Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Birch Haven Psychological Associates, P.L.L.C.

Clinical Psychologist in Somersworth, NH · enumerated 2023 · authorized official Alfred-John Diamonti, Owner.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1558145839

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Registry record

Entity type Organization (Type 2)

Legal business name Birch Haven Psychological Associates, P.L.L.C.

Practice address 472 High St Ste 300, Somersworth, NH, 03878

Phone (978) 482-7571

Enumeration date Aug 21, 2023

Last updated in NPPES Apr 16, 2025

Taxonomy & classification

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers Primary

103TC1900X Counseling Psychologist Behavioral Health & Social Service Providers Secondary

Authorized official

Name Alfred-John Diamonti

Title Owner

Phone (978) 254-1165

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2025-04-16. Verify at npiregistry.cms.hhs.gov.

Where is Birch Haven Psychological Associates, P.L.L.C. located?

The practice location on file with NPPES is in Somersworth, NH.

Providers at this address

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Alfred-John Diamonti Clinical Psychologist · Somersworth, NH NPI 1639818784

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-04-16.