CAP Accreditation vs COLA vs Joint Commission
For the lab director or office manager deciding who will inspect a lab under a Certificate of Accreditation. We read Subpart E of 42 CFR 493, CMS's list of approved accreditors and specialty matrix, CMS's Federal Register approval notice for each organization, and each accreditor's own pages. No fees and no scores: the verdict is by lab type.
The verdict by lab type
Best fit for physician office labs
Physician offices head COLA's list of settings, a surveyor or team sized to the lab visits, and Technical Advisors answer compliance questions between surveys.
Best fit for hospital labs
A hospital already under Joint Commission keeps its lab with the same accreditor, which has surveyed hospital lab services since 1979 and gives full lab surveys 14 days' notice.
Best fit for reference and high-complexity labs
College of American Pathologists (CAP)
CAP inspects with practicing peers, offers specialty inspectors for high-complexity disciplines and writes 21 discipline-specific checklists.
Point by point, with the evidence
Each row is something a lab asks before choosing, with the CLIA section it touches. A filled well means a CMS document or the accreditor's own process page says so; a ring means the accreditor says so in its marketing; a blank well means we found nothing either way, not that the answer is no.
- verified against a document
- stated by the accreditor
- not stated
Scroll sideways for more accreditors
| Requirement | 1College of American Pathologists (CAP) | 2COLA | 3The Joint Commission |
|---|---|---|---|
| AHolds CMS deeming authority, so its accredited labs are deemed to meet CLIA§ 493.551 | College of American Pathologists (CAP): verified against a document | COLA: verified against a document | The Joint Commission: verified against a document |
| BApproved for all 24 CLIA specialties and subspecialties§ 493.557(a)(1) | College of American Pathologists (CAP): verified against a document | COLA: verified against a document | The Joint Commission: verified against a document |
| CInspects each lab on site every two years§ 493.555(b) | College of American Pathologists (CAP): verified against a document | COLA: verified against a document | The Joint Commission: verified against a document |
| DInspection teams drawn from practicing laboratory professionals (peer model)§ 493.557(a)(3) | College of American Pathologists (CAP): verified against a document | COLA: not stated | The Joint Commission: not stated |
| EHands the lab its checklist or standards manual before the visit | College of American Pathologists (CAP): verified against a document | COLA: stated by the accreditor | The Joint Commission: stated by the accreditor |
| FPublishes the notice a lab gets before a routine survey | College of American Pathologists (CAP): verified against a document | COLA: not stated | The Joint Commission: verified against a document |
| GRequires a self-inspection between on-site visits | College of American Pathologists (CAP): verified against a document | COLA: not stated | The Joint Commission: not stated |
| HAsks more of waived testing than CLIA does§ 493.15(e) | College of American Pathologists (CAP): verified against a document | COLA: verified against a document | The Joint Commission: verified against a document |
| IRequires proficiency testing for tests CLIA waives§ 493.801 | College of American Pathologists (CAP): verified against a document | COLA: not stated | The Joint Commission: not stated |
Side by side, in their own words
The wells above say whether a document backs each point. This table says what the documents actually say, so you can see how the three differ on the day an inspector walks in (more on what to expect at a CLIA or CAP inspection). Lines from CMS come from its approval notices for each organization.
Scroll sideways for all three accreditors
| Point | CAP | COLA | The Joint Commission |
|---|---|---|---|
| ACMS approval now running | Re-approved for all specialties from 27 March 2021 to 26 March 2027.86 FR 16371 | Re-approved 6 March 2024 to 6 March 2030; cytogenetics and radiobioassay added from 20 January 2026, histocompatibility from 10 July 2026.91 FR 35217 | Re-approved for all specialties from 24 May 2024 to 24 May 2030.89 FR 45900 |
| BRoutine cycle | Biennial on-site inspection, plus a required mid-cycle self-inspection.CMS notice, 2021 | Biennial on-site inspection; COLA calls it a two-year cycle with an optional self-assessment before the survey.CMS notice, 2024 | A survey 24 months after the previous full survey for labs; lab accreditation runs a two-year cycle.Joint Commission process |
| CWho inspects | Peer teams led by a pathologist or laboratory director: trained, practicing laboratory professionals qualified through a CAP inspector training program.CAP peer inspections | COLA's own surveyors, described as medical laboratory scientists with over 10 years of bench experience.COLA | Specially trained Joint Commission staff; a typical lab in a medium-sized acute care hospital gets one surveyor.Joint Commission |
