Drug Trend Reports: Quick Summary Of Big Three PBMs

“Comparative” is a very loose word to use here since each PBM has a slightly different approach to their analysis.

But, while it’s truly impossible to compare apples to apples and I will continue to argue that trend may be an irrelevant metric, I know may consultants and others are focused on these metrics.

With that in mind, I pulled the trend numbers (overall and specialty) along with the generic fill rate from the Express Scripts, CVS Caremark, and Prime Therapeutics trend reports.


Overall Rx Trend

Specialty Trend


CVS Caremark




Express Scripts




Prime Therapeutics





  • I used the CVS Caremark health plan overall and specialty trend data which I thought would be most comparable to Prime’s data.
  • Express Scripts reports their overall trend (without specialty) being 0.1%.
  • CVS Caremark provides a break out of trend along with best practices by sector (see below).


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