NHHC
| Acronym | Definition |
|---|---|
| NHHC | New Hampshire Humanities Council (Concord, NH) |
| NHHC | National Home Health Care Corp (Scarsdale, NY) |
| NHHC | New Hampshire Homeschooling Coalition (Concord, NH) |
| NHHC | National Harness Handicapping Championship (annual) |
| NHHC | North Houston Heart Center (Spring, TX) |
| NHHC | Nonketotic Hyperglycemic Hyperosmolar Coma |