| CAM | Complementary and alternative medicine |
| COMT | Catechol-o-methyl-transferase |
| HIRA | Health Insurance Review and Assessment Service |
| ICD-10 | International Classification of Diseases, 10th revision |
| KM | Korean medicine |
| KPPS | King’s Parkinson’s disease Pain Scale |
| NHI | National Health Insurance |
| NPS | National Patient Sample |
| PD | Parkinson’s disease |
| UPDRS | Unified Parkinson’s Disease Rating Scale |
| WM | Western medicine |