| Iakentro | Greece | Infertility treatment | Greece |
| Iandroms | Spain | Surgery | Spain |
| Iasis Hospital | Cyprus | Infertility treatment | Cyprus |
| IASO General Hospital | Greece | CT and MRI scans, Surgery, Other services | Greece |
| Iaso General Hospital | Greece | | Greece |
| i-Care Medicare | France | Surgery | United Kingdom |
| ICO, Oftalmologia | Spain | Surgery – Eye | Spain |
| Ideal Fertility Center | India | Infertility treatment | India |
| IECEP | France | | |
| IIMA (Israel International Medical Agency) | | | Israel |
| Ilter Clinic | Sweden | Hair transplantation | Sweden |
| Imagen Dental | Mexico | Dentistry | Mexico |
| Imagine Healthcare | France, Norway, Spain, Turkey | Cosmetic surgery, Dentistry, Hair transplantation, Infertility treatment, Surgery | United Kingdom |
| IMOI | Spain | Dentistry | Spain |
| IMOR Foundation | Spain | Other services | Spain |
| Imperial Dent Romania | Romania | Dentistry | Romania |
| Implant Abroad | Hungary | Dentistry | Hungary |
| Incidental Tourist | | Dentistry | Canada |
| Incosol | Spain | Medical and health spas | Spain |
| Index Medica | Poland | Dentistry | Poland |
| Index Medica UK | Poland | Dentistry | Poland |
| India Heals | India | Dentistry, Surgery | India |
| India Health Tour | India | Cosmetic surgery, Infertility treatment | India |
| India Health Visit | India | Cosmetic surgery, Dentistry | India |
| India4Health | India | Cosmetic surgery, Dentistry | India |
| India-America Global Solutions | India | Surgery | United States of America |
| Indian Health Guru | India | Dentistry | India |
| Indian Health Tourism | | Cancer treatment, CT and MRI scans, Dentistry, Hair transplantation, Infertility treatment, Medical and health spas, Stem cell treatment, Surgery - Cosmetic and plastic, Surgery – Eye, Surgery –... | India |
| Indian Health Tours | India | 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 -... | India |
| Indian Med Guru | India | Infertility treatment | India |
| Indian Medical Holiday | India | 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 -... | India |
| Indicure | India | Cosmetic surgery, Dentistry | India |
| Indicure | India | | |
| Indraprastha Apollo Hospitals | India | | India |
| IndUShealth | | Surgery | United States of America |
| Infertility treatment | | Infertility treatment | Spain |
| InLife | Austria | Cancer treatment, Surgery - Cosmetic and plastic, Surgery - Orthopaedic | Austria |
| Innova Global Healthcare Services | United States | Surgery, Other services | United States of America |
| Innovative Dental Care | Hungary | Dentistry | Hungary |
| Institut Arthur Verne | France | Surgery | France |
| Institut Gustave Roussy | France | Other services | France |
| Institut Gustave-Roussy | France | Surgery | France |
| Institut Jantung Negara | Malaysia | CT and MRI scans, Surgery – Heart | Malaysia |
| Institut Marques | Spain | Infertility treatment | Spain |
| Institute for Reproductive Medicine | Austria | Infertility treatment | Austria |
| Institute for Reproductive Medicine & Endocrinolog | Austria | Infertility treatment | Austria |
| Institute Igalo | | | Croatia |
| Institute of Mother and Child | Czech Republic | Infertility treatment | Czech Republic |
| Instituto Bariatrico Dr. Betances | Dominican Republic | | Dominican Republic |
| Instituto Cefer | Spain | Infertility treatment | |
| Instituto de Fertilidad: infertility treatment in Palma de Mallorca, Balearic Islands, Spain | Spain | Infertility treatment | Spain |
| Instituto de Oftalmología Avanzada | Spain | Surgery – Eye | Spain |
