# HARALD LETTNER HARALD LETTNER is an ADHD evaluation provider with an address in NAPLES, FL, United States. ## Details - Address: 501 GOODLETTE RD N STE C 104, NAPLES, FL, 341025661 - Phone: [239-434-6111]() - National Provider Identifier (NPI): 1063523678 - Credentials: PHD - Provider type: Clinical neuropsychologist - Source of the listing data: CMS NPI Registry, retrieved 2026-10-03, public, free ## Questions ### Where is HARALD LETTNER? HARALD LETTNER is at 501 GOODLETTE RD N STE C 104, NAPLES, FL, 341025661. ### How do I contact HARALD LETTNER? To contact HARALD LETTNER, call 239-434-6111. ### Is HARALD LETTNER 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=1063523678), 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 NAPLES]() - [Clinical neuropsychologists in NAPLES]() - [More ADHD evaluation providers in NAPLES]()