Glossary · Reimbursement

Bundled payment

A bundled payment is a single, predetermined reimbursement covering all provider services related to a defined clinical episode—such as a total joint replacement—rather than separate fee-for-service payments for each individual service delivered.

Verified May 8, 2026 · 5 sources ↓

Drawn from CMSNIHAAOS

Definition

Source · Editorial summary grounded in 5 cited references ↓

Under traditional fee-for-service, every discrete service—a surgeon's time, an anesthesia charge, an inpatient stay, post-acute physical therapy—generates its own claim and its own payment. Bundled payment collapses those separate payments into one target price for the entire episode of care. If total spending across all participating providers falls below that target, the savings can be shared (gainsharing). If spending exceeds the target, the responsible entity may owe CMS the difference.

In orthopedics, bundled payment models most commonly wrap around total hip arthroplasty (THA) and total knee arthroplasty (TKA), though spine, fracture care, and other musculoskeletal episodes are also included in various CMS Innovation Center models. The episode typically starts at hospital admission and extends 30, 60, or 90 days post-discharge, capturing readmissions, skilled nursing facility stays, home health, and outpatient rehabilitation. The Comprehensive Care for Joint Replacement (CJR) model and the Bundled Payments for Care Improvement Advanced (BPCI Advanced) program are the two most prominent federal frameworks relevant to orthopedic practices.

Participation has been largely voluntary at the practice level, though CMS has signaled movement toward mandatory participation in certain geographic areas. Quality metrics—including patient-reported outcomes, complication rates, and readmission rates—are built into the model, meaning financial performance alone does not determine whether a participant retains shared savings. The AAOS Registry Program was formally integrated into BPCI Advanced's Alternate Quality Measures Set beginning January 1, 2021, allowing registry-reported outcomes data to satisfy quality reporting requirements directly.

Why it matters

If your practice participates in BPCI Advanced or CJR and you do not actively manage post-acute utilization—particularly skilled nursing facility days and readmissions—you can end the performance period owing CMS a reconciliation payment rather than earning shared savings. Conversely, practices that coordinate care across the full episode (pre-habilitation, implant cost standardization, preferred post-acute networks) have documented per-episode savings. Surgeons who ignore bundle economics hand financial risk management to hospitals by default, reducing their leverage in gainsharing negotiations.

Common mistakes

Where people most often go wrong with this concept.

Source · Editorial brief grounded in cited references ↓

Confusing CPT-level code bundling (e.g., 29881 included in 29880) with episode-level bundled payment programs—these are entirely separate concepts that happen to share the word 'bundling.'
Underestimating post-acute care as a cost driver: SNF utilization and home health are frequently the largest variable expense within a TJA bundle, yet surgeons focus almost exclusively on implant cost.
Assuming the bundle ends at hospital discharge—most CMS models run 90 days post-discharge, so a readmission at day 60 still falls inside the episode and affects reconciliation.
Failing to track quality metrics alongside cost; shared savings can be withheld or clawed back for poor quality performance even when spending targets are met.
Not distinguishing between retrospective bundled payment (claims still flow fee-for-service, then a reconciliation occurs) and prospective bundled payment (a lump sum is paid upfront), which affects how cash flow and billing workflows are managed.
Missing the attribution methodology: if the surgeon performing the index procedure is not correctly identified as the episode initiator, the practice may bear financial risk without receiving the corresponding shared savings opportunity.

Related codes

Codes commonly involved when this concept appears in practice.

CPT

ICD-10

M17.11 M16.11

Modifiers

62 Two surgeons AS PA / NP / CNS assistant at surgery

Frequently asked questions

Source · Generated from the editorial pipeline, verified against 5 cited references ↓

01What is the difference between a bundled payment and a global surgical package?

