OK, assuming there's a company where the offer letter / contract says must be 9 to 6 at office.
But the department heads are setting some leeways like giving staffs coming in to work on rotation (not stipulated in the offer letter and when I asked HR, they said it's based on department head's policy).

Now my question is, will this arrangement affect any insurance or medical claims when it is needed? Let's say you injured yourself during duty time but it's not your rotation and you at home, can still claim insurance from the company? I heard macam cannot.

Hope got otais here to enlighten me. Thanks

For Medical and Insurance Claim for minor injury or emergency should be straight forward covered under company or from the Insurance Company your company bought from.

If you are looking for SOCSO claim especially cases like lost of ability to work claim, this will be hard as SOCSO need proof that you are working at that period of time during the injury happen which can be tricky.

Bro, medical/health insurance cover any medical care / emergency / outpatient visits regardless if it occur at workplace during work hours, or not. Only difference is, an employer would be more careful when dealing with workplace related injuries especially if during performing work tasks. One is due to the concern they might get lawsuits and have OSHA implications.