Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

David Kalkstein MD Phd and Associates

Clinical Social Worker in Wilmington, DE · enumerated 2007 · authorized official David Kalkstein, Director.

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

National Provider Identifier

1326259649

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Registry record

Entity type Organization (Type 2)

Legal business name David Kalkstein MD Phd and Associates

Practice address 3411 Silverside Rd, Hagley Bldg Ste 102, Wilmington, DE, 19810

Phone (302) 778-1288

Fax (302) 478-9393

Enumeration date May 25, 2007

Last updated in NPPES Aug 22, 2020

Taxonomy & classification

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License Q1-0000873 (DE) Primary

Authorized official

Name David Kalkstein

Title Director

Phone (302) 778-1288

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What type of organization is David Kalkstein MD Phd and Associates?

David Kalkstein MD Phd and Associates is registered in NPPES as a Clinical Social Worker (its primary provider taxonomy).

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.