| Instituto Madrileño de Fertilidad | Spain | Infertility treatment | Spain |
| Instituto Oftalmológico Fernández-Vega | Spain | Surgery – Eye | Spain |
| InsureandAway | | | United Kingdom |
| INTEGRA MEDICAL CENTER | Mexico | Surgery | Mexico |
| Inter Med Health Services | | Other services | United Arab Emirates |
| International BMT | Turkey, Germany, USA | | Turkey |
| International Dental and Medical centre | Spain | Dentistry | Spain |
| International Dental Centre - Kochi | India | Dentistry | India |
| International Fertility Centre | India | Infertility treatment | India |
| International Health Care | Belgium | Obesity surgery | Denmark |
| International Healthcare By Design | Canada | | Canada |
| International Medical Getaways | Thailand | Cosmetic surgery, Dentistry | Thailand |
| International Medical Getaways | Thailand | Cosmetic surgery, Dentistry, Surgery | Thailand |
| International Medical Getaways | Thailand | Cosmetic surgery, Dentistry, Surgery | Thailand |
| International Medical Treatment | Turkey | Surgery - Obesity | Turkey |
| International Medical Treatment | Turkey | Surgery - Orthopaedic | Turkey |
| International Medical Treatment | Turkey | Surgery - Cosmetic and plastic | Turkey |
| International Medical Treatment | Turkey | Cancer treatment | Turkey |
| International Medical Treatment | Turkey | Infertility treatment | Turkey |
| International Medical Treatment | Turkey | Stem cell treatment | Turkey |
| International Society of Travel Medicine | International | | United States of America |
| International Stem Cell Treatment Group | El Salvador and Argentina | Stem cell treatment | Argentina |
| International Surgery Center | Venezuela | Cosmetic surgery | Venezuela |
| International Triage, LLC | Argentina, Chile, Colombia, Costa-Rica, Dominican Republic, Mexico, Panama, USA | Dentistry, Infertility treatment, Surgery, Other services | United States of America |
| International Vision Centers | Netherlands | Other services | Netherlands |
| IOANNIS KIAMOS | | Dentistry | Greece |
| Iowemed | Romania | | South Africa |
| IPICK Health Care | | 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 -... | Turkey |
| IQ MEDICA | Poland | Dentistry | Poland |
| IREMA -Instituto de Reproduccion de la Marina Alta | Spain | Infertility treatment | Spain |
| Iscare IVF | Czech Republic | Infertility treatment | Czech Republic |
| ISIDA | Ukraine | Infertility treatment | Ukraine |
| ISIK EYE CARE Center | Turkey | Surgery | Turkey |
| ISIS Clinic | Cyprus | Infertility treatment | Cyprus |
| Island Hospital | Malaysia | Cancer treatment, CT and MRI scans, Infertility treatment, Stem cell treatment, Surgery – Eye, Surgery – General, Surgery – Gynaecology, Surgery – Heart, Surgery – Hip, Surgery - Knee, Surgery -... | Malaysia |
| Istanbul Dental Clinic | Turkey | Dentistry | Turkey |
| Istanbul Fertility and Women’s Health Center | Turkey | Infertility treatment | Turkey |
| Istanbul Implant Centre | Turkey | Dentistry | Turkey |
| Istanbul Memorial Healthcare Group | Turkey | Surgery | Turkey |
| Istarske Toplice | | Medical and health spas | Croatia |
| Istishari Hospital | Jordan | Infertility treatment, Surgery, Other services | Jordan |
| Iswarya Fertility Centre | India | Infertility treatment | India |
| IVF & Genetics Greece | Greece | Infertility treatment | Greece |
| IVF India | India | Infertility treatment | India |
| IVF Spain Alicante | Spain | Infertility treatment | Spain |
| IVF Treatment Abroad | Greece | Infertility treatment | Greece |
| IVF Treatment Abroad | Spain | Infertility treatment | Spain |
| IvfCancun-Irega | | Infertility treatment | Mexico |
