Medicare data show interventional radiology practice concentration nearly doubling since 2008

The proportion of U.S. radiologists devoting a majority of their practice to interventional radiology (IR) rose from 12.6% to 18.5% (2008–2023), while those spending >90% on IR nearly doubled from 4.1% to 8.8%.

• Fewer diagnostic radiologists are performing small amounts of IR; a growing share of distinct interventional radiologists now devote nearly all their clinical workload to the specialty.
• The findings highlight IR’s maturation from subspecialty to primary specialty, according to SIR leaders.

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