Singapore medical complaint: should I complain to the hospital or SMC first?

MOH recommends first raising the concern with the healthcare provider or institution because some issues can be resolved there. If unresolved, the correct escalation depends on the issue: for example, professional conduct of a doctor can go to the Singapore Medical Council, while service, care-management or billing disputes may use other healthcare complaint or mediation routes. Official source: Ministry of Health. Guide: https://getinstantlaw.com/sg/topics/medical-negligence