| OD | Doctor of Optometry; obtained absorbance; occipital dysplasia; occupational dermatitis; occupational... |
|---|---|
| OE | on examination; order entry [system]; orofacial cleft; orthopedic examination; otitis externa; out-s... |
| OH | hydroxycorticosteroid; obstructive hypopnea; occipital horn; occupational health; occupational histo... |
| OHCA | out-of-hospital cardiac arrest |
| OOB | out of bed |