NPI age
19 years
Enumerated 2006-11-15
● Active
Type 1 · Individual
DR. Mark Winston Smith, M.D.
Smith is 1 of 12 internal medicine providers in Texarkana and 1 of 1318 in Texas.
Primary specialty
Internal Medicine
Plus 2 subspecialties
Licensed in
TX, CA
2 states
Status
Active
No deactivations on record
Last NPPES update
2025-01-21
Source: monthly bulk 2026-05
Sole proprietor
Yes
Solo practice on file
How this provider compares
Across 1318 active internal medicine providers in Texas.
NPI age
19 years
≈ at median (18 yr)
State licenses
2 states
Top 84% — 15% of peers are multi-state
Subspecialties
2
In the 57% of peers with subspecialties
NPI lifetime · 2006 → 2026
2006-11Enumerated in NPPES
2006
2026
Where they practice
Practice location
2602 Saint Michael Dr Ste 400
Texarkana, TX 75503
Mailing address
2900 Saint Michael Dr Ste 401
Texarkana, TX 755035211
Additional practice locations
4 secondary locations on file with NPPES.
Location 2
401 S Fair Oaks Ave
Pasadena, CA 911052603
Location 3
619 S Fleishel Ave Ste 100
Tyler, TX 757012004
Location 4
600 Elizabeth St
Corpus Christi, TX 784042235
Location 5
800 E Dawson St
Tyler, TX 757012036
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...
-
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 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...
Practice context
Part of a multi-provider practice. 5 other active providers share this practice address in NPPES.
Provyx · Custom healthcare lists
Need all 1318 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.