Study Drug	First 10 Digits of GPIa	Drug Note Termsb
Dabigatran etexilate	83-33-70-30-20	dabigatran, dabigatran etexilate, pradaxa, dabigat, dabigatran etexilate mesylate
Warfarin	83-20-00-30-20	warfarin sodium, warfarin, coumadin, jantoven

^aGPI is a 14-digit drug classification system maintained by Medi-Span. The first 10 digits represent drug group-subclass-name-name extension. The remaining 4 digits represent dosage form-strength.

^bWhile GPI-10s were used to search the pharmacy claims database, the data source—hospital Charge Detail Masters—used for hospitalizations contains drug notes and not specific drug codes. Additional drug note terms were used (e.g., common misspellings).

GPI = Generic Product Identifier.