Summary & Overview

Revision of Hip or Knee Replacement with MCC: Inpatient Reimbursement Overview

DRG 466 addresses revision of hip or knee replacement procedures complicated by a Major Complication or Comorbidity, encompassing cases with significant clinical severity that drive higher resource use. This Diagnosis-Related Group matters for inpatient reimbursement because it assigns higher payment weights to reflect increased operating room, perioperative, and postoperative resource needs.

Revision of Hip or Knee Replacement with MCCDRG Revision of Hip or Knee Replacement with MCCDRG 466Diagnosis-Related GroupInpatient ReimbursementMedicareOrthopedicsJoint ReplacementArthroplastyPerioperative Care

DRG 466 Overview

DRG 466 covers revisions of hip or knee joint replacement procedures when a Major Complication or Comorbidity is present, reflecting higher clinical complexity such as severe infection, major bleeding, or prosthesis failure with systemic effects. This Diagnosis-Related Group groups inpatient stays that typically require extended operative time, higher-intensity perioperative management, and additional resources. It matters for Medicare payment because the presence of a Major Complication or Comorbidity increases resource use and places the case in a higher-severity payment category. Accurate clinical documentation and coding determine assignment to this Diagnosis-Related Group and the corresponding inpatient reimbursement level.

Clinical Trials

Acute perioperative intervention trials evaluating strategies to reduce serious complications in patients undergoing revision hip or knee arthroplasty with major comorbidities or acute perioperative complications (the cohort represented by an MCC). These studies typically test perioperative care bundles, infection prevention protocols, blood management approaches, or anesthesia strategies in patients with prosthetic joint failure, periprosthetic infection, or acute medical instability. Results are highly relevant to hospitals and payers because interventions that reduce ICU stays, transfusions, reoperations, or readmissions can materially lower length of stay and high-cost resource use associated with DRG 466 admissions.
Comparative effectiveness trials comparing surgical techniques or implant and fixation strategies for complex revision procedures in high-risk patients. These studies enroll patients requiring revision for loosening, instability, massive bone loss, or failed prior revisions and compare outcomes such as re-revision rates, functional recovery, and complications across approaches (for example, modular implants, constrained components, or different bone reconstruction methods). Findings inform surgical decision-making and utilization patterns that affect episode costs and long-term readmission or reoperation rates important to clinicians and payers managing DRG 466 populations.
Post-discharge outcomes and care-coordination studies focusing on recovery trajectories, rehabilitation intensity, and post-acute resource use among patients discharged after revision hip or knee surgery with major complications. These observational or pragmatic trials assess which discharge planning strategies, home health models, or outpatient rehabilitation pathways reduce 90-day complications, emergency visits, or skilled nursing facility utilization in patients with substantial comorbidity burden. Such evidence helps health systems and payers optimize post-acute pathways to improve patient outcomes while controlling the high downstream costs frequently incurred after complex revision admissions.

Related Codes

540-OSTEOMYELITIS-WITH-CC

Osteomyelitis with Complication or Comorbidity: Inpatient Reimbursement Overview

549-SEPTIC-ARTHRITIS-WITH-CC

Septic Arthritis with Complication or Comorbidity: Inpatient Reimbursement Overview

429-COMBINED-ANTERIOR-AND-POSTERIOR-CERVICAL-SPINAL-FUSION-WITH-MCC

Combined Anterior and Posterior Cervical Spinal Fusion with MCC: Inpatient Reimbursement Overview

539-OSTEOMYELITIS-WITH-MCC

Osteomyelitis with Major Complication or Comorbidity: Inpatient Reimbursement Overview

560-AFTERCARE-MUSCULOSKELETAL-SYSTEM-AND-CONNECTIVE-TISSUE-WITH-CC

Aftercare, Musculoskeletal System and Connective Tissue with CC: Inpatient Reimbursement Overview

494-LOWER-EXTREMITY-AND-HUMERUS-PROCEDURES-EXCEPT-HIP-FOOT-AND-FEMUR-WITHOUT-CC-MCC

Lower Extremity and Humerus Procedures Except Hip, Foot and Femur without CC/MCC: Inpatient Reimbursement Overview

518-BACK-AND-NECK-PROCEDURES-EXCEPT-SPINAL-FUSION-WITH-MCC-OR-DISC-DEVICE-OR-NEUROSTIMULATOR

Back and Neck Procedures Except Spinal Fusion with MCC or Disc Device or Neurostimulator: Inpatient Reimbursement Overview

519-BACK-AND-NECK-PROCEDURES-EXCEPT-SPINAL-FUSION-WITH-CC

Back and Neck Procedures Except Spinal Fusion with CC: Inpatient Reimbursement Overview

456-SPINAL-FUSION-EXCEPT-CERVICAL-WITH-SPINAL-CURVATURE-MALIGNANCY-INFECTION-OR-EXTENSIVE-FUSIONS-WITH-MCC

Spinal Fusion Except Cervical with MCC: Inpatient Reimbursement Overview

522-HIP-REPLACEMENT-WITH-PRINCIPAL-DIAGNOSIS-OF-HIP-FRACTURE-WITHOUT-MCC

Hip Replacement with Principal Diagnosis of Hip Fracture without MCC: Inpatient Reimbursement Overview

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