Yes, you need to undergo a medical examination in one of the GCC Accredited Clinic in the Philippines.

If youre going back here via an accredited agency they should have informed you with this, but if youre direct hire from one of the companies here in Qatar and there's no agency from the Philippines, you still need to have a medical there in the Philippines as medical results is a requisite for VISA Stamping at the Qatar Embassy in the Philippines.

Goodluck Kabayan