# JOHN WALKER JOHN WALKER is a ADHD evaluation provider with an address in PHOENIX, AZ, United States. ## Details - Address: 3550 N CENTRAL AVE, PHOENIX, AZ, 850122112 - Phone: [602-216-6900]() - National Provider Identifier (NPI): 1871634485 - Credentials: PsyD - Provider type: Clinical neuropsychologist - Source of the listing data: CMS NPI Registry, retrieved 2026-10-02, public, free ## Questions ### Where is JOHN WALKER? JOHN WALKER is at 3550 N CENTRAL AVE, PHOENIX, AZ, 850122112. ### How do I contact JOHN WALKER? To contact JOHN WALKER, call 602-216-6900. ### Is JOHN WALKER 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=1871634485), license Public data, free to reuse. NPI data is public under CMS data dissemination., checked 2026-10-03. Last updated October 3, 2026. ## Links - This ADHD evaluation provider on the [web page]() - [ADHD evaluations in PHOENIX]() - [Clinical neuropsychologists in PHOENIX]() - [More ADHD evaluation providers in PHOENIX]()