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

Dr. Tammy Lynn Jackson, PH.D.

Adult Development & Aging Psychologist in College Station, TX · enumerated 2005.

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

National Provider Identifier

1619958758

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Registry record

Entity type Individual (Type 1)

Name Dr. Tammy Lynn Jackson

Credential PH.D.

Sex Female

Practice address College Station, TX, 77845

Phone (979) 217-1311

Fax (855) 604-0969

Enumeration date Nov 7, 2005

Last updated in NPPES Aug 25, 2023

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

Taxonomy & licenses

103TB0200X Cognitive & Behavioral Psychologist Behavioral Health & Social Service Providers · License 31418 (TX) Secondary

103TC1900X Counseling Psychologist Behavioral Health & Social Service Providers Secondary

103TA0700X Adult Development & Aging Psychologist Behavioral Health & Social Service Providers · License 31418 (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
158249604	Medicaid	TX	-

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Tammy Jackson?

Tammy Jackson is registered in NPPES with the primary taxonomy of Adult Development & Aging 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.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-08-25.