A global surgical package bundles the surgeon's pre-operative, intra-operative, and post-operative visits for a single procedure into one CPT-based payment, typically covering 90 days. A bundled payment program operates at the episode level, combining every provider's and facility's costs—surgeon, hospital, anesthesia, rehab, SNF—into a single target price that may span the same 90 days but is fundamentally a population-health payment contract, not a CPT code rule.

02Is participation in CMS bundled payment programs mandatory for orthopedic surgeons?

Most current models remain voluntary for individual surgeons, though CJR has had mandatory participation periods tied to specific metropolitan statistical areas. CMS has consistently signaled intent to expand mandatory models, so voluntary participation now can build operational infrastructure before a mandate arrives.

03How does gainsharing work under a bundled payment model?

When total episode spending falls below the negotiated target price—accounting for quality metrics—CMS returns a portion of the savings to the episode initiator (often the hospital or physician group). That entity then distributes shares to participating providers, including surgeons, based on a pre-agreed formula. The surgeon's share is capped and subject to anti-kickback safe harbor requirements.

04Which orthopedic procedures are most commonly included in CMS bundled payment models?

Total knee arthroplasty and total hip arthroplasty are the most prevalent triggers. BPCI Advanced also covers lower extremity joint replacement more broadly, hip and femur fracture repair, spinal fusion, and revision joint procedures, among other musculoskeletal clinical episodes.

05How does the AAOS registry connection to BPCI Advanced reduce administrative burden?

Starting in 2021, quality data submitted through participating AAOS registries (such as the American Joint Replacement Registry) satisfies CMS's Alternate Quality Measures Set for BPCI Advanced, eliminating the need for duplicate reporting directly to CMS and reducing the data-entry load on practice staff.

Sources & references

Editorial content was developed using the following public sources. Last verified May 8, 2026.

Mira AI Scribe

Mira flags episodes that may fall under an active bundled payment arrangement at the point of operative note finalization. When a procedure maps to a CMS-designated bundle trigger (e.g., THA, TKA, or selected spine fusions), Mira appends a reimbursement-context alert reminding the coder to: (1) confirm whether the facility is a BPCI Advanced or CJR participant; (2) verify that all co-surgeon, assistant-surgeon, and post-acute claims use the correct modifiers (54/55 for split care, 62 for co-surgery) so downstream reconciliation attribution is accurate; and (3) flag any unplanned return-to-OR or ED visit within 90 days of the index date as a potential episode spend event. Mira does not auto-suppress legitimate separate charges within the bundle window but surfaces NCCI bundling edits (e.g., component codes subsumed by a comprehensive code) as distinct from episode-level bundle economics, preventing conflation of the two. Documentation prompts for functional status scores (e.g., HOOS Jr., KOOS Jr.) are surfaced at the 6-week and 90-day visits to support AAOS registry quality metric submission under the BPCI Advanced Alternate Quality Measures Set.

See Mira's approach

The Comprehensive Care for Joint Replacement (CJR) Model is a mandatory Medicare bundled-payment program that holds participating hospitals financially accountable for the total cost and quality of care during hip, knee, and ankle replacement episodes—from the procedure date through 90 days post-discharge.

BPCI Advanced Reimbursement

BPCI Advanced (Bundled Payments for Care Improvement Advanced) is a voluntary CMS episode-based payment model in which a single target price covers all Medicare Part A and B services within a 90-day clinical episode, and participants bear financial risk or reward based on whether actual spending falls below or above that target. It qualifies as an Advanced Alternative Payment Model (APM) under the Quality Payment Program.

Value-based care Reimbursement

Value-based care (VBC) is a reimbursement framework that ties provider payment to quality outcomes and cost efficiency rather than to the volume of services delivered. In orthopedics, it replaces or supplements traditional fee-for-service payments with alternative payment models (APMs) that reward coordinated, high-quality musculoskeletal care.

Global period Coding

The global period is the defined window of time—0, 10, or 90 days—during which Medicare and most payers consider routine pre- and post-operative care to be bundled into the payment for the surgical procedure itself. For major orthopedic surgery, that window is 90 days.