| HKAFO | hip, knee, ankle, and foot orthosis |
|---|---|
| HKAO | hip-knee-ankle orthosis |
| HO | hand orthosis; heterotopic ossification; high oxygen; hip orthosis; history of; Holt-Oram [syndrome]... |
| HOA | hip osteoarthritis; hypertrophic osteoarthropathy |
| SONH | spontaneous osteonecrosis of the hip |