PROFICIENCY TESTING
ALL facilities had to be enrolled in an approved program as of January 1994. The test challenges are sent 3 times per year. Each regulated test has 5 challenges.
Enforcement and sanctions will be imposed as of 1995 on previously unregulated laboratories. Once again,
states with state licensure may be restricted to specific proficiency testing programs.
NOTE ☞: Information on PT companies can be found in the quality control chapter, information on proficiency
testing rules can be found in the quality assessment plan.