A medical evaluation is an element of the written respiratory protection program that is required by the Occupational Safety and Health Administration (OSHA) (29 CFR 1910.134). The standard requires that if you are required to wear a respirator due to a potential hazard in your work environment, you must be fit tested, trained, and medically evaluated prior to having a respirator issued.
Respiratory protection program. This paragraph requires the employer to develop and implement a written respiratory protection program with required worksite-specific procedures and elements for required respirator use. The program must be administered by a suitably trained program administrator. In addition, certain program elements may be required for voluntary use to prevent potential hazards associated with the use of the respirator.
In any workplace where respirators are necessary to protect the health of the employee or whenever respirators are required by the employer, the employer shall establish and implement a written respiratory protection program with worksite-specific procedures. The program shall be updated as necessary to reflect those changes in workplace conditions that affect respirator use. The employer shall include in the program the following provisions of this section, as applicable
Medical evaluations of employees required to use respirators;
Fit testing procedures for tight-fitting respirators