NPI age
19 years
Enumerated 2007-04-17
● Active
Type 1 · Individual
Vivienne Yoon, M.D.
Yoon is 1 of 7 internal medicine providers in McKinney and 1 of 935 in Texas.
Primary specialty
Internal Medicine
Plus 1 subspecialty
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2023-01-16
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 935 active internal medicine providers in Texas.
NPI age
19 years
≈ at median (18 yr)
State licenses
1 state
15% of peers hold multiple states
Subspecialties
0
38% of peers hold subspecialties
NPI lifetime · 2007 → 2026
2007-04Enumerated in NPPES
2007
2026
Where they practice
Practice location
5236 W University Dr, Suite 2200
McKinney, TX 750717889
Mailing address
5236 W University Dr, Suite 2200
McKinney, TX 750717889
Specialties
-
Internal Medicine PrimaryAn internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary...
Identifiers
| Type | Value | Notes |
|---|---|---|
| 05 (TX) | 305622801 |
Practice context
Part of a multi-provider practice. 21 other active providers share this practice address in NPPES.
Provyx · Custom healthcare lists
Need all 935 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.