John Johnston, MD
NPI 1417982752 · Diagnostic Radiology Physician · Nashville, TN
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Johnston, MD is a Diagnostic Radiology Physician provider in Nashville, TN (NPI 1417982752).
Provider details
- NPI number
- 1417982752
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 18143 (TN)
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
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,736 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 | 262 | $8 |
| Screening 3d Breast Mammography77063 | 195 | $47 |
| Screening Mammography77067 | 193 | $114 |
| Mri Scan of Lower Spinal Canal Without Contrast72148 | 151 | $174 |
| Dxa Bone Density Measurement of Hip, Pelvis, Spine77080 | 106 | $34 |
| X-Ray of Chest, 2 Views71046 | 70 | $10 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$14 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
Additional practice locations (2)
- 1710 Gunbarrel RdChattanooga, TN 37421-3127Phone: (423) 553-1220Fax: (423) 553-1231
- 1710 Gunbarrel RdChattanooga, TN 37421-3127Phone: (423) 553-1220Fax: (423) 553-1231
Registry dates
- Enumerated
- 2006-07-12
- Last updated
- 2021-03-03
- Certified
- 2021-03-03
Frequently asked questions
- What is John Johnston's NPI number?
- John Johnston's National Provider Identifier (NPI) is 1417982752, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Johnston's specialty?
- John Johnston is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is John Johnston located?
- John Johnston's practice location on file with NPPES is 210 25th Ave N Ste 1204, Nashville, TN 37203-1620.
- What is John Johnston's phone number?
- The practice phone number listed in the NPPES registry for John Johnston is (615) 312-0600.
- Does John Johnston accept Medicare?
- John Johnston is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Johnston's NPI active?
- Yes — John Johnston's NPI (1417982752) is active in the NPPES registry as of the last update on 2021-03-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.