# JOHN LARGEN AND ASSOCIATES, INC. JOHN LARGEN AND ASSOCIATES, INC. is an ADHD evaluation provider with an address in HOUSTON, TX, United States. ## Details - Address: 1020 HOLCOMBE BLVD STE 1304, HOUSTON, TX, 770302210 - Phone: [713-799-2818]() - National Provider Identifier (NPI): 1336133578 - Provider type: Clinical neuropsychologist - Source of the listing data: CMS NPI Registry, retrieved 2026-10-03, public, free ## Questions ### Where is JOHN LARGEN AND ASSOCIATES, INC.? JOHN LARGEN AND ASSOCIATES, INC. is at 1020 HOLCOMBE BLVD STE 1304, HOUSTON, TX, 770302210. ### How do I contact JOHN LARGEN AND ASSOCIATES, INC.? To contact JOHN LARGEN AND ASSOCIATES, INC., call 713-799-2818. ### Is JOHN LARGEN AND ASSOCIATES, INC. 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=1336133578), 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 HOUSTON]() - [Clinical neuropsychologists in HOUSTON]() - [More ADHD evaluation providers in HOUSTON]()