Short answer: FDA clearance or approval applies to the test system/device; CLIA certification applies to the laboratory that performs testing. A kit can be processed in a CLIA-certified lab without being FDA-cleared as a finished consumer diagnostic — especially when offered as a laboratory-developed test (LDT).
Confusing these labels is the most common regulatory misunderstanding in at-home testing marketing.
What FDA Clearance/Approval Covers
When FDA reviews an in vitro diagnostic, it evaluates aspects of analytic and clinical validity of that test system before marketing (for tests that undergo premarket review).[1] Instant self-tests you buy over the counter generally need an FDA pathway appropriate for home use. Absence of FDA clearance is not automatically "illegal," but it changes what claims are evidence-backed.
What CLIA Certification Covers
CLIA certifies laboratories that test human specimens and sets quality standards based on test complexity.[2][3] Saying a lab is CLIA-certified means the facility meets those laboratory standards — not that every consumer claim on a website was FDA-reviewed.
Laboratory-Developed Tests (LDTs)
CMS describes an LDT as an IVD designed, manufactured, and used within a single laboratory. FDA has generally exercised enforcement discretion for many LDTs historically, so many have not undergone FDA premarket review even while the performing lab is CLIA-certified for high-complexity testing.[1] ACS notes that some multi-cancer detection tests are available as LDTs under CLIA without FDA approval.[4]
Consumer translation: "Processed in a CLIA lab" ≠ "FDA-cleared home test." Ask which label applies to the specific product you are buying.
Bottom Line
Read both badges separately. Prefer companies that state clearly whether the assay is FDA-authorized for home use or is an LDT run in a named CLIA lab — and what that means for clinical claims.
Sources
- CLIA Overview — LDTs and CLIA FAQs — Centers for Medicare & Medicaid Services cms.gov
- Test Complexities — Centers for Disease Control and Prevention cdc.gov
- How to Obtain a CLIA Certificate — Centers for Medicare & Medicaid Services cms.gov
- Multi-cancer Detection (MCD) Tests — American Cancer Society cancer.org
Frequently Asked Questions
Can a test be sold without FDA clearance if a CLIA lab runs it?
Yes — many LDTs have historically been offered under CLIA without FDA premarket review, subject to evolving policy and the LDT definition.[1]
Is CLIA "better" than FDA or vice versa?
They answer different questions. CLIA: laboratory quality. FDA premarket review: validity of the test system when that review applies.[1]
Why do MCED ads say CLIA but not FDA-approved?
Because some are offered as LDTs. ACS states MCD tests are not FDA-approved even when available via CLIA.[4]