NPI Portal NPI Lookup & Verification

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

Dr. Stuart Joel Nathan, PH.D.

Psychologist in Houston, TX · enumerated 2005.

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

National Provider Identifier

1700883626

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Registry record

Entity type Individual (Type 1)
Name Dr. Stuart Joel Nathan
Credential PH.D.
Sex Male
Practice address Houston, TX, 77063
Phone (713) 789-7560
Fax (713) 789-7351
Enumeration date Jul 7, 2005
Last updated in NPPES Jul 12, 2010

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 23367 (TX) Secondary
103T00000X Psychologist Behavioral Health & Social Service Providers · License 23367 (TX) 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
032002004 Medicaid TX -
23367 Other TX MOLINA/COMPCARE
23367 Other TX TRICARE
4526527 Other TX AETNA
146554401 Medicaid TX -
23367 Other TX LIFESYNCH HUMANA
23367 Other TX MAGELLAN
23367 Other TX APS
23367 Other TX MHN
23367 Other TX MULTIPLAN/PHCS
23367 Other TX RENNASCIANCE
23367 Other TX UBH
680001954 Other TX RR MEDICARE
00B06A Other TX BCBS
026280 Other TX VALUE OPTIONS
10019555 Other TX AMERIGROUP
23367 Other TX GREAT WEST
23367 Other TX ONE HEALTH
23367 Other TX TEXAS TRUE CHOICE
23367 Other TX CIGNA

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

What specialty is Stuart Nathan?
Stuart Nathan is registered in NPPES with the primary taxonomy of Psychologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-07-12.