| Spa Lifestyle Bulgaria | Bulgaria | Medical and health spas | Bulgaria |
| Spa Piešťany | Slovakia | Medical and health spas | Slovakia |
| Spa Resort Tree of Life | Czech Republic | Medical and health spas | Czech Republic |
| Spain Medical Services | Spain | | Spain |
| Spa-Med-Holiday | Guatemala | Cosmetic surgery, Dentistry, Hair transplantation, Obesity surgery, Surgery, Other services | Guatemala |
| Spa-Resorts.cz | | Medical and health spas | Czech Republic |
| Sparsh Hospital | India | Surgery | India |
| Specialist Dental Group | Singapore | Dentistry | Singapore |
| Specialty dental clinic for oral surgery & dental implant | Syria | Dentistry | Syria |
| Speed Jordan | Jordan | | Jordan |
| Sphera International | Brazil | Dentistry, Medical and health spas, Obesity surgery, Surgery | Brazil |
| Spine Center Mexico | Mexico | Other services | Mexico |
| Srdoci Clinic | Croatia | Dentistry | Croatia |
| sri siddhivinayak medical research | | Cancer treatment, Care of the elderly, CT and MRI scans, Infertility treatment, Medical and health spas, Surgery - Cosmetic and plastic, Surgery – Eye, Surgery – General, Surgery – Gynaecology,... | India |
| Sri Sri Ayurveda Panchakarma | India | Medical and health spas | India |
| Srushti Fertility Research Centre | | Dentistry, Surgery – Gynaecology, Surgery – Hip, Surgery - Knee, Surgery - Orthopaedic | India |
| St Philips Hospital | Malta | Surgery | Malta |
| St Raphael Private Hospital | Cyprus | Surgery | Cyprus |
| St. Luke's Medical Center | Phillipines | Cancer treatment, Care of the elderly, CT and MRI scans, Dentistry, Drug and alcohol rehab, Hair transplantation, Infertility treatment, Medical and health spas, Stem cell treatment, Surgery -... | Philippines |
| St. Peter and Paul's Private Hospital | Cyprus | Surgery | Cyprus |
| Stackpole & Associates, Inc. | USA | | United States of America |
| State of the Heart Cardiology | United States | CT and MRI scans | United States of America |
| Statmedica | Poland | Cosmetic surgery, Dentistry, Medical and health spas, Surgery | Poland |
| Stellart Centre for Assisted Reproduction | Czech Republic | Infertility treatment | Czech Republic |
| Steps-Health and Travel | Thailand | Cosmetic surgery, Surgery | Oman |
| Stic Care | India | Cosmetic surgery, Dentistry, Infertility treatment, Surgery | India |
| Stockholm Dental Clinic | Spain | Dentistry | Spain |
| Stomadenta | Turkey | Dentistry | Turkey |
| Stomatologia Steczko | Poland | Dentistry | Poland |
| Stomatološka poliklinika Jukica | Croatia | Dentistry | Croatia |
| Stomdas | Romania | Dentistry | Romania |
| Studio Dentistico Barchitta | Italy | Dentistry | Italy |
| Stunning Makeovers | Malaysia, Thailand | Cosmetic surgery, Dentistry | New Zealand |
| Sublimis | Argentina | Cosmetic surgery, Dentistry, Hair transplantation | Argentina |
| Successful Parents | Ukraine | Infertility treatment | Ukraine |
| Sujok Association of India | | | India |
| Sun Dental Clinic | Turkey | Dentistry | Turkey |
| Sun Dental Clinic Izmir-Turkey | Turkey | Dentistry | Turkey |
| Sun Medical Group Inc. | Malaysia, Thailand | Cosmetic surgery, Dentistry, Medical and health spas, Surgery | Canada |
| Sunflower Health Travel International | | | United States of America |
| Sunset - Breathing Space Thailand | Thailand | Drug and alcohol rehab | Thailand |
| Sunshine Medical Tourism LLC | Costa Rica, Panama, Israel, India | Dentistry, Obesity surgery, Other services | United States of America |