| DNotice before a routine visit | US labs in CAP's Laboratory Accreditation Program get two weeks' notice from the team leader, and routine inspections fall in the 90 days before the two-year anniversary date.Guide to CAP Accreditation | Not stated by COLA. CMS records that COLA inspects unannounced when a complaint suggests problems with a serious or immediate impact on patient care.CMS notice, 2024 | All full laboratory surveys receive a 14-day notice.Joint Commission process |
| EChecklists and standards | 21 discipline-specific checklists, updated yearly; accredited labs reach them in e-LAB Solutions Suite, other labs may buy them, and each lab gets a checklist cut to its test menu before inspection.CAP checklists | On enrollment, instructions to download the COLA Accreditation Manual and an information packet; COLAcentral portal for status.COLA | Accredited organizations get complimentary access to E-dition, the electronic standards manual, in Joint Commission Connect.Joint Commission |
| FBeyond CLIA on waived tests | PT for waived test systems; waived testing follows the nonwaived rules for procedures, specimens, reporting and instruments; annual competency for waived testers.CMS notice, 2021 | The director reviews waived-test QC monthly; competency is assessed and documented for waived testers; PT for waived tests is encouraged.CMS notice, 2024 | Defined QC checks, QC and test records, trained staff and current procedures for waived testing; control procedures for all waived tests.CMS notice, 2024 |
| GHow fees are quoted | A fee estimate form. CAP waives the application fee if you buy the checklists and apply within 6 months.CAP | By phone with COLA's accreditation sales team; no amounts on the page.COLA | Calculated from the services provided and your average daily census.Joint Commission |
| HLabs holding its accreditation | 6,966 labs (CMS count, September 2026).CMS statistics | 5,639 labs (CMS count, September 2026).CMS statistics | 2,336 labs (CMS count, September 2026).CMS statistics |
Accreditor by accreditor
College of American Pathologists (CAP)Column 1
What it is
The pathologists' society's Laboratory Accreditation Program. CAP inspects with teams of practicing laboratory professionals trained through its own inspector program, against 21 discipline-specific checklists it updates every year.
Who it fits
Reference, hospital and specialty labs running high-complexity work: CAP says only it offers specialty inspectors for key high-complexity disciplines, and CMS notes separate CAP checklists for molecular pathology, flow cytometry and biochemical genetics.
What CMS and the accreditor document
AHolds CMS deeming authority, so its accredited labs are deemed to meet CLIA
§ 493.551 verified, source
BApproved for all 24 CLIA specialties and subspecialties
§ 493.557(a)(1) verified, source
CInspects each lab on site every two years
§ 493.555(b) verified, source
DInspection teams drawn from practicing laboratory professionals (peer model)
§ 493.557(a)(3) verified, source
EHands the lab its checklist or standards manual before the visit
verified, source
FPublishes the notice a lab gets before a routine survey
verified, source
GRequires a self-inspection between on-site visits
verified, source
HAsks more of waived testing than CLIA does
§ 493.15(e) verified, source
IRequires proficiency testing for tests CLIA waives
§ 493.801 verified, source
COLAColumn 2
What it is
A physician-directed, nonprofit accreditor that inspects with its own surveyors, whom it describes as medical laboratory scientists with over 10 years of bench experience, and backs them with Technical Advisors through the two-year cycle.
Who it fits
Physician office labs, clinics, rural health clinics and other small sites that want a survey framed as education and someone to call between visits. Physician offices head the list of settings COLA says it accredits.
What CMS and the accreditor document
AHolds CMS deeming authority, so its accredited labs are deemed to meet CLIA
§ 493.551 verified, source
BApproved for all 24 CLIA specialties and subspecialties
§ 493.557(a)(1) verified, source
CInspects each lab on site every two years
§ 493.555(b) verified, source
DInspection teams drawn from practicing laboratory professionals (peer model)
§ 493.557(a)(3) not stated; check with the accreditor
EHands the lab its checklist or standards manual before the visit
stated, accreditor page; check with the accreditor
FPublishes the notice a lab gets before a routine survey
not stated; check with the accreditor
GRequires a self-inspection between on-site visits
not stated; check with the accreditor
HAsks more of waived testing than CLIA does
§ 493.15(e) verified, source
IRequires proficiency testing for tests CLIA waives
§ 493.801 not stated; check with the accreditor
The Joint CommissionColumn 3
What it is
The hospital accreditor's Laboratory Services program, accrediting hospital lab services since 1979 and freestanding labs since 1995. Its own staff surveyors inspect, and a typical lab survey in a medium-sized acute care hospital involves one surveyor.
Who it fits
Labs inside a hospital or health system that already holds Joint Commission accreditation, so the lab and the building answer to one accreditor. A lab must hold a non-waived CLIA certificate to apply.
