Slide Presentation from the AHRQ 2007 Annual Conference

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