| Sunway Medical Centre | Malaysia | Cancer treatment, CT and MRI scans, Dentistry, Infertility treatment, Surgery - Cosmetic and plastic, Surgery – Eye, Surgery – General, Surgery – Gynaecology, Surgery – Heart, Surgery – Hip, Surgery ... | Malaysia |
| Superior A.R.T. | Thailand | Infertility treatment | Thailand |
| Superior Care | UK | Other services | United Kingdom |
| Sure Medical Tourism | Columbia | Cancer treatment, Dentistry, Infertility treatment, Medical and health spas, Surgery - Cosmetic and plastic, Surgery – Eye, Surgery – General, Surgery – Gynaecology, Surgery – Heart, Surgery – Hip,... | Colombia |
| SurGal Clinic | Czech Republic | Surgery - Cosmetic and plastic | Czech Republic |
| SurGal Clinic | Czech Republic | | Czech Republic |
| Surgeon and Safari | South Africa | | South Africa |
| Surgery Abroad International | Belgium, Croatia, Cyprus, Hungary, India, Greece, Poland, Czech Republic, Spain, Turkey | Dentistry | United Kingdom |
| Surgery Getaways | Thailand | Cosmetic surgery, Dentistry | Australia |
| Surgery Host (Servicio Medico de Tramites e Implantes S C) | Mexico | Cosmetic surgery | Mexico |
| Surgery in Greece | Greece | Cosmetic surgery, Dentistry | Greece |
| Surgery in Greece | Greece | Cosmetic surgery | Greece |
| Surgery in Malta | Malta | Cosmetic surgery, Dentistry, Surgery | United Kingdom |
| SurgeryDubai.com | United Arab Emirates | Cosmetic surgery | United Arab Emirates |
| SurgeryInFrance | France | Surgery | United Kingdom |
| SurgeryPlanet Inc | | | United States of America |
| Surgical Attractions | South Africa | Cosmetic surgery | South Africa |
| Surgical Bliss | South Africa | Cosmetic surgery, Dentistry, Surgery | South Africa |
| Surgical Experts International | Germany | Surgery | Germany |
| Surgical Rejuvenation Centre | South Africa | Cosmetic surgery, Surgery | South Africa |
| Surgical Services International | Venezuela | Cosmetic surgery, Dentistry, Surgery | Venezuela |
| Surgical Tourism Canada | Canada | Surgery | Canada |
| Surgical Trip LLC | Costa Rica, Germany, India, Israel, Jordan, Mexico, Singapore, South Korea, Taiwan, Thailand, Turkey and USA | Dentistry, Obesity surgery, Surgery, Other services | United States of America |
| Surgical Trip Services | Venezuela | Cosmetic surgery, Other services | Venezuela |
| Surgical Trip Services | Venezuela | Cosmetic surgery | Venezuela |
| Surgi-Care Health & Travel | Guatemala | Surgery, Other services | Guatemala |
| SURGI-CARE HEALTH TRAVEL | Guatemala | Cosmetic surgery, Surgery | Guatemala |
| SurgiGo | India | Surgery | United Kingdom |
| Surrogate motherhood center "La Vita Felice" | | | Ukraine |
| Sushrut Hospital | India | Surgery | India |
| Sushruta Hospital | India | Surgery | India |
| SV Plastic Surgery Center | | Surgery - Cosmetic and plastic | Lithuania |
| Sweetchild Group | Russia | Infertility treatment | Russia |
| Swiss Dentist Abroad Dental Implant Centre | Switzerland | Dentistry | Switzerland |
| Swiss Medica | Switzerland | | |
| Swissna Group AG | | Cancer treatment, CT and MRI scans, Dentistry, Drug and alcohol rehab, Hair transplantation, Infertility treatment, Medical and health spas, Surgery - Cosmetic and plastic, Surgery – Eye, Surgery –... | Switzerland |
| Swissna Group AG | | Cancer treatment, Care of the elderly, CT and MRI scans, Dentistry, Drug and alcohol rehab, Hair transplantation, Infertility treatment, Medical and health spas, Stem cell treatment, Surgery -... | Switzerland |
| Swixmed | Switzerland | Surgery | Switzerland |
| Symmetria | Greece | Cosmetic surgery | Greece |
