NPI age
20 years
Enumerated 2005-09-23
● Active
Type 1 · Individual
James T Siminski, M.D.
Siminski is 1 of 3 internal medicine providers in Hurst and 1 of 1318 in Texas.
Primary specialty
Internal Medicine
Plus 4 subspecialties
Licensed in
TX, OK, IL
3 states
Status
Active
No deactivations on record
Last NPPES update
2025-05-20
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
20 years
↑ 2 yr above median (18 yr)
State licenses
3 states
Top 84% — 15% of peers are multi-state
Subspecialties
2
In the 57% of peers with subspecialties
NPI lifetime · 2005 → 2026
2005-09Enumerated in NPPES
2005
2026
Where they practice
Practice location
2000 Precinct Line Rd Ste 101
Hurst, TX 760543185
Mailing address
601 Omega Dr Ste 208
Arlington, TX 760142075
Additional practice locations
4 secondary locations on file with NPPES.
Location 2
4200 W Memorial Rd Ste 805
Oklahoma City, OK 731208359
Location 3
6868 San Pedro Ave
San Antonio, TX 782167201
Location 4
3030 Warrenville Rd Ste 210
Lisle, IL 605323646
Location 5
2641 Haddassah Dr
Naperville, IL 605653067
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 MedicineAn Internist who practices Sleep Medicine is certified in the subspecialty of sleep medicine and specializes in the clinical assessment, physiologic testing, diagnosis, management and prevention of sleep and circadian rhythm disorders....
-
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...
Identifiers
| Type | Value | Notes |
|---|---|---|
| 05 (TX) | 124086303 |
Multi-state credentialing: Licensed in 3 states. Useful context for credentialers building cross-state provider networks.
Practice context
Part of a multi-provider practice. 3 other active providers share this practice address in NPPES.
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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.