Getting paid less for more: shoulder arthroplasty incidence and reimbursement within Medicare from 2000 to 2019.

BACKGROUND: Shoulder arthroplasty has grown in popularity in the past 2 decades, especially following US Food and Drug Administration approval of reverse total shoulder arthroplasty (TSA) in 2003. Studies have shown that Medicare reimbursement for a variety of orthopedic procedures has decreased significantly over the past 2 decades. No study has evaluated this trend in the setting of shoulder arthroplasty, however. The purpose of this study was to assess true reimbursement trends in primary and revision shoulder arthroplasty since 2000. METHODS: Information was collected from the publicly available Medicare Part B National Summary Data Files for the period of 2000 to 2019. Data from Current Procedural Terminology codes 23470 (shoulder hemiarthroplasty), 23472 (TSA), 23473 (single-component revision shoulder arthroplasty), and 23474 (both-component revision shoulder arthroplasty) were analyzed. Reimbursement amounts were adjusted for inflation to May 2021 dollars. RESULTS: From 2000 to 2019, the number of shoulder hemiarthroplasty procedures billed to Medicare decreased 70% (from 5847 to 1750) whereas the number of TSA procedures increased 1527% (from 4044 to 65,477). During the same period, per-procedure Medicare reimbursement for hemiarthroplasty decreased 35% (from $1545.71 to $1003.43) after adjustment for inflation to 2021 dollars. Similarly, TSA reimbursement decreased 22% (from $1600.98 to $1248.76) after adjustment for inflation. For revision procedures, the number of single- and both-component revisions billed to Medicare increased 381% (from 344 to 1655) and 1331% (from 220 to 3147), respectively. Adjusted reimbursement per procedure decreased 36% (from $1931.62 to $1244.49) and 37% (from $2293.08 to $1449.43), respectively. CONCLUSION: This study shows an increase in the annual volume of primary and revision shoulder arthroplasty procedures from 2000 to 2019. During the same period (2000-2019), true Medicare reimbursement to physicians for TSA decreased when adjusted for inflation. This study provides data that may be useful for surgeons, hospitals, and policy makers to maintain access to quality shoulder arthroplasty care moving forward.