NPI age
17 years
Enumerated 2008-05-30
● Active
Type 1 · Individual
Arsen M Zacharian, MD
Zacharian is 1 of 823 internal medicine providers in San Antonio and 1 of 12343 in Texas.
Primary specialty
Internal Medicine
Plus 2 subspecialties
Licensed in
TX, CO
2 states
Status
Active
No deactivations on record
Last NPPES update
2026-03-23
Source: monthly bulk 2026-05
Sole proprietor
Yes
Solo practice on file
How this provider compares
Across 12343 active internal medicine providers in Texas.
NPI age
17 years
≈ at median (17 yr)
State licenses
2 states
Top 88% — 12% of peers are multi-state
Subspecialties
1
In the 33% of peers with subspecialties
NPI lifetime · 2008 → 2026
2008-05Enumerated in NPPES
2008
2026
Where they practice
Practice location
4502 Medical Dr
San Antonio, TX 782294402
Mailing address
4502 Medical Dr
San Antonio, TX 782294402
Additional practice locations
1 secondary location on file with NPPES.
Location 2
810 W Highway 71
Marble Falls, TX 786548602
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,...
-
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...
Practice context
Part of a multi-provider practice. 1646 other active providers share this practice address in NPPES.
Recently enumerated nearby: 6 new internal medicine providers have been added in San Antonio in the last 180 days.
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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.