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Slide Presentation from the AHRQ 2007 Annual Conference

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RxNorm Lab Evaluation

Completeness
- 19,824 non-device new prescriptions & renewal requests
  - 195 (0.98%) no matching SCD found;
    - 94% multi-vitamins, bowel preps, drugs packaged in a drug delivery device
  - 18,733 (94.5%) matched by 3 of 3
Mismatches
- 1003 of 19450 with 2+ SCD matches (6.2%)
- Root causes:
  - RxNorm errors
    - Synonymy already corrected as of Jan, 2007 (20%)
    - Previously unrecognized synonymy (30%)
  - Source errors
    - Bad NDC-to-SCD mappings used by one of the matchers

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