# MARK SANDBERG MARK SANDBERG is an ADHD evaluation provider with an address in PORT JEFFERSON, NY, United States. ## Details - Address: 200 BELLE TERRE RD, PORT JEFFERSON, NY, 117771928 - Phone: [631-474-6000]() - National Provider Identifier (NPI): 1831191709 - Provider type: Clinical neuropsychologist - Source of the listing data: CMS NPI Registry, retrieved 2026-10-03, public, free ## Questions ### Where is MARK SANDBERG? MARK SANDBERG is at 200 BELLE TERRE RD, PORT JEFFERSON, NY, 117771928. ### How do I contact MARK SANDBERG? To contact MARK SANDBERG, call 631-474-6000. ### Is MARK SANDBERG 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=1831191709), 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 PORT JEFFERSON]() - [Clinical neuropsychologists in PORT JEFFERSON]() - [More ADHD evaluation providers in PORT JEFFERSON]()