant dimensions, from what it accredits against through how to verify.
Side-by-side comparison
| Dimension | CAP | Joint Commission | COLA | ANAB (ISO 15189) | AABB | State Agency / CMS Direct |
|---|---|---|---|---|---|---|
| What it accredits against | CAP's own discipline-specific checklists | Joint Commission laboratory standards | COLA's own accreditation standards | ISO 15189 (international medical lab standard) | AABB Standards for blood banks/transfusion services | CLIA regulations (42 CFR 493) directly |
| Confers CLIA "deemed status" | Yes | Yes | Yes | Yes | Specific to blood bank/transfusion scope | N/A — this is the direct-survey pathway itself |
| Typical lab type | Hospital and large independent labs | Hospital labs, usually alongside hospital-wide survey | Physician-office labs, smaller independent labs | Any medical lab seeking ISO 15189 / international recognition | Blood banks, transfusion services, cellular therapy | Any lab that opts for (or is required into) direct survey |
| Inspection model | Peer inspection by practicing lab professionals | Joint Commission surveyors | COLA surveyors | ANAB assessors against ISO 15189 clauses | AABB assessors | State health agency surveyor; CMS validation survey oversight |
| International recognition | Primarily US-focused | Primarily US-focused | Primarily US-focused | ILAC MRA signatory — internationally recognized | Primarily US-focused, some international programs | US regulatory pathway only |
| How to verify | Accreditation status/checklist scope from CAP | Joint Commission accreditation verification | Accreditation status from COLA | ISO 15189 scope certificate from ANAB | Accreditation status from AABB | Current CLIA certificate from the lab / CMS |
Common questions
Common questions about CAP vs Joint Commission vs COLA vs ANAB (ISO 15189) vs AABB vs State Agency / CMS Direct
Who accredits medical laboratories in the United States?
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No single body does. CMS administers CLIA certification, the legal requirement every US medical laboratory must hold. Labs satisfy the CLIA survey requirement either through direct survey by their state health agency, or through accreditation by a CMS-recognized private accreditor — CAP, the Joint Commission, COLA, and ANAB (via ISO 15189) are the main ones for general clinical laboratory work, with AABB covering blood banking and transfusion services specifically.
Is CLIA certification the same as CAP or COLA accreditation?
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No. CLIA certification is the underlying federal requirement administered by CMS. CAP and COLA accreditation are two of several ways a lab can satisfy the inspection component of that requirement ("deemed status") instead of being surveyed directly by its state agency. A lab needs a CLIA certificate regardless of which, if any, private accreditor it uses.
Does ISO 15189 accreditation satisfy CLIA requirements?
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Yes — a US clinical laboratory can reach CLIA deemed status through ISO 15189 accreditation from ANAB, as an alternative to CAP, Joint Commission, or COLA accreditation. ISO 15189 additionally carries international recognition through ANAB's ILAC MRA signatory status, which the other US-focused accreditors do not provide.
How do I verify a reference laboratory's accreditation before contracting with them?
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Confirm both currency and scope: check directly with the named accreditor (CAP, Joint Commission, COLA, ANAB, or AABB) that the accreditation is active rather than relying on a vendor's own claim, and request the specific accredited scope (test menu or checklist areas) for the work you're contracting, since accreditation is granted by scope rather than as a blanket institutional credential.
