CMS has proposed the first nationwide expansion of an episode-based payment model, and by its own account the largest such model in Medicare’s history: a mandatory program covering lower extremity joint replacements (LEJR). It is called CJR-X, short for Comprehensive Care for Joint Replacement Expanded, and if finalized, it would begin October 1, 2027, as an ongoing program tied to the federal fiscal year. CJR-X was proposed in the CMS FY2027 IPPS Proposed Rule (91 Fed. Reg. No. 71, April 14, 2026) and remains subject to change until the final rule is issued. CFOs, chief quality officers, orthopedic service line leaders, and population health teams should all be paying attention. If you run an acute care hospital that bills Medicare for lower extremity joint replacements, this is not a model you can opt out of.
The mechanics would feel familiar to anyone who participated in the original CJR Model, which produced $112.7 million in net Medicare savings across performance years 6 and 7 (CMS CJR Performance Year 7 evaluation report, December 2025), or to anyone who is preparing for the Transforming Episode Accountability Model (TEAM). CJR-X is not a copy of either, and the differences would shape what your team needs to do now.
Key facts at a glance
These details reflect CMS’s proposed rule and could change in the final rule.
- Start date: October 1, 2027 (Performance Year 1 ends September 30, 2028)
- Model length: Ongoing, with performance years aligned to the federal fiscal year
- Participation: Mandatory and nationwide for acute care hospitals paid under IPPS and OPPS, with the exception of hospitals located in Maryland and those participating in TEAM
- Episodes covered: Inpatient LEJR (MS-DRGs 469, 470, 521, 522) and outpatient LEJR (HCPCS 27447, 27130)
- Episode length: 90 days post-anchor
- Benchmarking: 36 regional benchmark prices built from U.S. Census Divisions
- Discount factor: 2 percent (lower than CJR’s original 3 percent), with potential reduction based on quality performance
- Risk adjustment: Hospital-level factors (safety-net status, bed size) plus beneficiary-level factors (age, economic risk, prior post-acute care use, disability status, procedure type, 22 HCC flags, and an HCC count), all from a 180-day lookback
- Quality: Composite Quality Score capped at 20 points
Source: CMS FY2027 IPPS Proposed Rule, published in the Federal Register on April 14, 2026.
What is CJR-X?
CJR-X is an episode-based payment model. Medicare would continue to pay hospitals and downstream providers for every service tied to a hip or knee replacement exactly as it does today. CJR-X then adds a retrospective reconciliation that compares actual spending against one expected price for LEJR-related services across the full 90-day care journey. If actual spending is below the target, the hospital can earn a reconciliation payment. If it exceeds the target, the hospital owes money back. The episode starts on the day of the anchor procedure and covers the anchor stay or outpatient procedure, related readmissions, post-acute care, physician services, durable medical equipment, and Part B drugs tied to the joint replacement.
Who has to participate?
Participation is mandatory for nearly every acute care hospital that initiates a LEJR episode and is paid under both IPPS and OPPS. Exclusions are narrow: hospitals enrolled in TEAM, hospitals in Maryland, Indian Health Service and Tribal hospitals, Critical Access Hospitals, Rural Emergency Hospitals, and participants in the Rural Community Hospital Demonstration. Once TEAM concludes, former TEAM participants roll into CJR-X automatically. The nationwide scope is the biggest practical change from the original CJR Model, and the ramp would be especially steep for any hospital with no prior episode-based payment experience, including rural and safety-net facilities and the many hospitals that previously chose not to take on this kind of risk.
How does CJR-X compare to TEAM?
Hospital leaders who have followed TEAM would see overlap, but the two models do not behave the same way. TEAM uses a 30-day post-discharge window and covers five surgical episode categories, while CJR-X would use a 90-day window and focus on a single LEJR episode category. TEAM applies in selected geographic markets, and CJR-X would apply almost everywhere else. The longer window in CJR-X would create more opportunity to manage post-acute spending, but also more exposure to readmissions and care transitions that fall further from the anchor procedure. For deeper context, see our prior coverage on how TEAM target prices come together, what TEAM’s first year is testing, and Milliman’s foundational TEAM considerations white paper.
How is the target price actually calculated?
