NPI age
18 years
Enumerated 2007-07-23
● Active
Type 1 · Individual
Diane Nguyen, MD
Nguyen is 1 of 179 internal medicine providers in Dallas and 1 of 1807 in Texas.
Primary specialty
Internal Medicine
Plus 3 subspecialties
Licensed in
TX, MI
2 states
Status
Active
No deactivations on record
Last NPPES update
2019-02-14
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 1807 active internal medicine providers in Texas.
NPI age
18 years
≈ at median (19 yr)
State licenses
2 states
Top 83% — 17% of peers are multi-state
Subspecialties
2
In the 35% of peers with subspecialties
NPI lifetime · 2007 → 2026
2007-07Enumerated in NPPES
2007
2026
Where they practice
Practice location
5323 Harry Hines Blvd
Dallas, TX 753909257
Mailing address
Po Box 845347
Dallas, TX 752847208
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...
-
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,...
-
Student in an Organized Health Care Education/Training ProgramAn individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensure to provide health care.
Identifiers
| Type | Value | Notes |
|---|---|---|
| 05 (TX) | 346359801 | |
| 01 (TX) | 415654YL7A | MEDICARE - OTHER |
| 01 (TX) | 415654YL7B | MEDICARE - DALLAS |
| 01 (TX) | 415654YNGS | MEDICARE - TARRANT |
Multi-state credentialing: Licensed in 2 states. Useful context for credentialers building cross-state provider networks.
Practice context
Part of a multi-provider practice. 4085 other active providers share this practice address in NPPES.
Recently enumerated nearby: 2 new internal medicine providers have been added in Dallas in the last 180 days.
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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.