| Acronym | Definition |
|---|
| IACH | Irwin Army Community Hospital (US Army; Fort Riley, Kansas) |
| IACH | Ireland Army Community Hospital (US Army; Fort Knox, KY) |
| IACH | Institute of Analytical Chemistry (Czech Republic) |
| IACH | International Association of Counseling Hypnotherapists |
| IACH | Interagency Council on Homelessness |
| IACH | International Association of Clinical Hypnotherapy |
| IACH | Indo-American Cultural Heritage |
| IACH | Israeli Association for Classical Homeopathy (Jerusalem, Israel) |
| IACH | International Academy for Classical Homeopathy |
| IACH | International Automated Clearing House (banking) |
| IACH | Integrated Approaches to Child Health |
| IACH | Institute of Advanced Crystal Healers |
| IACH | International Association for Colon Hydrotherapy |
| IACH | International Alliance of Certified Hypnotists |
| IACH | Inter-American Coal Holding NV (Aruba) |
| IACH | Iowa Chapter |
| IACH | Interagency Council for the Homeless |