NPI age
14 years
Enumerated 2012-03-20
● Active
Type 1 · Individual
Katherine Ann Gielissen, MD
Gielissen is 1 of 1034 internal medicine providers in Atlanta and 1 of 5027 in Georgia.
Primary specialty
Internal Medicine
Plus 3 subspecialties
Licensed in
GA, CT
2 states
Status
Active
No deactivations on record
Last NPPES update
2023-07-13
Source: monthly bulk 2026-05
Sole proprietor
Yes
Solo practice on file
How this provider compares
Across 5027 active internal medicine providers in Georgia.
NPI age
14 years
↓ 4 yr below median (18 yr)
State licenses
2 states
Top 89% — 10% of peers are multi-state
Subspecialties
1
In the 32% of peers with subspecialties
NPI lifetime · 2012 → 2026
2012-03Enumerated in NPPES
2012
2026
Where they practice
Practice location
80 Jesse Hill JR Dr Se
Atlanta, GA 303033050
Mailing address
80 Jesse Hill JR Dr Se
Atlanta, GA 303033050
Additional practice locations
1 secondary location on file with NPPES.
Location 2
1405 Clifton Rd Ne
Atlanta, GA 303223220
Specialties
-
Internal Medicine PrimaryA physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer,...
-
PediatricsA pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment...
Practice context
Part of a multi-provider practice. 851 other active providers share this practice address in NPPES.
Recently enumerated nearby: 7 new internal medicine providers have been added in Atlanta 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.
- Confirm payer enrollment if billing.NPI presence does not guarantee active enrollment with Medicare, Medicaid, or commercial payers.