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Requirements for medical monitoring

Under medical monitoring, workers exposed to certain occupational hazards must go for regular medical examinations.

What is medical monitoring

If your workers are exposed to occupational hazards, you are required to send them for specific medical examinations.

These medical examinations aren’t general checkups. They are specific tests for the type of hazard involved.

The tests allow early detection of occupational disease and ensure that workers remain fit for such work. They also help you gauge whether existing control measures are effective.

Relevant regulations: Workplace Safety and Health (Medical Examinations) Regulations

Who is covered

Your workers are required to undergo regular medical examinations if they are exposed to any of these occupational hazards:

  • Arsenic or any of its compounds
  • Asbestos
  • Benzene
  • Bitumen
  • Cadmium or any of its compounds
  • Compressed air environment
  • Creosote
  • Excessive noise
  • Lead or any of its compounds
  • Manganese or any of its compounds
  • Mercury or any of its compounds
  • Organophosphates
  • Perchloroethylene
  • Pitch
  • Raw cotton
  • Silica
  • Tar
  • Trichloroethylene
  • Vinyl chloride monomer

Who can conduct examinations

You need to send your workers to approved doctors for their medical examinations:

  • Medical examinations must be conducted by a designated workplace doctor.
  • For noise hazards, hearing tests must be conducted by audiometric technicians trained in audiometric screening.
  • For chemical hazards, toxicological laboratories should have a quality assurance scheme for the test being done.

How often are examinations required

The tests and their frequency depend on the hazard involved:

  • Generally, a worker needs to go for an examination within 3 months of starting work.
  • After that, the worker has to undergo regular medical examinations once a year.
    • For workers exposed to lead or organophosphates, the frequency is once in 6 months.
    • For workers exposed to asbestos or silica, the frequency is once every 3 years.

For details on the frequency and types of tests, refer to the Schedule of the Workplace Safety and Health (Medical Examinations) Regulations.


Under certain circumstances, you may be able to apply for an exemption from medical monitoring.

Required reports

Your company will need to submit the following reports for medical monitoring: