What does CLIA categorize labs into, and what does that imply for the clinic's testing capabilities?

• A. Waived only.
• B. Waived, moderate complexity, and high complexity; most outpatient clinics operate under waived or moderate complexity with appropriate certifications.
• C. High complexity only.
• D. Moderate complexity only.

Answer: (B)

CLIA divides labs into three levels: waived, moderate complexity, and high complexity. This classification drives what kind of quality control, personnel qualifications, proficiency testing, and inspections a clinic must follow. Waived tests are the simplest and carry minimal risk when performed correctly, so many outpatient settings can use a straightforward setup with a Certificate of Waiver. Moderate complexity tests require more robust quality assurance, proper documentation, trained personnel, and participation in proficiency testing. High complexity testing demands even stricter standards, specialized staff, and extensive validation. Because many clinics handle routine, low-risk testing, they most often operate under the waived category or under moderate complexity with the appropriate certifications. This makes the statement that CLIA has three categories and that outpatient clinics commonly use waived or moderate complexity the best fit.