Donald Walker, MD
NPI 1669664033 · Diagnostic Radiology Physician · Knoxville, TN
Enrolled with Medicare as Practitioner - Interventional Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Donald Walker, MD is a Diagnostic Radiology Physician provider in Knoxville, TN (NPI 1669664033).
Provider details
- NPI number
- 1669664033
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- E-10787 (AR)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
18 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
2,372 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) |
|---|---|---|
| X-Ray of Chest, 1 View71045 | 399 | $8 |
| X-Ray of Chest, 2 Views71046 | 216 | $10 |
| Use of a Drug to Induce Depression of Consciousness By Physician Performing a Procedure (5 Years Or Older), Initial 15 Minutes99152 | 204 | $11 |
| Ct Scan of Blood Vessels of Chest With Contrast71275 | 122 | $78 |
| X-Ray of Chest, 2 Views71046 | 112 | $10 |
| Ct Scan Head Or Brain Without Contrast70450 | 107 | $36 |
| Ct Scan of Abdomen and Pelvis With Contrast |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$392 across 8 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
- 2007-08-09
- Last updated
- 2022-10-31
- Certified
- 2022-10-31
Frequently asked questions
- What is Donald Walker's NPI number?
- Donald Walker's National Provider Identifier (NPI) is 1669664033, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Donald Walker's specialty?
- Donald Walker is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Donald Walker located?
- Donald Walker's practice location on file with NPPES is 1924 Alcoa Hwy # U107, Knoxville, TN 37920-1511.
- What is Donald Walker's phone number?
- The practice phone number listed in the NPPES registry for Donald Walker is (865) 305-9661.
- Does Donald Walker accept Medicare?
- Donald Walker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Donald Walker's NPI active?
- Yes — Donald Walker's NPI (1669664033) is active in the NPPES registry as of the last update on 2022-10-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.