| ocd | 1 | 2 |
| oeffnungszeiten | 3 | 3 |
| offene | 2 | 4 |
| öffnungszeiten | 5 | 10 |
| ohrenfremdkoerper | 1 | 1 |
| ohrenfremdkörper | 1 | 1 |
| ohrenpolyp | 2 | 3 |
| öhrensteine | 1 | 1 |
| ohrpolyp | 1 | 2 |
| oktober | 19 | 36 |
| oliver | 1 | 1 |
| onychodystrophie | 1 | 2 |
| operation | 1 | 1 |
| org | 1 | 1 |
| organophosphat | 1 | 2 |
| organophosphat-kontamination | 1 | 1 |
| oriares | 1 | 1 |
| oronasale | 1 | 2 |
| örper | 1 | 1 |
| orpund | 3 | 3 |