NPI age
20 years
Enumerated 2006-02-14
● Active
Type 1 · Individual
John D Grattan-Smith, MD
Grattan-Smith is 1 of 103 radiology providers in Marietta and 1 of 1280 in Georgia.
Primary specialty
Radiology
Plus 2 subspecialties
Licensed in
GA, TN
2 states
Status
Active
No deactivations on record
Last NPPES update
2024-01-12
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 1280 active radiology providers in Georgia.
NPI age
20 years
≈ at median (19 yr)
State licenses
2 states
Top 78% — 21% of peers are multi-state
Subspecialties
1
In the 38% of peers with subspecialties
NPI lifetime · 2006 → 2026
2006-02Enumerated in NPPES
2006
2026
Where they practice
Practice location
790 Church St Ne Ste 400
Marietta, GA 300608957
Mailing address
Po Box 3157
Indianapolis, IN 462063157
Additional practice locations
2 secondary locations on file with NPPES.
Location 2
262 Danny Thomas Pl
Memphis, TN 381053678
Location 3
1001 Johnson Ferry Rd Ne
Atlanta, GA 303421605
Specialties
-
Radiology PrimaryA radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.
-
RadiologyA radiologist who is proficient in all forms of diagnostic imaging as it pertains to the treatment of diseases in the newborn, infant, child and adolescent. This specialist has knowledge of both imaging and interventional procedures...
Identifiers
| Type | Value | Notes |
|---|---|---|
| 05 (GA) | 000615733 |
Multi-state credentialing: Licensed in 2 states. Useful context for credentialers building cross-state provider networks.
Practice context
Part of a multi-provider practice. 68 other active providers share this practice address in NPPES.
Recently enumerated nearby: 3 new radiology providers have been added in Marietta in the last 180 days.
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- Confirm the NPI on NPPES.The CMS registry is the system of record. Open NPPES →
- Check the state license is currently active.State licensing boards publish current status; NPPES does not.
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