CLIA Waiver vs. Moderate Complexity: Which Certificate Does Your Lab Need?

The Clinical Laboratory Improvement Amendments (CLIA) program, administered by the Centers for Medicare & Medicaid Services (CMS), requires every laboratory that tests human specimens to hold a CLIA certificate. Choosing the wrong certificate type — or performing tests beyond your certificate's scope — is one of the most common and costly compliance errors in clinical laboratory practice.

The Five CLIA Certificate Types

CMS issues five types of CLIA certificates:

What Is a CLIA Certificate of Waiver?

A Certificate of Waiver (CoW) authorizes your laboratory to perform only CLIA-waived tests — tests that FDA has determined are so simple and accurate that the risk of erroneous results is negligible. Examples include:

• Blood glucose (fingerstick glucometers)
• Urine pregnancy tests (dipstick)
• Urine dipstick urinalysis
• Fecal occult blood (guaiac-based)
• Influenza A/B rapid antigen tests
• COVID-19 rapid antigen tests
• Strep A rapid antigen tests
• HbA1c (point-of-care devices cleared for waiver)
Important: Even with a CoW, you must follow the manufacturer's instructions exactly. Any modification to a waived test — including using it for a specimen type not listed in the package insert — automatically elevates it to high-complexity status.

What Is Moderate Complexity?

Moderate complexity tests require more technical skill, quality control, and oversight than waived tests. Most laboratory tests performed in hospital outreach labs, independent reference labs, and physician office labs fall into the moderate complexity category. Examples include:

• Complete blood count (CBC) with automated differential
• Comprehensive metabolic panel (CMP)
• Lipid panel
• Thyroid function tests (TSH, free T4)
• Urinalysis with microscopy
• Urine culture (semi-quantitative)
• Most immunoassay-based tests

To perform moderate complexity tests, your laboratory must hold a Certificate of Compliance, Certificate of Accreditation, or Certificate of Registration — not a Certificate of Waiver.

The Consequences of Performing Tests Beyond Your Certificate

CMS takes certificate scope violations seriously. Consequences include:

• Immediate jeopardy citation — the most serious CMS finding, which can result in laboratory closure within 23 days
• Civil monetary penalties — up to $10,000 per day of violation
• Medicare/Medicaid exclusion — loss of billing privileges
• Referral to state health department — potential loss of state laboratory license

How to Upgrade Your CLIA Certificate

If your laboratory currently holds a Certificate of Waiver and wants to perform moderate complexity tests:

Complete CMS Form 116 (CLIA Application for Certification)

Select "Certificate of Compliance" or "Certificate of Accreditation"

Designate a qualified Laboratory Director (MD, DO, PhD, or CLIA-qualified scientist)

Implement a quality management system (QC, PT, competency assessment, document control)

Pay the applicable fee based on your test volume and specialty

The upgrade process typically takes 60–90 days. During this period, you may not perform moderate complexity tests.

CLIA and International Laboratories

CLIA applies only to laboratories testing specimens from US patients. However, international laboratories that export test results to the United States — or that seek CAP accreditation — must meet equivalent standards. The ISO 15189 standard is the international equivalent of CLIA moderate complexity requirements and is accepted by regulatory bodies in the EU, Canada, Australia, the UAE, and Saudi Arabia.

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LabComply's CLIA Compliance module tracks your certificate expiration, renewal deadlines, and test complexity classifications — so you never accidentally perform a test beyond your certificate scope.