The CJR-X target price is built from a regional benchmark, trended forward, normalized for case mix drift, risk-adjusted, and then discounted. The formula is:
Preliminary Target Price = Benchmark Price x Prospective Trend Factor x Prospective Normalization Factor x Risk Adjustment Multipliers x Discount Factor
The benchmark is regional, not national. CMS divides the country into nine U.S. Census Divisions and builds a benchmark for each of four-episode types in each division, giving 36 benchmark prices total. Baseline data comes from three years of historical episodes, weighted 17, 33, and 50 percent toward the most recent year, with episode spending capped at the 99th percentile. Risk adjustment uses the same methodology as TEAM, combining hospital-level factors (safety-net status and bed size) with beneficiary-level factors (age, economic risk, prior post-acute care use, disability status, procedure type, 22 specific HCC flags, and an overall HCC count) drawn from a 180-day lookback before each episode. The full discount factor is 2 percent, lower than the original CJR Model’s 3 percent.
Bottom line: If your patient population is documented accurately and your post-acute care is well coordinated, the math is winnable. If documentation lags or post-acute spending runs hot, the math gets hard quickly.
What counts as a “good” outcome under CJR-X?
Spending below target is half the picture. Quality is the other half. Each hospital receives a Composite Quality Score (CQS) capped at 20 points and built from five measures covering both inpatient and outpatient LEJR. The CQS determines whether a hospital is eligible to earn a reconciliation payment, and it sets the effective discount factor applied at reconciliation. Hospitals scoring in the “Below Acceptable” band earn nothing even when their actual episode spending beats target, while top-tier hospitals can reduce their effective discount to zero.
What hospital leaders should be doing now
October 2027 sounds far away, but it is not. Baseline data is already accruing, and the work that determines whether you win or lose under CJR-X happens well before reconciliation. Three priorities stand out:
- Benchmark against your U.S. Census Division now. Regional pricing means the hospital next door is the competition, and the gap between your current performance and the regional benchmark is the most important number on the dashboard.
- Tighten HCC documentation. The 22 HCC flags and 180-day lookback only credit conditions actually captured in claims, and undercoded comorbidities translate directly into a target price that does not reflect your real case mix.
- Reassess post-acute partnerships. Under the original CJR Model, reductions in episode spending were driven largely by lower inpatient rehabilitation facility (IRF) payments, with smaller and statistically non-significant changes in skilled nursing and home health use (CMS CJR Performance Year 7 evaluation report, December 2025). Because CJR-X would keep the same 90-day window, post-acute care remains a central lever for managing total episode cost. And because nearly three in four hip and knee replacement episodes were performed in the outpatient setting by the end of the original CJR Model (CMS FY2027 IPPS Proposed Rule, 91 Fed. Reg. No. 71), those partnerships would extend further into ambulatory pathways than they did under the original program.
How MedInsight Bundles help hospitals win under CJR-X
MedInsight Bundles is purpose-built for episode-based programs like CJR-X and TEAM. It uses claims data to identify episodes, track performance against regional benchmarks, model reconciliation under CMS rules, and surface variation across surgeons, facilities, and post-acute partners.
What sets MedInsight apart for CJR-X:
- Risk analytics built for action: Our risk analytics produce benchmarking and projections more nuanced than those of generic episode tools, which drives action inside finance, quality, and service-line teams before reconciliation surprises hit.
- A decade of episode-based payment know-how: More than 10 years building the episode analytics, benchmarking, and reconciliation tooling that episode-based payment participants rely on — led by a team with nearly 20 years of combined CMS episode-based payment model experience. The result: tooling that mirrors how CMS would actually run reconciliation.
- One shared 90-day episode view: A full view of the 90-day window across anchor stay, post-acute care, and outpatient pathways gives finance and quality teams one shared episode view.
- Data you can stand behind: Every episode is built on claims that are validated and audited before they reach your dashboards so finance and quality teams act on numbers they can trust instead of second-guessing them.
For hospitals new to episode-based payment, including rural and safety-net facilities with limited in-house analytics, MedInsight Bundles supports scenario modeling, HCC gap analysis, CQS tracking against the measures CMS would actually score, and reconciliation auditing. No internal analytics build is required to get a credible view of where you stand.
CJR-X readiness is not a finance problem alone. It is shared work across finance, quality, and orthopedic service lines, and the hospitals that win share one episode view across all three.
