Field Force Effectiveness in Pharma When the Script Is Just the Beginning
Field force effectiveness in pharma is still measured the way it was measured when a rep could see most of the doctors on the list. Calls per day. Reach and frequency. Message delivery. Those measures made sense when access was the constraint and more activity meant more prescriptions. Access is no longer the constraint. Veeva's Pulse data had 45% of HCPs accessible to biopharma in 2024, down from 60% eighteen months earlier. The constraint now is what happens after the prescription, and almost no field model is built or measured for that. This post sets out a different definition of field effectiveness, the evidence behind it, and how to rebuild the field around it without blowing up the model you have.
The field is being judged on the wrong half of the job
Here is the arithmetic your field dashboard does not show. A 2026 JAMA study summarized by Johns Hopkins found that insurer rejections of brand name prescriptions rose from 24.3% of initial attempts in 2018 to 40.7% in 2024. Of the rejected scripts, 48.4% were never followed by a fill of that drug or any drug in its class within 90 days. IQVIA data reported by Managed Healthcare Executive found that 61% of prescriptions with a final cost above $250 are never picked up. In the American Medical Association's latest survey, 82% of physicians said prior authorization at least sometimes leads patients to abandon treatment.
Now put your best rep in that picture. She wins the prescribing decision. The script hits a prior authorization wall. The office staff give up after the second call. The patient never starts. On every field metric you track, that was a success. On the only metric that matters to the physician, the patient and your revenue, it was a loss. Multiply it across a territory and you have a field force that is effective at creating intent and blind to whether intent becomes treatment. We call the gap value leakage, and the field sits closer to it than any other function.
What effectiveness means when the script is just the beginning
A field force is effective when the physicians it serves get more of their patients onto appropriate therapy, faster, and keep them there. That definition changes three things at once.
It changes the rep's job. In a specialty category the physician already knows your efficacy story. What she does not know is which of her patients are stuck in your hub, which payer changed its policy last month, and who at your company can fix it. A rep who can answer those questions is worth a meeting. A rep who delivers the core message a fourth time is not, and the access numbers tell you how physicians are voting.
It changes what you measure. Script to start conversion by territory. Time to therapy. Where patients stall and how long they sit there. Persistence at 90 days. Barrier resolution rate and speed. These are progression measures, and they describe whether the field is converting the intent it creates. Activity measures describe effort. You can have excellent effort and a leaking funnel, and most companies do.
It changes what the field is for. Reps and MSLs encounter access barriers, pharmacy problems and support failures weeks before any dashboard registers them. Right now that signal mostly dies in a call note or a hallway complaint. Captured, classified and acted on, it is the earliest warning system your commercial organization has. The field is one of pharma's most underused intelligence systems, and treating it as a message delivery channel wastes it.
The evidence that experience moves prescribing
This is not a values argument. Bain's pharma practice found in 2018 that around 40% of a physician's drug recommendations relate to overall experience with the company rather than the product, and that physicians who rate a company highly are two to three times more likely to prescribe its products. McKinsey's launch research the same year found fully satisfied prescribers more than twice as likely to prescribe. The field delivers most of that experience. It is the human face of your company at the moment the physician decides whether to trust you with her patient.
The leaders have noticed. Lilly built LillyDirect to remove the burdens patients face in a complex system. Novartis launched a direct platform for Cosentyx because, as its US president put it, the company needs new ways to reach patients "by removing barriers in the system." Novo Nordisk's CEO told Fierce Pharma in January 2026 that the obesity category "acts a lot more as a consumer business than a traditional medication." When the people at the top of the industry describe the job as removing barriers and meeting consumer expectations, a field model that still rewards call volume is out of step with its own leadership.
How to rebuild the field without breaking it
You do not need a new CRM or a reorganization. You need four changes in how the field operates, in this order.
Start with one brand and one leak. Use the commercial data you already have to find where patients stall between script and first dose for a priority brand. That gives the field a specific problem rather than a general exhortation to be more customer centric.
Give the field a way to report what it sees. A rep who learns that a regional payer added a step edit needs somewhere to put that information where it will be classified, assigned to an owner, acted on and measured. Build that loop, even crudely, and run it for a quarter. You will learn more about your access problems than any market research study has told you. We described the operating version in our note on journey operations for field excellence.
Change the scorecard before you change the incentive. Add progression measures alongside activity measures for two quarters so the field can see the connection between what it does and whether patients start. Then move the incentive. Doing it in the other order produces resentment and gaming.
Make the standard explicit. Your physicians compare the experience of working with your company to the best service they got this week. That is the Consumer-Grade standard, and the field is where most of it is delivered. Recognition, anticipation, coherence, effort, resolution and visibility are six conditions you can audit a territory against. A physician who has to tell three people at your company the same patient story has an effort problem you can fix without a single new message.
Three questions for your next field review
- For your top brand, what share of prescriptions written in your best territories became treated patients last quarter, and how does that compare with your worst territories?
- When a rep learns about a new access barrier, where does that information go, and how long until something changes?
- If your most resourceful reps left tomorrow, would patient starts in their territories hold, or do they depend on favors no process replaces?
Field effectiveness used to mean getting in the door. Now it means getting the patient through the door the physician opened. The companies that measure the second thing will have the more valuable field force, whatever their call counts say.
About the author
Wayne Simmons is the founder of The Customer Excellence AGENCY and the author of The Customer Excellence Enterprise (Wiley, 2024). He is founding faculty of the MS in Customer Experience Management at Michigan State University's Broad College of Business. He led global customer excellence in Pfizer's first Chief Marketing Organization and in Bayer's Customer Powerhouse, where he optimized therapeutic area field forces. Related reading: What is value leakage in pharma? and What is Customer Excellence in pharma?







