By Giorgio Vescera, Vice President of Underwriting and Analytics at Navion
Most PBM contracts are won on the pricing grid. That makes sense. For brokers and employer groups, the rates are often the easiest part to compare. One proposal shows a stronger discount. Another shows a better rebate guarantee. A third appears to offer lower fees.
But in pharmacy benefit management, the numbers on the first read rarely tell the full story.
The real economics of a PBM contract often live in the language around the rates: the definitions, exclusions, audit rights, rebate terms and flexibility provisions that determine whether the pricing you were promised actually shows up in the plan’s results. PBM contracts are designed to look competitive on the surface. They’re also designed to protect the PBM’s economics underneath. Knowing the difference is where strong contract review begins.
The Definitions Section Is Where the Review Should Start
Brand. Generic. Specialty. Rebate. These terms may sound obvious, but the way a PBM defines them can materially change how a contract performs. A drug’s classification affects which guarantee applies, how spend is measured and whether the plan receives the economics it expected. Definitions are also where a lot of the pricing optics get created—favorable-looking guarantees that don’t reflect the group’s actual pharmacy spend.
Guarantees Can Be Structured to Obscure Underperformance
A PBM contract can include strong-looking guarantees and still leave meaningful dollars outside the measurement. Specialty drug lists, limited distribution drugs and other financial exclusions can reduce the pool of claims being measured—sometimes significantly. And if the contract allows performance to be offset across categories, underperformance in one area can quietly disappear behind results in another. Two proposals that look similar on the pricing grid may offer very different levels of protection once the contract language is examined.
Rebate Pass-Through and Specialty Flexibility Deserve Specific Attention
On rebates, the key question isn’t how much the PBM is projecting. It’s what the contract actually requires them to pass through, when reconciliation happens and how minimum guarantees are satisfied. On specialty, the question is whether the plan retains the flexibility to use manufacturer assistance programs, carve-out solutions or other high-cost management tools. Some contracts restrict that flexibility in ways that seem minor during procurement and become significant when specialty spend rises.
Audit Rights and Data Access Are Only Valuable If They’re Defined
A contract without meaningful audit rights asks the plan sponsor to rely on trust over verification. Strong audit language defines how often audits can occur, when they can be conducted and who is permitted to perform them. The same applies to data access. Timely, ongoing claims reporting isn’t just a transparency preference. It’s how plan sponsors hold PBMs accountable between renewals.
The PBM Contract Question Every Broker Should Ask
When a PBM proposal looks competitive, the most important question is simple: What’s behind the numbers? The pricing grid matters. But the definitions, financial exclusions, rebate terms, audit rights, offsetting restrictions and flexibility provisions determine how the contract actually performs.
For brokers and plan sponsors, the goal is straightforward: make sure the economics on paper hold up once the contract is active. The groups that get more value from their pharmacy benefit are usually the ones that know where to look before the contract is signed.
