CLIA Cheat Sheet 2026

The 30 highest-yield CLIA facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. Which factor MOST significantly affects the quality of technical outcomes in CLIA practice? → The practitioner's training, preparation, and attention to detail
2. Under CLIA, when must a laboratory re-validate a test method? → When there is a significant change in reagents, equipment, or methodology
3. What does calibration of laboratory equipment ensure? → Accurate and reliable equipment performance
4. What must a laboratory do when it receives its PT results from the provider? → Review results, investigate any failures, and document corrective actions
5. A laboratory discovers that it failed a proficiency testing event. Under CLIA, what is the required initial response? → Perform an investigation and take corrective action, documenting the findings
6. What is the consequence of intentional referral of proficiency testing samples to another laboratory under CLIA? → Suspension or revocation of the CLIA certificate and civil monetary penalties
7. Who is responsible for ensuring regulatory compliance in a lab? → Management and staff
8. Which documentation practice BEST demonstrates regulatory compliance for CLIA certified professionals? → Maintaining organized, dated, and signed records of all activities
9. Which personal protective equipment (PPE) principle applies to ALL CLIA certified professionals regardless of their specific role? → PPE must be properly fitted, maintained, and replaced as needed
10. Why is documentation important in laboratory quality systems? → To provide traceability and support audits
11. What role does calibration play in maintaining technical accuracy for Clinical Laboratory Improvement Amendments Certification professionals? → It ensures instruments produce accurate, consistent results over time
12. In CLIA practice, what happens when regulations are updated? → Professionals must update knowledge and practices to meet new requirements
13. Under CLIA, who may serve as general supervisor for a high-complexity testing laboratory? → A person with an associate degree and 2 years of high-complexity testing experience
14. Under CLIA, the general supervisor for high-complexity testing must be on-site or available during which hours? → All hours testing is performed
15. CMS uses a scoring system based on how many criteria to categorize laboratory tests as waived, moderate-, or high-complexity? → Seven
16. The Westgard 1₃s rule is violated when: → One control value exceeds ±3 SD
17. Under CLIA, when must a laboratory notify CMS of a change in laboratory director? → Within 30 days of the change
18. Under CLIA, which type of microscopy procedures qualify for a Certificate for Provider-Performed Microscopy (PPM)? → Wet mounts, KOH preparations, and fern tests performed during the patient visit
19. In Clinical Laboratory Improvement Amendments Certification, what is the PRIMARY purpose of conducting regular safety drills and exercises? → To ensure personnel can respond effectively in emergencies
20. Laboratories holding only a Certificate of Waiver are subject to which type of CMS inspection? → Complaint inspections only
21. When assessment results for a Clinical Laboratory Improvement Amendments Certification evaluation are inconclusive, the BEST practice is to: → Conduct additional assessment using alternative methods
22. How should Clinical Laboratory Improvement Amendments Certification professionals handle procedures that have been updated or revised? → Review updates, complete required training, and implement revised procedures
23. What is the purpose of Personal Protective Equipment (PPE)? → To protect from hazards
24. When documenting assessment findings in CLIA practice, which approach is MOST appropriate? → Record objective findings, measurements, and observations factually
25. Which personal protective equipment (PPE) principle applies to ALL CLIA certified professionals regardless of their specific role? → PPE must be properly fitted, maintained, and replaced as needed
26. What is the PRIMARY reason for regulatory compliance in the Clinical Laboratory Improvement Amendments Certification profession? → To protect public safety, ensure quality, and maintain professional integrity
27. What is an 'unsuccessful' PT performance under CLIA for an analyte over a testing period? → Failing two of three consecutive testing events for the same analyte
28. What is the primary goal of safety management in clinical labs? → To protect staff, patients & environment
29. When verifying the reference interval for a non-waived quantitative test, CLIA guidelines suggest using a minimum of how many healthy reference subjects? → 20
30. A laboratory performing moderate- or high-complexity testing that is inspected directly by CMS or a state agency holds which certificate? → Certificate of Compliance