NPI age
19 years
Enumerated 2007-04-16
● Active
Type 1 · Individual
Diane Duyen T Nguyen, DO
Nguyen is 1 of 8 internal medicine providers in McAllen and 1 of 576 in Texas.
Primary specialty
Internal Medicine
Plus 2 subspecialties
Licensed in
TX, TN
2 states
Status
Active
No deactivations on record
Last NPPES update
2024-10-03
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 576 active internal medicine providers in Texas.
NPI age
19 years
≈ at median (19 yr)
State licenses
2 states
Top 81% — 18% of peers are multi-state
Subspecialties
1
In the 46% of peers with subspecialties
NPI lifetime · 2007 → 2026
2007-04Enumerated in NPPES
2007
2026
Where they practice
Practice location
205 E Toronto Ave
McAllen, TX 785031209
Mailing address
Po Box 531968
Harlingen, TX 785531968
Additional practice locations
2 secondary locations on file with NPPES.
Location 2
602 Indiana Ave
Lubbock, TX 794153364
Location 3
27700 Northwest Fwy Ste 580
Cypress, TX 774336766
Specialties
-
Internal Medicine PrimaryAn internist who specializes in the diagnosis and treatment of all types of cancer and other benign and malignant tumors. This specialist decides on and administers therapy for these malignancies as well as consults with surgeons and...
-
Internal MedicineAn 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...
Identifiers
| Type | Value | Notes |
|---|---|---|
| 01 (TN) | 4155051 | BCBS OF TN |
Multi-state credentialing: Licensed in 2 states. Useful context for credentialers building cross-state provider networks.
Practice context
Part of a multi-provider practice. 60 other active providers share this practice address in NPPES.
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