NPI Portal NPI Lookup & Verification

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

Dr. Mark Richard Treegoob, PH.D.

Psychologist in Glendale, AZ · enumerated 2005.

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

National Provider Identifier

1144214289

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Registry record

Entity type Individual (Type 1)
Name Dr. Mark Richard Treegoob
Credential PH.D.
Sex Male
Practice address Glendale, AZ, 85308
Phone (602) 843-5484
Fax (602) 843-5498
Enumeration date Sep 5, 2005
Last updated in NPPES Oct 20, 2022

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

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License 629 (AZ) 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
731358 Medicaid AZ -

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 1144214289 active?
Yes, as of the latest NPPES snapshot, NPI 1144214289 is active (record last updated 2022-10-20).
How do I verify Mark Treegoob's NPI record?
Cross-check NPI 1144214289 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 2022-10-20.