NPI age
13 years
Enumerated 2013-05-07
● Active
Type 1 · Individual
Gustavo R. Armaiz-Pena, M.D.
Armaiz-Pena is 1 of 85 internal medicine providers in San Antonio and 1 of 935 in Texas.
Primary specialty
Internal Medicine
Plus 2 subspecialties
Licensed in
TX
1 state
Status
Active
No deactivations on record
Last NPPES update
2025-08-14
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 935 active internal medicine providers in Texas.
NPI age
13 years
↓ 5 yr below median (18 yr)
State licenses
1 state
15% of peers hold multiple states
Subspecialties
2
In the 38% of peers with subspecialties
NPI lifetime · 2013 → 2026
2013-05Enumerated in NPPES
2013
2026
Where they practice
Practice location
4502 Medical Dr
San Antonio, TX 782294402
Mailing address
4502 Medical Dr
San Antonio, TX 782294402
Specialties
-
Internal Medicine PrimaryAn internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary...
-
HospitalistHospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term...
-
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,...
Identifiers
| Type | Value | Notes |
|---|---|---|
| 05 (TX) | 400097801 | |
| 01 (TX) | 400097802 | CSHCN |
Practice context
Part of a multi-provider practice. 1646 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.
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