# JOHN WILLIAMSON JOHN WILLIAMSON is an ADHD evaluation provider with an address in GAINESVILLE, FL, United States. ## Details - Address: 1600 SW ARCHER RD, GAINESVILLE, FL, 326104004 - Phone: [352-265-0301]() - National Provider Identifier (NPI): 1215224977 - Credentials: PhD - Provider type: Clinical neuropsychologist - Source of the listing data: CMS NPI Registry, retrieved 2026-10-03, public, free ## Questions ### Where is JOHN WILLIAMSON? JOHN WILLIAMSON is at 1600 SW ARCHER RD, GAINESVILLE, FL, 326104004. ### How do I contact JOHN WILLIAMSON? To contact JOHN WILLIAMSON, call 352-265-0301. ### Is JOHN WILLIAMSON accepting new patients? That is not in the registry data. Call the phone number on the listing and ask about availability, wait times and insurance. ## Source From [CMS NPI Registry (National Plan and Provider Enumeration System)](https://npiregistry.cms.hhs.gov/api/?version=2.1&number=1215224977), license US government public data. CMS publishes NPPES provider data for open access under its data dissemination notice., checked 2026-10-06. Last updated October 6, 2026. ## Links - This ADHD evaluation provider on the [web page]() - [ADHD evaluations in GAINESVILLE]() - [Clinical neuropsychologists in GAINESVILLE]() - [More ADHD evaluation providers in GAINESVILLE]()