NPI age
15 years
Enumerated 2010-09-08
● Active Type 2 · Organization
Mark A. Clothier, M.d., P.A.
Mark A. Clothier, M.d., P.A. is 1 of 12343 internal medicine organizations in Texas.
Primary specialty
Internal Medicine
Practice locations
1
0 secondary on file
Status
Active
No deactivations on record
Authorized official
Clothier
President
Last NPPES update
2013-05-22
Source: monthly bulk 2026-05
How this organization compares
Across 12343 active internal medicine providers in Texas.
NPI age
15 years
↓ 2 yr below median
Practice locations
1
0 secondary on file
Subspecialties
0
NPI lifetime · 2010 → 2026
2010-09Enumerated in NPPES
2010
2026
Where they practice
Primary practice location
600 E Coke Rd
Winnsboro, TX 754943418
Mailing address
600 E Coke Rd
Winnsboro, TX 754943418
Authorized official
Mark A. Clothier, M.D.
President
📞 9033423651
Individual providers at this organization
2 individual providers on file at this primary practice address.
- Jennifer Flowers, FNP-BC Nurse Practitioner NPI 1447707039
- Terry Sampson, NP Nurse Practitioner NPI 1093079279
Specialties
-
Internal Medicine PrimaryA 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,...
Identifiers
| Type | Value | Notes |
|---|---|---|
| 05 (TX) | 005445801 | |
| 01 (TX) | 060004887 | RAILROAD MEDICARE |
Practice context
Multi-provider organization. 2 individual providers on file at this primary address.
Provyx · Custom healthcare lists
Need all 12343 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 organization
- Confirm the NPI on NPPES.The CMS registry is the system of record. Open NPPES →
- Verify the organization is in good standing.Cross-check with the state's business registration and any applicable licensing boards.
- Confirm payer enrollment if billing.NPI presence does not guarantee active enrollment with Medicare, Medicaid, or commercial payers.