NPI age
18 years
Enumerated 2007-08-07
● Active
Type 1 · Individual
DR. Ana Elizabeth Markelz, MD
Markelz is 1 of 12 internal medicine providers in Fort Sam Houston and 1 of 920 in Texas.
Primary specialty
Internal Medicine
Licensed in
VA
1 state
Status
Active
No deactivations on record
Last NPPES update
2012-07-06
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 920 active internal medicine providers in Texas.
NPI age
18 years
≈ at median (17 yr)
State licenses
1 state
16% of peers hold multiple states
Subspecialties
0
35% of peers hold subspecialties
NPI lifetime · 2007 → 2026
2007-08Enumerated in NPPES
2007
2026
Where they practice
Practice location
3551 Roger Brooke Dr, McHe-Qd, Bldg 3600
Fort Sam Houston, TX 782344501
Mailing address
3551 Roger Brooke Dr, McHe-Qd,; Bldg 3600
Fort Sam Houston, TX 782344501
Specialties
-
Internal Medicine PrimaryAn internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients...
Practice context
Part of a multi-provider practice. 1394 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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