The Comprehensive Care for Joint Replacement model tested bundled payment at scale, with participation required rather than voluntary. This case covers what eight years showed.
Most value-based models are voluntary, which means the organizations most confident they can win are the ones that join. The Comprehensive Care for Joint Replacement (CJR) model broke that pattern: hospitals in selected metropolitan areas were required to participate, making it the closest thing bundled payment has had to a true at-scale test.
The model
| Element | Detail |
|---|---|
| Period | April 2016 through December 2024, eight performance years |
| Scope | Hip and knee replacement episodes: hospitalization plus 90 days after discharge |
| Participation | Mandatory in 67 metro areas at launch; scaled back to 34 mandatory areas in February 2018 |
| Mechanic | Episode spending reconciled against a target price; hospitals keep savings or repay overruns |
What the evaluations found
- In the model’s sixth performance year, CJR hospitals’ episode payments were $1,012 lower (3.5 percent of baseline) than comparison hospitals.
- The reductions were driven mostly by lower inpatient rehabilitation facility payments (a decline of $571, about 26 percent of baseline), confirming that post-acute utilization was the main lever.
- CMS estimated $112.7 million in net savings to Medicare across performance years six and seven combined, with quality of care maintained.
- An independent two-year evaluation published in the New England Journal of Medicine reached the same qualitative conclusion early: modest episode savings, concentrated in post-acute care, without quality harm.
Worth remembering: “net savings” is the number that matters. Gross episode savings must exceed the reconciliation payments CMS pays back to hospitals before the taxpayer sees anything, and in CJR’s early years that margin was thin.
What came next
CMS judged the mandatory-episode approach worth scaling. Its successor, the Transforming Episode Accountability Model (TEAM), extends mandatory surgical bundles to more procedures and more hospitals beginning in 2026.
What to take from it
CJR validated the bundle logic from Module 2 almost exactly as designed: savings appeared where providers had controllable choices (post-acute pathways) and quality held. It also demonstrated why mandatory models matter for evidence: with participation required, the results cannot be explained away as self-selection by confident hospitals.
Sources
Check your understanding
Where did most of CJR's episode savings come from?
The evaluation found reductions concentrated in post-acute spending, especially inpatient rehabilitation facility payments, exactly the lever bundle designs predict.