NPI age
20 years
Enumerated 2006-01-30
● Active
Type 1 · Individual
Nadine K. Johnson-Giannopoulos, M.D.
Johnson-Giannopoulos is 1 of 135 internal medicine providers in Dallas and 1 of 1069 in Texas.
Primary specialty
Internal Medicine
Plus 1 subspecialty
Licensed in
KS, MO
2 states
Status
Active
No deactivations on record
Last NPPES update
2016-03-15
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 1069 active internal medicine providers in Texas.
NPI age
20 years
↑ 2 yr above median (18 yr)
State licenses
2 states
Top 77% — 22% of peers are multi-state
Subspecialties
0
52% of peers hold subspecialties
NPI lifetime · 2006 → 2026
2006-01Enumerated in NPPES
2006
2026
Where they practice
Practice location
818 Clermont St
Dallas, TX 752231214
Mailing address
818 Clermont St
Dallas, TX 752231214
Specialties
-
Internal Medicine PrimaryAn internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine...
Practice context
Solo or small practice. No other active providers share this practice address in NPPES.
Provyx · Custom healthcare lists
Need all 1069 Internal Medicine providers in Texas?
Get the full list as a CSV with verified work emails, direct phones, and LinkedIn URLs.
Request a quote →How to verify this provider
- 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.