NPI age
18 years
Enumerated 2007-07-10
● Active
Type 1 · Individual
DR. Thalia N Casimire, MD
Casimire is 1 of 141 internal medicine providers in Houston and 1 of 479 in Texas.
Primary specialty
Internal Medicine
Plus 4 subspecialties
Licensed in
TX, AR
2 states
Status
Active
No deactivations on record
Last NPPES update
2025-07-22
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 479 active internal medicine providers in Texas.
NPI age
18 years
↑ 2 yr above median (16 yr)
State licenses
2 states
Top 67% — 32% of peers are multi-state
Subspecialties
3
In the 79% of peers with subspecialties
NPI lifetime · 2007 → 2026
2007-07Enumerated in NPPES
2007
2026
Where they practice
Practice location
13300 Hargrave Rd Ste 100
Houston, TX 770704532
Mailing address
13300 Hargrave Rd Ste 100
Houston, TX 770704532
Additional practice locations
4 secondary locations on file with NPPES.
Location 2
One Mercy Lane, Ste 401
Hot Springs, AR 719136441
Location 3
18220 State Highway 249 Ste 1360
Houston, TX 770704347
Location 4
700 Scott And White Dr
College Station, TX 778456441
Location 5
619 S Fleishel Ave Ste 100
Tyler, TX 757012004
Specialties
-
Internal Medicine PrimaryAn 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...
-
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 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....
Identifiers
| Type | Value | Notes |
|---|---|---|
| 05 (TX) | 372873501 | |
| 05 (AR) | 204394001 |
Multi-state credentialing: Licensed in 2 states. Useful context for credentialers building cross-state provider networks.
Practice context
Solo or small practice. No other active providers share this practice address in NPPES.
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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.