Could having fewer pharmacies in a network improve adherence?
Yes. A new study by the CVS Health Research Institute,1 involving more than 200,000 people, showed that over a 12-month period, people who were in narrow pharmacy networks were actually MORE adherent.
Researchers evaluated participants’ adherence by looking at their Medication Possession Ratio (MPR). MPR compares the number of days of medication that an individual has against the number of days they’re supposed to be on therapy.

MPR Improvement of People Taking:

How does a narrow network support adherence?

Other studies have shown that when a plan has a narrow network, fewer members use multiple pharmacies to fill their prescriptions.2
That can mean easier refills and better clinical oversight—factors which could contribute to improved adherence and more successful therapy.
Many plans have determined that narrow networks can provide both savings and great pharmacy access.
of commercial plans use narrow network drug plans3
of commercial Exchange members are in a narrow network drug plan4
of Medicare Part D members are in preferred network drug plans4

Today, when it’s imperative to reduce costs and improve quality, narrow networks provide an opportunity to do both.