NPI age
10 years
Enumerated 2015-06-08
● Active
Type 1 · Individual
DR. John Vassaur, M.D.
Vassaur is 1 of 157 internal medicine providers in Dallas and 1 of 1318 in Texas.
Primary specialty
Internal Medicine
Plus 1 subspecialty
Licensed in
TX, MA
2 states
Status
Active
No deactivations on record
Last NPPES update
2023-04-27
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 1318 active internal medicine providers in Texas.
NPI age
10 years
↓ 8 yr below median (18 yr)
State licenses
2 states
Top 84% — 15% of peers are multi-state
Subspecialties
1
In the 57% of peers with subspecialties
NPI lifetime · 2015 → 2026
2015-06Enumerated in NPPES
2015
2026
Where they practice
Practice location
3600 Gaston Ave Ste 960
Dallas, TX 752461909
Mailing address
12800 Webb Chapel Rd
Farmers Branch, TX 752346445
Specialties
-
Internal Medicine PrimaryAn 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...
-
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.
Practice context
Part of a multi-provider practice. 7 other active providers share this practice address in NPPES.
Recently enumerated nearby: 1 new internal medicine provider has been added in Dallas in the last 180 days.
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- 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.