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

Dr. William Richard Dinneen, PH.D.

Clinical Psychologist in New York, NY · enumerated 2007.

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

National Provider Identifier

1356407472

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Registry record

Entity type Individual (Type 1)

Name Dr. William Richard Dinneen

Credential PH.D.

Sex Male

Practice address New York, NY, 10024

Phone (917) 612-9064

Enumeration date Jan 1, 2007

Last updated in NPPES Apr 9, 2013

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 013583 (NY) Primary

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
7336315	Other	NY	GHI
6134765	Other	NY	UHC UNITED BEHVRL HEALTH
01948741	Medicaid	NY	-
239348	Other	NY	MHN
VL888	Other	NY	MAGELLAN EMPIRE BLCRBLSH
7766386	Other	NY	AETNA
P2559606	Other	NY	OXFORD
112105	Other	NY	VALUE OPTIONS
345814000	Other	NY	MAGELLAN EMPIRE BLCRBLSH

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 do I verify William Dinneen's NPI record?

Cross-check NPI 1356407472 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1356407472 active?

Yes, as of the latest NPPES snapshot, NPI 1356407472 is active (record last updated 2013-04-09).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-04-09.