Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

James Whittenburg Walker Jr., MD

Individual provider Internal Medicine Physician · NPI 1144205568

James Whittenburg Walker Jr., MD is an Internal Medicine in Amarillo, Texas. Graduated from University of Texas Southwestern Medical School at Dallas in 1990, 36 years ago. Practices with Texas Tech University Health Sciences Center Amarillo, a 74-clinician group and accepts Medicare assignment. Licensed in Texas.

Years since qualifying
36
Trained at
University of Texas Southwestern Medical School at Dallas
Licensed in
TX
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1400 S Coulter St
Amarillo, TX 79106-1786
Phone: (806) 414-9100
Fax: (806) 354-5717
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence H9584 (TX)

Record details

NPI number1144205568
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 8, 2005
Last updated in NPPESJune 2, 2025
Certification dateJune 2, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF TEXAS SOUTHWESTERN MEDICAL SCHOOL AT DALLAS
Graduated 1990 (36 years in practice)
Group practice Texas Tech University Health Sciences Center Amarillo — 74 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Amarillo