What CMS and the accreditor document
AHolds CMS deeming authority, so its accredited labs are deemed to meet CLIA
§ 493.551 verified, source
BApproved for all 24 CLIA specialties and subspecialties
§ 493.557(a)(1) verified, source
CInspects each lab on site every two years
§ 493.555(b) verified, source
DInspection teams drawn from practicing laboratory professionals (peer model)
§ 493.557(a)(3) not stated; check with the accreditor
EHands the lab its checklist or standards manual before the visit
stated, accreditor page; check with the accreditor
FPublishes the notice a lab gets before a routine survey
verified, source
GRequires a self-inspection between on-site visits
not stated; check with the accreditor
HAsks more of waived testing than CLIA does
§ 493.15(e) verified, source
IRequires proficiency testing for tests CLIA waives
§ 493.801 not stated; check with the accreditor
How deemed status works under Subpart E
15,214
labs hold a Certificate of Compliance and get state or CMS surveys instead
A lab that runs moderate or high complexity tests is surveyed one of two ways. With a Certificate of Compliance, the State Agency or CMS inspects. With a Certificate of Accreditation, a private accreditor approved by CMS inspects instead (§ 493.5(c)). Under § 493.551(a), CMS may deem an accredited lab to meet all applicable CLIA requirements when the accreditor's requirements are equal to, or more stringent than, the CLIA condition-level requirements. That grant is what people mean by deemed status.
Deemed status is not a pass on the rest of CLIA. Section 493.551(b) still has the lab obtain its certificate of accreditation, pay CMS's fees, meet the proficiency testing rules, let its PT program send results to its accreditor, and let the accreditor report unsuccessful PT and its follow-up action to CMS. You apply to CMS on Form CMS-116 (how to fill out Form CMS-116) even though the accreditor does the inspecting, and CMS says you also need to apply for a CoA through CMS. Until CMS receives proof of accreditation, you hold a Registration Certificate.
CMS keeps checking the accreditors through their labs. It may run a validation inspection on a representative sample of accredited labs or after a substantial allegation of noncompliance (§ 493.563), and a complaint inspection at any time during your hours of operation (§ 493.1780). A condition-level finding sends the lab to a full CMS review. Each accreditor's own approval lasts a term not to exceed 6 years (§ 493.559), and CMS publishes each approval in the Federal Register with a summary of how it judged the program, which is where several lines of this comparison come from.
On money, an accredited lab pays CMS a certificate fee plus a validation fee that covers 5 percent of the same costs CMS incurs inspecting nonaccredited labs of the same schedule (§ 493.645(a)(1)), shown in CMS's fee schedule (the CLIA fee calculator finds your band). The accreditor's own fees come on top, and CMS does not set them. We quote none here: ask each organization for a written estimate for your test menu.
If an accreditor withdraws or revokes your accreditation
The lab keeps its certificate of accreditation for 45 days after it receives notice of the withdrawal or revocation, or until the effective date of any CMS action, whichever is earlier (§ 493.551(c)). Plan a move to another accreditor, or to a Certificate of Compliance, inside that window.
Takeaway
Choosing by lab type
Physician office labs
Most office labs never meet an accreditor: they hold a Certificate of Waiver (check which CLIA certificate you need). The choice arrives with the first moderate complexity analyzer. CMS's September 2026 counts show 9,104 physician office labs on a Certificate of Compliance and 4,257 on a Certificate of Accreditation, so staying with state surveys is a common, legitimate answer. If you do accredit, COLA is built around this setting: it lists physician offices first, sizes the survey team to the lab, and keeps Technical Advisors on call through the two-year cycle.
One thing to price in: every accreditor here asks more of waived tests than CLIA does. Under COLA the director reviews waived-test QC monthly and competency is documented for waived testers (CMS notice), so the dipsticks and rapid strep kits in the same room join the inspection. Our competency assessment software comparison covers the tools that keep those sign-offs in one place.
Hospital labs
If the hospital already holds Joint Commission accreditation, the lab can sit in the same program: Joint Commission has accredited hospital laboratory services since 1979, uses staff surveyors, and gives every full laboratory survey 14 days' notice. CAP is the other route: it says it retains deemed status with The Joint Commission, so a CAP-accredited lab can sit inside a Joint Commission hospital. Ask both how a lab finding is shared with the hospital survey before you decide.
Reference, specialty and high-complexity labs
CAP's case is depth: teams of practicing laboratory professionals, specialty inspectors for high-complexity disciplines, and 21 discipline-specific checklists, with CMS noting separate checklists for molecular pathology, flow cytometry and clinical biochemical genetics (CMS notice). Specialty scope no longer separates the three: COLA added clinical cytogenetics and radiobioassay from 20 January 2026 and histocompatibility from 10 July 2026, and CMS's September 2026 matrix shows CAP, COLA and The Joint Commission across all 24 specialties and subspecialties. The difference is who inspects you and how, not what they may accredit.
Whoever inspects, the records they read live in your systems. Our LIS comparison for small labs, lab QC software comparison and inspection-readiness software comparison check those products against the 42 CFR 493 sections that every accreditor's standards must meet or exceed.
