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

Diane W. Cornsweet, PH.D.

Professional Counselor in Prescott, AZ · enumerated 2006 · practices at Jeff Henderson Phd Psychological Services and Consulting PC.

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

National Provider Identifier

1588673859

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Registry record

Entity type Individual (Type 1)
Name Diane W. Cornsweet
Credential PH.D.
Sex Female
Practice address Prescott, AZ, 86305
Phone (928) 443-0661
Fax (928) 445-2919
Enumeration date Aug 5, 2006
Last updated in NPPES Jul 8, 2007

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

Taxonomy & licenses

101YP2500X Professional Counselor Behavioral Health & Social Service Providers · License LPC1294 (AZ) Primary
PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

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

Is NPI 1588673859 active?
Yes, as of the latest NPPES snapshot, NPI 1588673859 is active (record last updated 2007-07-08).
How do I verify Diane Cornsweet's NPI record?
Cross-check NPI 1588673859 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.