NPI age
17 years
Enumerated 2008-07-30
● Active
Type 1 · Individual
DR. Aaron Grey Matlock, M.D.
Matlock is 1 of 86 emergency medicine providers in Fort Sam Houston and 1 of 6039 in Texas.
Primary specialty
Emergency Medicine
Plus 5 subspecialties
Licensed in
TX, GU, AK, HI, WA, NM
6 states
Status
Active
No deactivations on record
Last NPPES update
2019-12-21
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 6039 active emergency medicine providers in Texas.
NPI age
17 years
↑ 2 yr above median (15 yr)
State licenses
6 states
Top 82% — 17% of peers are multi-state
Subspecialties
0
43% of peers hold subspecialties
NPI lifetime · 2008 → 2026
2008-07Enumerated in NPPES
2008
2026
Where they practice
Practice location
3551 Roger Brooke Dr
Fort Sam Houston, TX 782344504
Mailing address
3551 Roger Brooke Dr
Fort Sam Houston, TX 782344504
Additional practice locations
1 secondary location on file with NPPES.
Location 2
4502 Medical Dr
San Antonio, TX 782294402
Specialties
-
Emergency Medicine PrimaryAn emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department....
Identifiers
| Type | Value | Notes |
|---|---|---|
| 01 (TX) | 353513008 | CSHCN |
| 05 (TX) | 353513007 |
Multi-state credentialing: Licensed in 6 states. Useful context for credentialers building cross-state provider networks.
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.
- Confirm payer enrollment if billing.NPI presence does not guarantee active enrollment with Medicare, Medicaid, or commercial payers.