James Walker, MD
NPI 1144205568 · Internal Medicine Physician · Amarillo, TX
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Walker, MD is a Internal Medicine Physician provider in Amarillo, TX (NPI 1144205568).
Provider details
- NPI number
- 1144205568
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- H9584 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
424 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 115 | $80 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 111 | $128 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 60 | $92 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 46 | $82 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 38 | $120 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 55 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 146 | 46 |
| Levothyroxine Sodium | 141 | 32 |
| Lisinopril | 119 | 30 |
| Metformin Hcl | 64 | 15 |
| Furosemide | 55 | 15 |
| Pantoprazole Sodium | 50 | 13 |
| Amlodipine Besylate | 50 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$152 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-12-08
- Last updated
- 2025-06-02
- Certified
- 2025-06-02
Frequently asked questions
- What is James Walker's NPI number?
- James Walker's National Provider Identifier (NPI) is 1144205568, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Walker's specialty?
- James Walker is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is James Walker located?
- James Walker's practice location on file with NPPES is 1400 S Coulter St, Amarillo, TX 79106-1786.
- What is James Walker's phone number?
- The practice phone number listed in the NPPES registry for James Walker is (806) 414-9100.
- Does James Walker accept Medicare?
- James Walker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Walker's NPI active?
- Yes — James Walker's NPI (1144205568) is active in the NPPES registry as of the last update on 2025-06-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.