494 Clinical Neurophysiology providers practice across all 50 states and Washington DC, and 47% received drug or device company payments in 2025. California has the most at 72. Listings are drawn from federal public records and are not endorsements.
Industry payment share ranges from 54% in Pennsylvania to 39% in Ohio, among states with 25 or more providers.
There are 494 Clinical Neurophysiology providers with active NPI records across all 50 states and Washington DC, according to federal NPPES data refreshed monthly. California has the most at 72.
234 of 494 Clinical Neurophysiology providers nationally (47%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program. The share is highest in Pennsylvania at 54% and lowest in Ohio at 39%.
Provider counts come from the federal NPPES registry and CMS Doctors and Clinicians files. Payment figures come from the CMS Open Payments program for calendar year 2025. The directory refreshes monthly.
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