Variation in the Cost of Care for Primary Total Knee Arthroplasties

Derek A. Haas; Robert S. Kaplan

Article | Arthroplasty Today | March 2017

Variation in the Cost of Care for Primary Total Knee Arthroplasties

Abstract

The study examined the cost variation across 29 high-volume U.S. hospitals for delivering a primary total knee arthroplasty without major complicating conditions. Hospital and physician personnel costs were calculated using time-driven activity-based costing. Consumable supply costs, such as the prosthetic implant, were calculated using purchase prices, and post-acute care costs were measured using either internal costs or external claims as reported by each hospital. Despite having similar patient demographics as well as re-admission and complication rates, the average cost of care for total knee arthroplasty across the hospitals varied by a factor of about 2 to 1. Even after adjusting for differences in internal labor cost rates, the hospital at the 90th percentile of cost spent about twice as much as the one at the 10th percentile of cost. The large variation in costs among sites suggests major and multiple opportunities to transfer knowledge about process and productivity improvements that lower costs while simultaneously maintaining or improving outcomes.

Keywords: Cost Management; Performance Productivity; Health Care and Treatment; Health Industry;

Format: Electronic

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Citation:

Haas, Derek A., and Robert S. Kaplan. "Variation in the Cost of Care for Primary Total Knee Arthroplasties." Arthroplasty Today 3, no. 1 (March 2017): 33–37.

Objectives: To apply time-driven activity-based costing (TDABC) methodology to determine emergency medicine physician documentation costs with and without scribes.

Methods: Two research assistants shadowed attending physicians for a total of 64 hours in the adult emergency department. A tablet-based time recorded was used to obtain estimates for physician documentation time on both control (no scribe) and intervention (scribe) shifts.

Results: Control shifts yielded approximately 3 hours of documentation time per 8 hours of clinical time. When paired with a scribe, attending physician documentation decreased to 1 hour and 45 minutes during a shift and 15 minutes of post-shift documentation. The physician cost estimate for documentation without and with a scribe is 644 and 488 dollars, respectively.

Conclusions: TDABC methodology demonstrated that scribes afford a cost-effective solution to ED clinical documentation. The costing approach enables clinicians to understand utilization and cost of medical resource at a more granular level.

Article | Journal of Medical Economics | Forthcoming

Time-Driven Activity-Based Cost Analysis for Outpatient Anticoagulation Therapy: Direct Costs in a Primary Care Setting with Optimal Performance

Robert S. Kaplan, Rohit A. Bobade, Richard A. Helmers, Thomas M. Jaeger, Laura J. Odell and Derek A. Haas

Objectives: To determine how overall cost of anticoagulation therapy for warfarin compares with that of Novel Oral Anticoagulants (NOACs). Also, to demonstrate a scientific, comprehensive, and an analytical approach to estimate direct costs involved in monitoring and management of anticoagulation therapy for outpatients in an academic primary care clinic setting, post-initiation of therapy.

Methods: Time-Driven Activity-Based Costing (TDABC) was applied in a population-based cross-sectional study at Mayo Clinic’s warfarin anticoagulation clinic. The study measured the personnel and supplies costs to monitor and manage anticoagulation therapy for 5,526 patients.

Results: The cost of warfarin management for patients who display unstable International Normalized Ratio (INR) is more than three times those who display stable INR over time. For complex anticoagulation patients, the total cost of medication and monitoring for warfarin anticoagulation therapy is similar to that for NOACs.

Conclusion: Despite warfarin being significantly less expensive to purchase than NOACs, overall warfarin management incurs higher costs due to laboratory monitoring and provider time than NOACs. NOAC treatment, therefore, may not be more expensive than warfarin therapy management for complex anticoagulation patients.

Keywords: Time-Driven Activity-Based Costing; Activity Based Costing and Management; Health Care and Treatment; Analysis;

Citation:

Kaplan, Robert S., Rohit A. Bobade, Richard A. Helmers, Thomas M. Jaeger, Laura J. Odell, and Derek A. Haas. "Time-Driven Activity-Based Cost Analysis for Outpatient Anticoagulation Therapy: Direct Costs in a Primary Care Setting with Optimal Performance." Journal of Medical Economics (forthcoming). (Pre-published online March 4, 2019.) View Details

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Kurt Meyer, chief risk officer of Swissgrid, the Swiss national electricity transmission system operator, reflects on the risk management system he installed after the deregulation and liberalization of the European energy market. With 41 connections to other European networks, a failure in Swissgrid’s network could interrupt the supply of electricity in Switzerland and much of Europe. Meyer describes the periodic interactive risk workshops conducted at each business unit to identify, assess, and mitigate risks. Executive Risk Workshops focus on the CEO and the company’s leadership team and discuss the business units’ risk profiles and risks that cut across the units, such as safety, weather, and regulatory changes. New and emerging risks are discussed at Extraordinary Risk Workshops. Meyer recently deployed an app on employees’ smartphones for them to easily report anomalies or concerns. Reports from the app are embedded in a new real-time crisis management platform used by several Swiss companies, federal authorities, and the Swiss Army. Despite a full array of risk management tools and processes, Meyer remains concerned about risks yet to be identified.

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Variation in the Cost of Care for Primary Total Knee Arthroplasties

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