Takeaway
The other four CMS-approved accreditors
CMS lists seven organizations with deeming authority, not three. The other four matter when your work is specialized: AABB's scope is built around the blood bank, ASHI's around histocompatibility testing, and ACHC and A2LA hold approval across all 24 specialties. The table follows CMS's list of approved accreditation organizations (v. 8.8.2025), with scope from its September 2026 specialty matrix. All seven, with their approval terms, are on our official list of CMS-approved accreditation organizations.
| Organization | CLIA specialties CMS approves it for | Labs, CMS count |
|---|---|---|
| AAABBAssociation for the Advancement of Blood & Biotherapies | 14 of 24: bacteriology, mycology, parasitology, virology, general immunology, syphilis serology, routine chemistry, toxicology, hematology, and all five immunohematology subspecialties (ABO & Rh group, antibody detection for transfusion and nontransfusion, antibody identification, compatibility testing). | 192 |
| BA2LAAmerican Association for Laboratory Accreditation | All 24. | 8 |
| CACHCAccreditation Commission for Health Care, Inc | All 24. | 149 |
| DASHIAmerican Society for Histocompatibility and Immunogenetics | 4 of 24: histocompatibility (transplant and nontransplant), general immunology, ABO & Rh group. | 107 |
Lab counts: CMS laboratory statistics, September 2026, non-exempt labs. Source
How this comparison was made
We read 42 CFR 493 Subpart E and § 493.1780 on eCFR; CMS's approved-accreditor list (v. 8.8.2025), specialty matrix (September 2026), laboratory statistics (September 2026) and CLIA brochures; CMS's Federal Register approval notices for CAP (2021), COLA (2024, 2025, 2026) and The Joint Commission (2024); the accreditation pages of COLA and The Joint Commission; and CAP's accreditation pages, Guide to CAP Accreditation (November 2025) and 2025 checklist summary, last on .
A filled well means we verified the claim against a document we could read and link: the accreditor's own documentation or a regulator's record. An open ring means the accreditor says so in its own material, but we found no document to check it against. A blank well means we found nothing either way, which does not prove the product lacks it.
Verdicts are editorial: no organization can buy a verdict position or displace another. This page carries no prices and no ratings; ask each accreditor for its current fees and terms before you commit.
We re-read CAP's own pages on cap.org on 23 October 2026. A line backed by a CAP document, such as its accreditation guide or checklist summary, is marked verified; a line from CAP's program pages alone is marked stated. Accreditor fees are left out on purpose: none was published on the pages we read.
Questions labs ask
Does CLIA require CAP accreditation?
No. A lab doing nonwaived testing may hold a Certificate of Compliance and be surveyed by the State Agency or CMS, or a Certificate of Accreditation from any of the seven CMS-approved accreditors (§ 493.5(c)). If a contract or a payer asks for a named accreditor, that requirement comes from the contract, not from CLIA. The full path is in how to get a CLIA certificate.
Can a waived-only lab be accredited?
A Certificate of Accreditation is for labs doing nonwaived testing: CMS says labs doing nonwaived moderate and high complexity tests get CoAs (MLN006270). The Joint Commission, for one, requires a non-waived CLIA certificate before a lab may apply.
Does accreditation stop state surveys?
Routine ones, generally yes. CMS's approval notices say accredited labs generally will not be subject to routine state survey agency inspections, but remain subject to validation and complaint surveys by CMS or its agents, at any time during hours of operation (§ 493.1780).
How often do CAP, COLA and The Joint Commission inspect?
Every two years for all three. CMS describes CAP and COLA inspections as biennial (CAP notice, COLA notice); The Joint Commission surveys labs 24 months after the previous full survey and gives full laboratory surveys a 14-day notice. CAP gives US labs two weeks' notice from the inspection team leader (Guide to CAP Accreditation) and also requires a self-inspection mid-cycle.
Do accredited labs still enroll in proficiency testing?
Yes. Section 493.551(b) keeps the PT rules of Subpart H and has the lab authorize its PT program to send results to its accreditor. CMS notes CAP goes further and requires PT for test systems CLIA waives (CMS notice). Choosing a PT program: CAP vs API proficiency testing.
What does accreditation cost?
Two bills. CMS charges the certificate fee plus a validation fee for accredited labs (§ 493.645, CMS fee schedule); the accreditor charges its own fees on top. We quote no accreditor fee: CAP uses a fee estimate form, The Joint Commission prices on services and average daily census, and COLA quotes by phone.
Who checks the accreditors?
CMS. It runs validation inspections of accredited labs to test each accreditor's process (§ 493.563), and each approval runs for a term not to exceed 6 years (§ 493.559); CMS's MLN booklet says each organization must reapply every 6 years, or more often if necessary.