How often must medical exams or screenings be completed for OSHA’s medical surveillance requirements?

OSHA’s medical screening and surveillance requirements require employers to provide multiple types of medical examinations and screenings to their employees based on the potential workplace hazards. The frequency of these tests depends on the hazard level, exposure level, and the specific type of examination required. For instance, employees exposed to asbestos must have a medical examination every three years, while lead-exposed workers must have a blood test every two months.

Employers should refer to the regulation specific to the substance; however, medical screening is typically required in the following situations:

• Pre-employment for jobs involving exposure to hazardous substances (e.g., lead, asbestos, benzene);
• Periodically for employees working in environments with regulated toxins, excessive noise, or respiratory risks;
• Post-exposure following incidents involving bloodborne pathogens or chemical spills; and
• Job-specific risk assessments, such as for healthcare personnel, where screening helps identify infectious disease risks and immunity status.