Bundled Payment Billing for Orthopedic: Avoiding the Days-in-AR Trap

Reviora Healthcare LLC | Guaranteed Revenue Partner

A surgeon finishes a clean knee replacement. Ninety days later, the hospital is closing out the episode, your staff is still chasing an authorization from week one, and your AR report shows claims aging that nobody flagged. That’s the days-in-AR trap: not one big mistake, but small delays stacking up inside a payment model with no slack. Every extra week is cash you already earned sitting in someone else’s queue.

What Is Bundled Payment Billing in Orthopedics?

Bundled payment sets one target price for an entire episode of care, the procedure plus related services through 90 days after discharge, instead of paying each piece separately. CMS tested this on hip, knee, and ankle replacements through its Comprehensive Care for Joint Replacement (CJR) Model, which ran in 34 metropolitan areas until December 31, 2024. CMS’s final evaluation, published in September 2026, found the model generated $180 million in Medicare savings while preserving care quality. CMSCenters for Medicare & Medicaid Services

That result is why the model is going national. CJR-X will be mandatory nationwide and begin January 1, 2028. If your surgeons do joint replacements, see how we handle orthopedic revenue cycle management.

Who Carries the Risk, and Why Does It Reach Your Billing Office?

Under CJR-X, the hospital carries the financial risk, not the practice. Participating acute care hospitals are measured against a target price covering the procedure, the stay, post-discharge therapy, and follow-up visits. CMS

Your practice isn’t the party repaid or repaying, but expect hospital partners to demand cleaner documentation, faster authorizations, and tighter coordination from surgeons’ offices. That pressure lands on your billing team. If your process was built for one claim at a time, the added coordination is where days start slipping.

Why Does Days in AR Creep Up Under Episode-Based Payment?

Days in AR creeps up because delays compound: one late step pushes every step after it. Days in AR, per HFMA’s methodology, is net accounts receivable divided by average daily net patient service revenue, in plain terms, how long the average dollar waits to be collected. TechTarget

Three delays do most of the damage in ortho:

• An authorization that clears after the surgery date instead of before it.
• Documentation gaps that stall a claim until someone notices.
• A denial worked at day 45 instead of day 5.

None looks serious alone. Together they age every dollar behind them, which is why a dedicated AR recovery process works claims by age instead of waiting for month-end.

How Much Does Prior Authorization Add to the Delay?

Prior authorization is usually the first link in the chain, and when it’s late, everything downstream is late. In AMA’s May 2026 survey release, 95% of physicians said prior authorization delays access to necessary care, and 79% said patients abandon treatment because of authorization challenges. American Medical Association

For a scheduled joint replacement, an authorization still pending near the surgery date raises the risk of a denial after the fact. Fixing it upstream, verifying and documenting before the case is booked, is cheaper than appealing after. Our claims and denial management team works this way.

What Does an Expert-Led Fix Look Like?

It starts with people who own the outcome, backed by a written commitment. Reviora runs on Expert-Led Technology: credentialed RCM specialists lead every account, and technology supports them by flagging stalled claims early.

Our Managed Outcomes Agreement is a written contractual performance agreement built around five benchmarks, days in AR among them. If performance misses for two consecutive months, the Benchmark Recovery Protocol activates: an accountability mechanism, not a sales conversation. You can see how the benchmarks work before you talk to anyone.

CJR-X is about 15 months out. The practices that come through it well will be the ones that tightened authorization and AR follow-up before hospitals started asking. If you want an outside read on your current process, book a 30-minute consult. We’ll look at your AR aging and tell you plainly where the exposure is. Ready to move? Get started here.

FAQ

What is a bundled payment in orthopedic surgery?
It’s one target price for an entire episode of care, covering the procedure and related services through 90 days after discharge, instead of separate payments for each service.

Is the CMS joint replacement bundled payment mandatory?
For the hospitals it covers, yes. CJR ended December 31, 2024, and its expansion, CJR-X, is scheduled to be mandatory nationwide from January 1, 2028.

How many days in AR is too many for an orthopedic practice?
No single figure fits every practice, and many published specialty benchmarks can’t be traced to a named source. Start with your own trailing 12-month days in AR, then look at how much of your AR is sitting in the oldest buckets.

How can an orthopedic practice reduce days in AR?
Clear authorizations before the surgery date, work denials in days rather than weeks, and review AR by age every week. A written performance agreement with your billing partner keeps someone accountable for the number.

Reference

• Centers for Medicare & Medicaid Services. “CJR-X (Comprehensive Care for Joint Replacement Expanded) Model.” CMS.gov, 2026. https://www.cms.gov/priorities/innovation/innovation-models/cjr-x
• Centers for Medicare & Medicaid Services. “Innovation Insight: Final CJR Evaluation Report Shows $180M in Savings Ahead of Nationwide Expansion.” CMS.gov, September 24, 2026. https://www.cms.gov/initiatives/innovation-center/about/innovation-insight-final-cjr-evaluation-report-shows-180m-savings-ahead-nationwide-expansion
• American Medical Association. “AMA survey: Prior authorization reform pledge falls short with physicians.” AMA-assn.org, May 13, 2026. https://www.ama-assn.org/press-center/ama-press-releases/ama-survey-prior-authorization-reform-pledge-falls-short-physicians
• Healthcare Financial Management Association. “Ask the Experts: Net Days in A/R.” HFMA.org. https://www.hfma.org/accounting-and-financial-reporting/52117/