Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Derek Alan Mckay, PH.D.

Clinical Psychologist in Meadville, PA · enumerated 2019.

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

National Provider Identifier

1578128211

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Registry record

Entity type Individual (Type 1)

Name Dr. Derek Alan Mckay

Credential PH.D.

Sex Male

Practice address 640 Alden St, Meadville, PA, 16335

Phone (814) 373-5266

Fax (814) 373-5269

Enumeration date May 8, 2019

Last updated in NPPES Oct 7, 2019

Taxonomy & licenses

103G00000X Clinical Neuropsychologist Behavioral Health & Social Service Providers Secondary

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 0810005966 (VA) Secondary

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License PS018771 (PA) 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 1578128211 active?

Yes, as of the latest NPPES snapshot, NPI 1578128211 is active (record last updated 2019-10-07).

How do I verify Derek Mckay's NPI record?

Cross-check NPI 1578128211 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 2019-10-07.