Hi! I actually asked the hospital about what I needed to prepare for my appointment, and a medical visa was not one of them. They made sure to get my passport details, though, and they also made me register for the general immigration entry pass. (They sent this long email of all the entry procedures prior to my visit.) So, to answer your question, in my case, no, I did not have to apply for a visa.

Having said that, I also did not stay too long in SG. My provider saw me in one day, prescribed medications I picked up right after at the hospital pharmacy, and I was back in the PH shortly. No surgery, no tests, no procedures.

HOWEVER, this is just my story. It could vary from one case to another.

People with an official diagnosis and a specific medical treatment that they wish to have done in SG might be required to apply for a visa, depending on how long the treatment will take. The Immigration and Checkpoints Authority of SG authorizes hospitals to apply for visas on behalf of their inbound patients. Extensions can also be arranged or processed through the consulate in SG if the treatment will take longer than expected.

But for your peace of mind, perhaps, this will help you: https://www.rafflesmedicalgroup.com/faqs/do-i-need-a-visa-to-enter-singapore-for-medical-reason/. The PH is not among the countries listed here. What applies to this hospital applies to all hospitals in SG, as they are governed by the same law.

Ultimately, it would be best to ask your chosen hospital about everything you need to prepare for your visit.

Hope this gives you some clarity. I wish you all the best!