What drives the surveillance interval
Interval depends on the hazard profile in your HIRARC / chemical register, noise exposure, previous abnormal results, and what your Occupational Health Doctor documents as the next review date. A general GP checkup is not the same as statutory OHD surveillance.
Compare: /compare/ohd-vs-gp-checkup-employer · money page: /services/occupational-health-ohd-johor.
When-need FAQ: /faq/when-need-ohd-doctor-johor.