Official CMS lookup tool
QCOR CLIA lookup
QCOR stands for Quality, Certification and Oversight Reports, and as of 2026-07-20its CLIA Laboratory Lookup at qcor.cms.gov is the free official CMS tool that returns an active laboratory's CLIA number, facility name and address, where the testing is performed, the certificate type, and the date the certificate expires. Use QCOR for the current record; use SourceCheckHealth for imported CMS identity fields, source freshness, and the exclusion screening around the lab.
What QCOR is
CMS reporting site
Quality, Certification and Oversight Reports — the official CMS home of the CLIA Laboratory Lookup.
Lookup scope
Active labs, weekly
CMS says the CLIA list is updated weekly and represents the information in the system at the time of update.
Certificate printing
No CMS fee
Labs with a paper or electronic certificate issued since September 26, 2023 can print it from QCOR.
Official lookup path
How to use the CMS QCOR CLIA laboratory lookup
- 1. Open QCOR and choose the CLIA laboratory lookup. CMS directs laboratory demographics users to QCOR, where the CLIA Laboratory Lookup is selected from the site menu.
- 2. Search by CLIA number, or by name plus location.The 10-character CLIA number is the cleanest key. CMS says that if you lack the identification number you can type the facility's legal name alongside its state and city.
- 3. Match the facility before reading the fields. Confirm the facility name and the address where testing is performed, then read the certificate type and the certificate expiration date on the matched record.
- 4. Record what you saw and when. Capture the CLIA number, certificate type, expiration date, and the date you performed the check, since the QCOR list refreshes weekly.
Scope limit
A lab missing from QCOR is not a finding
The public QCOR CLIA search covers active CLIA laboratories, and CMS says the list is updated weekly and represents the information in the system at the time of update. A laboratory that does not appear may be newly certified, recently changed, or simply not yet reflected in that week's file. Treat a blank result as “not found in this snapshot,” not as evidence of a certification problem, and direct certificate-status questions to the applicable State Agency or Accreditation Organization.
Field provenance
What QCOR returns versus what is imported here
QCOR is a live official directory; SourceCheckHealth holds a point-in-time import of the CMS Provider of Services clinical-laboratory file. This table keeps the two apart so an imported row is never read as a current certificate verification.
| Search field or output | CMS QCOR | SourceCheckHealth |
|---|---|---|
| 10-character CLIA number | Primary search key for a single active laboratory | Opens the imported CMS POS row at /labs/<CLIA number> |
| Facility legal name with state and city | CMS says to use this when you do not have the identification number | Not a supported lookup key on this site |
| Certificate type | Returned for the listed active laboratory | Shown only when present in the imported source row |
| Certificate expiration date | Published for the listed certificate | Not a dedicated imported field |
| Freshness signal | CMS says the list is updated weekly | Local import timestamp and source status page |
Certificates
QCOR is also where a lab prints its CLIA certificate
CMS no longer mails CLIA certificates or paper fee coupons. Laboratories that have received a paper or electronic CLIA certificate since September 26, 2023 can print their own certificate from the QCOR Clinical Laboratory Lookup Tool, and CMS charges no fee for printing it. Eligible laboratories must keep a valid email address on file to receive the electronic certificate. A certificate copy supplied by a facility is not a substitute for reading the current QCOR record yourself.
Where this fits
QCOR verifies the lab; it does not screen the people
QCOR answers whether a laboratory holds a listed active CLIA certificate and when it expires. It does not report HHS OIG LEIE exclusions for the owners, directors, or staff attached to that lab. Run the exclusion check separately, then keep both records together in the review trail.
Continue verification
Related CLIA guidance
For the expiration-date field specifically, use the dedicated expiration-date guide; for the certificate-type field, use the Certificate of Waiver guide.
date_retrieved: 2026-07-20. Sources checked: CMS QCOR CLIA Laboratory Lookup, the CMS Laboratory Demographics Lookup and Registry page, the CMS CLIA program pages, and the CMS Provider of Services clinical-laboratory dataset. SourceCheckHealth does not provide CLIA certification, licensure verification, complete credentialing, or a final compliance decision.
Reviewed by SourceCheck Health
Last reviewed: 2026-07-20. date_retrieved: 2026-07-20.
The QCOR tool description, CLIA laboratory lookup fields, active-laboratory scope, weekly update cadence, and certificate-printing guidance on this page are reviewed against the official CMS QCOR and CMS CLIA sources named here before the public guidance is updated.
FAQ
Practical notes
What is CMS QCOR?
QCOR stands for Quality, Certification and Oversight Reports. It is the free CMS reporting site at qcor.cms.gov, and its CLIA Laboratory Lookup is the official public tool for looking up a certified clinical laboratory's CLIA record. There is no CMS fee to use it.
What does the QCOR CLIA laboratory lookup show?
CMS says the lookup provides demographic information about laboratories, including the CLIA number, the facility name and address, where the laboratory testing is performed, the type of CLIA certificate, and the date the certificate expires.
How do I search QCOR if I do not have the CLIA number?
CMS says that if you lack the 10-character identification number you can type the facility's legal name together with its state and city. Match the facility name and address on the result before reading the certificate fields, because similar legal names are common across locations.
Does a lab missing from QCOR mean it is not CLIA certified?
No. The QCOR CLIA search covers active CLIA laboratories, and CMS says the list is updated weekly and represents the information in the system at the time of update. An absent or not-yet-updated record is not evidence of a certification problem — direct certificate-status questions to the applicable State Agency or Accreditation Organization.
Can a laboratory print its own CLIA certificate from QCOR?
CMS no longer mails paper CLIA certificates or fee coupons. Laboratories that have received a paper or electronic CLIA certificate since September 26, 2023 can print their certificate from the QCOR Clinical Laboratory Lookup Tool at no CMS fee, and eligible labs must keep a valid email address on file.