| Name | College | Chapter | Registered Specialty | |
|---|---|---|---|---|
| Singh Kuldip | College of Obstetricians and Gynaecologists | Obstetrics & Gynaecology | ||
| Singh, Kulgit | College of Anaesthesiologists | Chapter of Intensivists | Anaesthesiology, Intensive Care Medicine | |
| Singh, Baldev | College of Dental Surgeons | Chapter of Oral & Maxillofacial Surgeons | Oral & Maxillofacial Surgery | |
| Singhal Shweta | College of Ophthalmologists | Ophthalmology | ||
| Sinniah R | Chapter of Pathologists | Pathology | ||
| Siow Boon Leng | College of Physicians | Chapter of Geriatricians | Geriatric Medicine | |
| Siow Shu Fen Dawn | College of Dental Surgeons | Chapter of Periodontists | Periodontics | |
| Siow Hua Chiang Charles | College of Physicians | Chapter of Neurologists, Chapter of Pain Medicine Physicians | Neurology | |
| Siow Woei Yun | College of Surgeons | Chapter of Urologists | Urology | |
| Siow Yew Ming Anthony | College of Obstetricians and Gynaecologists | Obstetrics & Gynaecology | ||
| Sir James Fraser | ||||
| Sirisena Udawattage Dinesh Chaminda | Section of Sports Physicians | Sports Medicine | ||
| Renita Sirisena | College of Surgeons | Chapter of Hand Surgeons | Hand Surgery | |
| Antonio B Sison | ||||
| Sitaram, K Raman | College of Anaesthesiologists | Anaesthesiology | ||
| Siti Zawiah Omar | ||||
| Sitoh Yih Yian | College of Radiologists | Chapter of Diagnostic Radiologists | Diagnostic Radiology | |
| Sitoh Yih Yiow | College of Physicians | Chapter of Geriatricians, Chapter of Sleep Medicine Physicians | Geriatric Medicine | |
| Sittampalam Kesavan | Chapter of Pathologists | Pathology | ||
| Sittampalam, Krishnamoorthy | College of Surgeons | Chapter of Orthopaedic Surgeons | Orthopaedic Surgery | |
| Siu Wing Yin Vivian | College of Emergency Physicians | Section of Geriatric Emergency Medicine | Emergency Medicine | |
| Sivananthan Sivahami Saraswathi | College of Obstetricians and Gynaecologists | Obstetrics & Gynaecology | ||
| Sivaraman Pary | College of Physicians | Chapter of Renal Physicians | Renal Medicine | |
| Sivasakthi Velayuthapillai | ||||
| Sivasubramanian Harish | College of Surgeons | Chapter of Orthopaedic Surgeons | Orthopaedic Surgery |