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Internal Medicine

James W. Walker Jr., MD

Works at hospitals in Amarillo, TX · Texas

Summary

Dr. James W. Walker Jr., MD is an internal medicine doctor at 1400 S Coulter St, Amarillo, TX 79106. Phone: (806) 414-9608. Accepts Medicare assignment. In 2024, James W. Walker Jr. had 210 Original Medicare patients and 534 services. NPI 1144205568. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Internal medicine doctor (Medicare lists Internal Medicine)
  • Address: 1400 S Coulter St, Amarillo, TX 79106 · Directions
  • Phone: (806) 414‑9608
  • Medicare: Accepts Medicare assignment
  • Hospitals: BSA Hospital, Northwest Texas Hospital
  • Group practice: Texas Tech University Health Sciences Center Amarillo
  • Medical school: University Of Texas Southwestern Medical School At Dallas · graduated 1990 (36 years since medical school)
  • Gender (as listed): Male
  • Telehealth: offered

From official Medicare data

This page shows what Medicare's official clinician data says about James W. Walker Jr., joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does James W. Walker Jr. accept Medicare assignment?
Yes. Medicare's clinician data says James W. Walker Jr. accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does James W. Walker Jr. see?
In 2024, CMS data shows 210 Original Medicare patients and 534 services for James W. Walker Jr.. This counts Original Medicare only and measures volume, not quality.
What is James W. Walker Jr.'s NPI number?
1144205568. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for James W. Walker Jr., data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients210
Services billed to Medicare534
Different services or procedures30
Participating Medicare providerYes
Average age of these patients73

Most frequent services

  1. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)115 services
  2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)111 services
  3. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)60 services
  4. Hospital discharge day management, 30 minutes or less (99238)46 services
  5. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)38 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High blood pressure75%
  • High cholesterol74%
  • Diabetes50%
  • Arthritis46%
  • Ischemic heart disease40%
  • Chronic kidney disease36%

Hospitals where James W. Walker Jr. works

Medicare's Facility Affiliation Data lists James W. Walker Jr. at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

  • BSA HospitalAmarillo, TX · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 450231
  • Northwest Texas HospitalAmarillo, TX · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 450209

Practice locations

Addresses where James W. Walker Jr. is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists James W. Walker Jr. as a member of this group (CMS data updated October 2, 2026).

  • Texas Tech University Health Sciences Center Amarillo76 clinicians in the group

Specialties

Find other Internal Medicine doctors in Texas →

Other internal medicine doctors in Amarillo

Clinicians with the same Medicare primary specialty in Amarillo, TX — not a recommendation.

All internal medicine doctors in Amarillo →

Other clinicians in Texas Tech University Health Sciences Center Amarillo

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Medical schoolUniversity Of Texas Southwestern Medical School At Dallas
Graduation year1990 (36 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1144205568
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians