# Funding of evidence included within public comments submitted to inform Medicare national coverage determinations

## TL;DR

Most public comments to Medicare coverage decisions don't cite scientific studies, and many cited studies are funded by manufacturers.

## Contribution

The study reveals that over half of cited studies in public comments are funded by manufacturers.

## Key findings

- Only 23% of public comments cited published scientific articles.
- 56% of cited articles were funded by manufacturers that would benefit from coverage.
- Most commenters did not use published research to support their positions.

## Abstract

The Centers for Medicare & Medicaid Services (CMS) relies on public comments submitted in response to proposed national coverage determinations to assist the agency in determining the coverage of items and services for Medicare beneficiaries. In a cross-sectional study, we characterized the cited evidence and what funding supported the cited evidence submitted in public comments to CMS for all therapeutic medical device national coverage determinations finalized between June 2019 and June 2022. Of 681 public comments, 159 (23%) cited at least 1 identifiable published scientific journal article. Within these 159 public comments, 198 unique articles were cited, 170 (86%) of which included funding statements or author disclosures. Among these, 96 (56%) disclosed funding from manufacturers that would benefit from Medicare coverage and/or were written by author(s) who received funding from these manufacturers. In summary, most public commenters for national coverage determinations did not cite published scientific journal articles to support their positions. Among those who did, more than half of articles were directly funded by manufacturers that would benefit from coverage. Greater funding of independent, non–industry-supported research may help provide unbiased evaluations of benefits and harms to support Medicare coverage decisions.