Increased Imaging Rates Linked to Clinician Self-Interpretation

A recent study conducted by the Harvey L. Neiman Health Policy Institute has uncovered significant insights into imaging utilization patterns among Medicare beneficiaries. The research indicates that clinicians who interpret the imaging they order are associated with heightened imaging use compared to those who refer these tasks to radiologists. According to the study, the odds of an imaging procedure following an office visit are 188% higher in cases where the ordering provider self-interpreted the imaging results. This finding emerges from an extensive analysis of 24.2 million Medicare office visits, as published in the Journal of the American College of Radiology (JACR).

The research evaluated imaging activities within 30 days following patient office visits utilizing a 5% sample of Medicare fee-for-service beneficiaries from 2021 to 2023. It was found that 13.6% of patient visits resulted in imaging, and 33.2% of these were interpreted by the ordering clinicians themselves.

Remarkably, practices that consistently referred imaging to radiologists exhibited lower imaging rates post-office visits. Specifically, these practices showed reduced odds of imaging on a scale ranging from 5% for MR to 41% for ultrasound comparisons, with an exception noted in CT use. Stronger associations were demonstrated when clinicians who ordered the imaging also undertook its interpretation, notably resulting in a 54% to 251% increased likelihood of imaging depending on the modality.

Dr. Rao, senior author and Professor Emeritus at Thomas Jefferson University, highlighted that self-interpretation by the ordering clinician emerged as a significant predictor of imaging utilization. "The consistent association across modalities suggests that self-interpretation influences clinical decision-making, similar to self-referral, which is known for increasing imaging rates," Dr. Rao commented.

Dr. Eric Christensen, the research director at the Neiman Institute and lead author, underscored the implications for health policy, advocating for more stringent standards governing non-radiologist imaging interpretation. He suggested that eliminating self-interpretation could potentially reduce office-based imaging by 17%.

Concerns center on ensuring imaging's clinical relevance and quality interpretation, not necessarily reverting interpretation exclusively to radiologists. Dr. Rao pointed out, "Imaging interpretation impacts patient outcomes and healthcare costs substantially."

Dana Smetherman, CEO of the American College of Radiology, emphasized the need for evidence-based tools to guide physicians in ordering imaging appropriately. The organization's support for legislation like the Patients First Act, H.R. 9693, aims to promote responsible imaging practices by requiring that ordering physicians consult appropriate use criteria.

The study underlines the critical role of radiologists and underscores the broader impacts of ordering practices on healthcare delivery and costs.