What is a transparent PBM?
Pharmacy benefits are one of the least understood line items in any health plan — by design. Here's how the money actually moves, and what changes when it moves in the open.
What a PBM actually does
A pharmacy benefit manager sits between your health plan, pharmacies, and drug manufacturers. It builds the network of pharmacies your members can use, decides which drugs are covered (the formulary), processes every claim at the pharmacy counter in real time, and negotiates rebates with drug manufacturers.
Every prescription your plan pays for flows through the PBM. That position — between everyone, touching every dollar — is enormously useful when it's working for you. It's enormously expensive when it isn't.
For a self-funded employer, this matters more than for anyone else: you're not paying premiums to an insurer who absorbs drug costs — you're paying the claims with your own money.
How traditional PBMs get paid without sending you a bill
The largest PBMs earn billions beyond their stated fees. The revenue hides in the gap between what you can see and what you'd need to see.
Spread pricing
The PBM bills your plan one price for a prescription and pays the pharmacy a lower one, keeping the difference. The spread never appears on an invoice — it exists only in the gap between two numbers you're rarely allowed to compare.
Retained rebates
Manufacturers pay rebates on brand drugs — often hundreds of dollars per script. Traditional contracts let the PBM keep a share, or redefine what counts as a "rebate" so entire categories of manufacturer money fall outside what's shared with you.
Fees you can't audit
Administrative fees charged to manufacturers, clawbacks from pharmacies, "program" fees — layered revenue that never touches your invoice. Contracts often limit audit rights precisely enough that you can't total it up.
None of this is illegal, and none of it is unusual — it's the standard business model. General education, not legal advice; see what to watch for in any PBM contract.
What "transparent, full pass-through" actually means
Not a marketing adjective — a different business model, checkable point by point.
You pay what the pharmacy is paid
Claims are billed to your plan at the exact amount the pharmacy receives. No spread, structurally — the two numbers are the same number.
100% of rebates pass through
Every dollar of manufacturer money attributable to your claims goes back to your plan, with script-level detail so you can see which prescriptions earned it.
One disclosed fee
The PBM earns a stated administrative fee — visible on every invoice — instead of a percentage of hidden gaps. When the PBM's revenue is fixed and disclosed, its incentives stop fighting yours.
Audit rights with teeth
Contractual, full-access annual audits — your auditor, your claims data, the PBM's actual pharmacy remittances. Transparency you can't verify is just a nicer brochure.
Transparency stopped being optional
Under the Consolidated Appropriations Act, plan sponsors have a fiduciary duty to prudently manage plan costs — which is difficult to demonstrate for a contract whose economics you cannot see. Employers have already faced lawsuits from their own employees over pharmacy overspending.
Meanwhile the FTC has been investigating large PBMs' pricing practices, and dozens of states have passed PBM reform laws targeting spread pricing and rebate retention specifically. The direction of travel is one way.
Getting ahead of it is straightforward: know what you pay, know where it goes, and be able to prove both. That's the entire idea of a transparent PBM.
Five questions that separate transparent from traditional
Including us. A PBM with pass-through economics will answer all five in writing without flinching.
- Will you bill my plan exactly what the pharmacy is paid, on every claim? If the answer involves the word "effectively," that's a no.
- Do 100% of rebates and manufacturer payments attributable to my claims come back to my plan? Ask how "rebate" is defined in the contract — that definition is where the money hides.
- What is your complete compensation, in dollars, for handling my plan? A transparent PBM can answer with one number. A traditional one can't answer at all.
- May my auditor annually reconcile what I was billed against pharmacy remittances? Watch for audit clauses with narrow scopes, short windows, or "mutually agreeable" auditor language.
- Who owns my claims data, and can I take it with me? If leaving is expensive, staying isn't a choice.
See the model on your own numbers
We'll reprice your actual claims against full pass-through contracts and show you the gap — line by line, no obligation.