John Stallworth, M.D.
NPI 1669531836 · Diagnostic Radiology Physician · Knoxville, TN
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Stallworth, M.D. is a Diagnostic Radiology Physician provider in Knoxville, TN (NPI 1669531836).
Provider details
- NPI number
- 1669531836
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 27487 (TN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 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
3,936 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) |
|---|---|---|
| Screening Mammography77067 | 366 | $115 |
| X-Ray of Chest, 1 View71045 | 311 | $8 |
| Screening 3d Breast Mammography77063 | 279 | $47 |
| Ct Scan Head Or Brain Without Contrast70450 | 236 | $36 |
| Screening Mammography77067 | 173 | $33 |
| Ct Scan of Abdomen and Pelvis Without Contrast74176 | 161 | $76 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$13 across 1 record (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
- 2006-12-06
- Last updated
- 2026-03-30
- Certified
- 2026-03-30
Frequently asked questions
- What is John Stallworth's NPI number?
- John Stallworth's National Provider Identifier (NPI) is 1669531836, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Stallworth's specialty?
- John Stallworth is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is John Stallworth located?
- John Stallworth's practice location on file with NPPES is 4820 Old Kingston Pike, Knoxville, TN 37919-6424.
- What is John Stallworth's phone number?
- The practice phone number listed in the NPPES registry for John Stallworth is (865) 558-9862.
- Does John Stallworth accept Medicare?
- John Stallworth is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Stallworth's NPI active?
- Yes — John Stallworth's NPI (1669531836) is active in the NPPES registry as of the last update on 2026-03-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.