IVD and CLIA: Categorization, Waiver by Application and Lab Verification
FDA assigns each cleared or approved IVD a CLIA complexity: waived, moderate or high. A manufacturer can ask FDA to waive a moderate complexity test through a CLIA Waiver by Application, or seek 510(k) clearance and waiver together through a Dual 510(k) and CLIA Waiver submission. Labs using the test still must follow CLIA.
Last reviewed Oct 2026 · By Sound Lab Consultants CLIA team · General information, not legal advice.
How CLIA categorization works
FDA determines the CLIA complexity of commercially marketed IVD tests (FDA: CLIA categorizations). Categorizations are searchable in the FDA CLIA test database. CDC explains how complexity drives the CLIA requirements a lab must meet (CDC: CLIA test complexities).
Waived: simple tests with an insignificant risk of an erroneous result (42 CFR 493.15).
Moderate or high complexity: scored on criteria such as knowledge, training, reagent preparation, operational steps, calibration and QC, troubleshooting and interpretation.
CLIA Waiver by Application (CW)
FDA's guidance describes a CLIA Waiver by Application as a request that a previously cleared or approved test, initially categorized as moderate complexity, be categorized as waived because it meets the statutory waiver criteria (FDA guidance: CLIA waiver applications for IVD manufacturers). Studies should reflect the intended waived users and settings. FDA assigns a CW tracking number (FDA guidance: Administrative procedures for CLIA categorization).
Dual 510(k) and CLIA Waiver by Application
The Dual Submission pathway, set up under MDUFA III, lets a manufacturer seek 510(k) clearance and CLIA waiver in one submission. FDA's guidance says the pathway is optional and describes comparison and reproducibility studies with untrained, intended users that can support both (FDA guidance: Dual 510(k) and CLIA Waiver by Application studies (PDF)).
What this means for labs using the test
Check the complexity in the FDA database before choosing a certificate (CLIA certificate types).
Waived: a Certificate of Waiver and the manufacturer's instructions (Certificate of Waiver requirements).
Moderate or high complexity, unmodified: verify accuracy, precision, reportable range and reference intervals before patient testing (493.1253(b)(1)).
Modified: establish performance specifications (493.1253(b)(2)). Modifying a waived test can change its status.
Set up QC (CLIA quality control requirements), and consider an IQCP where eligible.
How we help
We help laboratories and IVD manufacturers understand CLIA requirements: complexity categories, what lab customers must do to verify a test, how waived-setting use is controlled, and what documentation labs need. We do not prepare or file FDA submissions.
Checklist
[ ] Look up the test's current complexity in the FDA CLIA database.
[ ] Confirm the lab's certificate covers that complexity.
[ ] Read the package insert for QC and limitations.
[ ] Verify unmodified nonwaived tests before patient reporting.
[ ] Treat any change to the manufacturer's instructions as a modification needing establishment of specifications.
[ ] Set QC frequency, or document an IQCP where eligible.
[ ] Enroll in PT for regulated analytes.
[ ] Train and assess competency for every operator.
[ ] Keep the package insert version matched to your procedure.
How Sound Lab Consultants helps
We are a CLIA, CAP and COLA laboratory compliance consultancy that works with labs nationwide. Depending on what you need, we can provide:
Lab setup planning, from CLIA application to first patient report (CLIA consulting).
laboratory director services and technical consultant support.
Ongoing compliance oversight: procedure manuals, QC review, PT tracking and competency assessment.
IQCP and QC program design (CLIA quality control requirements).
Method verification and validation guidance under 42 CFR 493.1253.
clinical lab billing support, coordinated with your compliance program.
Directors qualified for New York (NY CQ) work, where a New York permit applies (New York lab licensing).
Plans start from $500. Book a call and we will scope the work with you.
Frequently asked questions
Who decides if an IVD is CLIA waived?
FDA categorizes commercially marketed IVDs for CLIA complexity, including waiver determinations.
What is a CLIA Waiver by Application?
A request to FDA to categorize a previously cleared or approved moderate complexity test as waived, supported by data showing it meets the statutory waiver criteria.
What is a Dual 510(k) and CLIA Waiver submission?
An optional pathway, created under MDUFA III, for seeking 510(k) clearance and CLIA waiver in a single submission.
Does a waived test need verification?
CLIA does not require 493.1253 performance verification for waived tests, but the lab must hold a Certificate of Waiver and follow the manufacturer's instructions.
What happens if a lab modifies a cleared test?
The lab must establish its own performance specifications under 493.1253(b)(2), and a modified waived test is no longer treated as waived.
Do you file FDA submissions?
No. We help labs and manufacturers understand CLIA requirements and lab-side verification. Regulatory submissions to FDA are outside our scope.
Official sources
FDA guidance: CLIA waiver applications for IVD manufacturers
FDA guidance: Dual 510(k) and CLIA Waiver by Application studies (PDF)
FDA guidance: Administrative procedures for CLIA categorization
Related pages
Next step
Tell us what you test, where, and for whom, and we will map the certificate, accreditation and staffing path with you.
Sound Lab Consultants · PO Box 2135, Chandler, AZ 85244 · Serving laboratories nationwide.
General information, not legal or regulatory advice. Confirm current requirements with CMS, your state agency and your accreditor.