Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

James Whittenburg Walker Jr., MD

Internal Medicine Physician in Amarillo, TX · enumerated 2005.

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

National Provider Identifier

1144205568

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Registry record

Entity type Individual (Type 1)

Name James Whittenburg Walker Jr.

Credential MD

Sex Male

Practice address 1400 S Coulter St, Amarillo, TX, 79106

Phone (806) 414-9100

Fax (806) 354-5717

Enumeration date Dec 8, 2005

Last updated in NPPES Jun 2, 2025

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License H9584 (TX) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
200347260 A	Medicaid	OK	-
P089K7726	Medicaid	TX	-
132290108	Medicaid	TX	-
132290109	Medicaid	TX	-
64971589	Medicaid	NM	-

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

How do I verify James Walker's NPI record?

Cross-check NPI 1144205568 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1144205568 active?

Yes, as of the latest NPPES snapshot, NPI 1144205568 is active (record last updated 2025-06-02).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-06-02.