S: Sensory organs
| Level 2 code | Description |
|---|---|
| S01 | Ophthalmologicals |
| S02 | Otologicals |
| S03 | Ophthalmological and otological preparations |
February 8, 2026
| Level 2 code | Description |
|---|---|
| S01 | Ophthalmologicals |
| S02 | Otologicals |
| S03 | Ophthalmological and otological preparations |