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RxNorm drug products (not mutually exclusive) with similar VHA Drug Class assignments
| Mapping type | % of RxNorm drugs with similar VHA Drug Class assignment (n=18228) |
| Direct-Map vs Drug-Level-Map | 44% (8001) |
| Drug-Level-Map vs Ingredient-Level-Map | 24% (4379) |
| Direct-Map vs Ingredient-Level-Map | 25% (4473) |
