The mechanics to confirm before you commit to volume
A volume relationship raises specific questions a clinic should resolve before signing. Ask whether your rate is tied to a minimum monthly order, what happens if you fall short, and whether better terms require a contract length. Ask whether the rate is per SKU or blended across your order mix, since a strong rate on one drug can mask a weaker one on another. And ask whether rates reset or change at renewal, because a launch rate that drifts upward changes your margin math after you have already built patient pricing around it.
The harder issue with any unpublished volume model is verification. Without public tiers, you cannot independently check whether the rate you receive reflects the volume you bring. That is not a reason to dismiss the relationship — a large compounder can genuinely offer competitive rates — but it is a reason to get the curve in writing for your SKUs rather than relying on a general volume claim.