NPI age
20 years
Enumerated 2005-10-14
● Active
Type 1 · Individual
Phillip E Mason, MD
Mason is 1 of 35 internal medicine providers in San Antonio and 1 of 479 in Texas.
Primary specialty
Internal Medicine
Plus 3 subspecialties
Licensed in
TX, OH
2 states
Status
Active
No deactivations on record
Last NPPES update
2024-05-20
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
20 years
↑ 4 yr above median (16 yr)
State licenses
2 states
Top 67% — 32% of peers are multi-state
Subspecialties
2
In the 79% of peers with subspecialties
NPI lifetime · 2005 → 2026
2005-10Enumerated in NPPES
2005
2026
Where they practice
Practice location
21 Spurs Ln, 230b
San Antonio, TX 782401669
Mailing address
21 Spurs Ln, 230b
San Antonio, TX 782401669
Additional practice locations
1 secondary location on file with NPPES.
Location 2
4502 Medical Dr
San Antonio, TX 782294402
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...
-
Emergency MedicineAn 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....
-
Emergency MedicineAn emergency medicine physician who specializes in non-hospital based emergency medical services (e.g., disaster site, accident scene, transport vehicle, etc.) to provide pre-hospital assessment, treatment, and transport patients.
Identifiers
| Type | Value | Notes |
|---|---|---|
| 05 (TX) | 154188002 | |
| 05 (OH) | 2493798 | |
| 05 (TX) | 154188004 | |
| 05 (TX) | 154188003 |
Multi-state credentialing: Licensed in 2 states. Useful context for credentialers building cross-state provider networks.
Practice context
Part of a multi-provider practice. 60 other active providers share this practice address in NPPES.
Recently enumerated nearby: 1 new internal medicine provider has been added in San Antonio in the last 180 days.
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Request a quote →How to verify this provider
- 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.