If the PLHCP discovers that the employee uses drugs, does the PLHCP have an obligation to tell the employer?

No. The PLHCP must maintain strict confidentiality on specific medical findings unrelated to the ability to wear a respirator. Information regarding pregnancy, genetic susceptibility, mental health problems, and drug use are not to be revealed to the employer hen they result from the medical evaluation process. These findings must remain confidential. How specific medical information is addressed between the employee and PLHCP should be determined by the legal, professional, and ethical standards that govern the PLHCP’s practice.