NPI age
16 years
Enumerated 2010-05-28
● Active
Type 1 · Individual
DR. Thien An Nguyen, M.D.
Nguyen is 1 of 4 internal medicine providers in Katy and 1 of 479 in Texas.
Primary specialty
Internal Medicine
Plus 2 subspecialties
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2024-08-12
Source: monthly bulk 2026-05
Sole proprietor
Yes
Solo practice on file
How this provider compares
Across 479 active internal medicine providers in Texas.
NPI age
16 years
≈ at median (16 yr)
State licenses
1 state
32% of peers hold multiple states
Subspecialties
2
In the 79% of peers with subspecialties
NPI lifetime · 2010 → 2026
2010-05Enumerated in NPPES
2010
2026
Where they practice
Practice location
Po Box 475
Katy, TX 774920475
Mailing address
Po Box 475
Katy, TX 774920475
Additional practice locations
2 secondary locations on file with NPPES.
Location 2
1401 St Joseph Pkwy
Houston, TX 770028301
Location 3
600 Elizabeth St
Corpus Christi, TX 784042235
Specialties
-
Internal Medicine PrimaryAn internist who diagnoses, treats and supports patients with multiple organ dysfunction. This specialist may have administrative responsibilities for intensive care units and may also facilitate and coordinate patient care among the...
-
Internal MedicineA 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,...
-
Internal MedicineAn internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex...
Practice context
Solo or small practice. No other active providers share this practice address in NPPES. This provider is listed as a sole proprietor.
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