In my experience, dating back years, CMS releases Part B data by CPT code in two tranches.
In November, they release excel spreadsheets of national CPT usage and payment data, for the prior calendar year. These go on a page called, "Part B National Summary Data File."
https://www.cms.gov/data-research/statistics-trends-and-reports/part-b-national-summary-data-file
In around June, they release very detailed data by lab and/or physician, in a cloud database. This is data for the year 18 months prior.
https://data.cms.gov/provider-summary-by-type-of-service/medicare-physician-other-practitioners
Specifically, "Medicare physician and other practitioners by provider and service."
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However, right now in March 2025, the most recent data I can find is for CY2022 (which is available for both types of data above, the national Excel and the cloud physician- or lab-level data). So what is missing is, the CY2023 data that should have appeared in November 2024 at the first link shown above (National summary data file) but has not appeared.
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There is one CMS cloud database that IS updated to 2023, which is "Physician Supplier Procedure Summary." [Link below.] However, I haven't been able to sort and filter this 14M line database in a way that rolls up the data usefully without breaking each CPT code into too many lines.
So I haven't published my normal Autumn summary of prior-year national data, such as fall 2024 report for CY2023. For example, we'd ask what proportion of 2023 lab claims were under 81479, and other topics.
https://data.cms.gov/summary-statistics-on-use-and-payments/physiciansupplier-procedure-summary/data
