NPI age
19 years
Enumerated 2006-06-28
● Active
Type 1 · Individual
MR. Michael Eugene Callahan, PA-C
Callahan is 1 of 29 internal medicine providers in Decatur and 1 of 643 in Georgia.
Primary specialty
Internal Medicine
Plus 1 subspecialty
Licensed in
GA
1 state
Status
Active
No deactivations on record
Last NPPES update
2025-09-11
Source: monthly bulk 2026-05
Sole proprietor
Yes
Solo practice on file
How this provider compares
Across 643 active internal medicine providers in Georgia.
NPI age
19 years
≈ at median (19 yr)
State licenses
1 state
19% of peers hold multiple states
Subspecialties
1
In the 30% of peers with subspecialties
NPI lifetime · 2006 → 2026
2006-06Enumerated in NPPES
2006
2026
Where they practice
Practice location
1670 Clairmont Rd, Atlanta Va Medical Center
Decatur, GA 300334004
Mailing address
3220 Francine Dr
Decatur, GA 300333358
Specialties
-
Internal Medicine PrimaryAn internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and...
-
Physician AssistantDefinition to come...
Practice context
Part of a multi-provider practice. 1009 other active providers share this practice address in NPPES.
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- Confirm the NPI on NPPES.The CMS registry is the system of record. Open NPPES →
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