API is committed to maintaining our high level of customer service, while preserving the health and safety of our employees during the COVID-19 crisis. API is currently limiting on-site staffing and consequently, we are reducing our phone hours. Emails and our Live Chat feature will continue to be serviced as usual during regular business hours, and we encourage you to use these ways to contact us. In addition, the Knowledge Base section of our website provides answers to many frequently asked questions.

Thank you for your patience and understanding while we navigate these difficult times.

WELCOME to American Proficiency Institute

At American Proficiency Institute every aspect of your proficiency testing is controlled by you -- how you choose to receive your test kits, how you report results, and whether to review test results using traditional reports or using graphical analysis. Throughout the entire process, you have the backing of the most advanced proficiency testing organization in the world.

We are now accredited by A2LA to the international PT quality standard, ISO/IEC 17043:2010. Click the A2LA Accredited symbol above to access our scope of accreditation.



  • Apr 6
    Immunology Replacement Deadline
  • Apr 15
    Immunology PT Results Deadline
  • Apr 16
    Hematology Evaluations Graded
  • Apr 20
    Chemistry-Misc. Shipment
  • Apr 27
    Chemistry-Misc. Replacement Deadline
  • May 1
    Immunology Evaluations Graded