Table 3. Codes that could not be found in the OMOP concept dictionary.
| Code Type | Name | Code | ~# pts |
|---|---|---|---|
| RxNorm | Benzocaine/menthol | 466426 | 50,000 |
| CPT | (retired) Antibody, non-RBC, quantitative, first antigen | 86008 | 2,000 |
| RxNorm | Citric acid/simethicone/sodium bicarbonate | 689842 | 2,000 |
| RxNorm | Acetaminophen/diphenhydramine/pseudoephedrine | 689786 | 1,000 |
| CPT | Abdominal pain, unspecified site | 78900 | 1,000 |
| CPT | Individual medical psychotherapy by a physician… | 90841–90844 | 500 |
| CPT | Hepatitis C antibody | 86302 | 200 |
| RxNorm | Fentanyl citrate, 0.05 mg/ml injectable solution | 856409 | 100 |
| CPT | (retired) ADP Titration Platelet Aggregation Study | 85575 | 100 |
| CPT | (retired) Kidney function study including pharmacologic intervention | 78726 | 100 |
Approximate term frequency in ARCH is shown to the right, as a measure of the data loss caused by the missing code.