Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Nunn, PHD, HSPP

Clinical Psychologist in Greencastle, IN · enumerated 2006.

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

National Provider Identifier

1689625832

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Registry record

Entity type Individual (Type 1)

Name William Nunn

Credential PHD, HSPP

Sex Male

Practice address 239 Hillsdale Ave, Greencastle, IN, 46135

Phone (765) 653-1024

Fax (765) 653-4931

Enumeration date May 12, 2006

Last updated in NPPES Mar 15, 2011

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 20041024 (IN) 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
200067860	Medicaid	IN	-

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 Nunn's NPI record?

Cross-check NPI 1689625832 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1689625832 active?

Yes, as of the latest NPPES snapshot, NPI 1689625832 is active (record last updated 2011-03-15).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-03-15.