Trends in Cervical Laminoplasty Incidence in the United States: A Comparison of Commercial Insurance, Medicare, and Device Manufacturer Databases.

STUDY

DESIGN

Retrospective database study.

OBJECTIVE

To leverage a commercial insurance claims database to explore trends in laminoplasty utilization and reimbursement in the United States. Secondarily, volume estimates were compared with data from the industry and from the Centers for Medicare and Medicaid (CMS).

SUMMARY OF BACKGROUND DATA: With purported benefits of motion preservation and lower complication rates than fusion, cervical laminoplasty is an important surgical technique. However, current commercial database studies suggest that laminoplasty adoption in the United States has been slow.

METHODS

The primary outcome was the total volume of laminoplasty procedures performed in the United States per year. Truven, a large commercial insurance claims database, was used to estimate laminoplasty volume from 2009 to 2019. Volume estimates for posterior cervical fusions were also generated as a comparator. Reimbursement data for laminoplasty adjusted for inflation were also generated. Trends in national procedural volumes and reimbursement over time were assessed with the Pearson correlation test. CMS Part B national summary statistics from 2000 to 2022 and market data from laminoplasty device manufacturers from 2017 to 2024 were qualitatively compared with volume estimates from Truven.

RESULTS

Truven volume of laminoplasty remained stable throughout the study period with an estimated annual volume of 944-1590 cases. Posterior cervical fusion volume was much higher, ranging from 7930 to 11,874 cases with increased trend. When compared qualitatively, Truven volume estimates were similar to those from CMS data, although industry volume estimates were comparatively higher (estimated total volume of 8352-11,428 cases). There was no statistically significant trend in Truven reimbursement values for laminoplasty from 2009 to 2019.

CONCLUSIONS

Industry market data suggest more laminoplasty procedures are being performed nationally than what is estimated by commercial/CMS databases. This suggests possible growth in laminoplasty usage, given purported advantages to fusion in the properly indicated patient, and possibly calls into question the epidemiological accuracy of commercial claims databases.

LEVEL OF EVIDENCE: IV-Retrospective study.