Ask a provider group what went wrong in a shared savings year and the first answers are usually benchmark methodology or an unlucky case mix. Dig into the panel and the more common culprit is attribution: the group was accountable for patients it had no realistic ability to manage.
How panels drift
Prospective attribution gives a panel at the start of the year, which is operationally convenient and clinically honest. Retrospective attribution assigns based on where care actually happened, which is actuarially tidier and strategically miserable: the care team learns in month fourteen who they were supposed to manage in month two.
Plurality-of-visits rules add a second layer of drift. A patient who sees a specialist four times and their primary care clinician twice may attribute away entirely, taking their costs with them in one direction and their quality numerator in another.
Questions worth asking before signing
- Prospective, retrospective, or prospective with retrospective reconciliation?
- What service categories count toward the plurality calculation?
- How are patients with no qualifying visit handled?
- How often is the attributed list delivered, and in what format?
- What is the documented process for disputing an assignment?
Operating under an imperfect rule
Reconcile monthly, not annually
Even where the contract reconciles once a year, the care team should refresh its working panel monthly. The goal is to find patients who have drifted in while there is still time to engage them.
Separate the two lists deliberately
The financially attributed panel and the clinically managed panel will never match exactly. Pretending otherwise produces outreach aimed at people another group is already seeing, and silence toward people nobody is.
Groups that track the delta between those two lists as a managed metric consistently outperform groups that assume the contract got it right.
