Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Irwin Mansdorf, PH.D.

Clinical Psychologist in Flushing, NY · enumerated 2006.

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

National Provider Identifier

1598793184

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Registry record

Entity type Individual (Type 1)

Name Irwin Mansdorf

Credential PH.D.

Sex Male

Practice address Flushing, NY, 11367

Phone (718) 809-6871

Fax (718) 809-6871

Enumeration date Jun 30, 2006

Last updated in NPPES Sep 7, 2016

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 005396 (NY) Primary

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 4588 (NC) Secondary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

Other identifiers

Identifier	Type	State	Issuer
0340EY	Other	-	GHI MEDICARE
00991497	Medicaid	NY	-

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

How do I verify Irwin Mansdorf's NPI record?

Cross-check NPI 1598793184 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1598793184 active?

Yes, as of the latest NPPES snapshot, NPI 1598793184 is active (record last updated 2016-09-07).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-09-07.