PHILLIP E MASON MD
NPI 1952390841
Internal Medicine - Critical Care Medicine in San Antonio, TX
About Phillip E Mason Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
PHILLIP E MASON MD (NPI 1952390841) is an individual critical care medicine provider in San Antonio, Texas, licensed in Texas (L5039) and active in the NPI registry since October 2005. He is enrolled in Medicare PECOS, is affiliated with University Health System, and is a graduate of University Of Texas Southwestern Medical School At Dallas (1999).
NPPES Registry Identity
Specialties & Licenses 2
Other Names 1
Other Identifiers 4
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Phillip E Mason Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
7Medicare enrollment records show Phillip Mason reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Antonio, TX 78229
- Reassigned Medicare billing, Texas enrollment
- Medicare enrollment name: University Of Texas Health Science Center At San Antonio
- 2,397 clinicians in this Medicare group
San Antonio, TX 78229
- Reassigned Medicare billing, Texas enrollment
- 110 clinicians in this Medicare group
San Antonio, TX 78207
- Reassigned Medicare billing, Texas enrollment
- 1,129 clinicians in this Medicare group
Corpus Christi, TX 78404
- Reassigned Medicare billing, Texas enrollment
- 69 clinicians in this Medicare group
Houston, TX 77030
- Reassigned Medicare billing, Texas enrollment
- 2,407 clinicians in this Medicare group
Houston, TX 77090
- Reassigned Medicare billing, Texas enrollment
- 88 clinicians in this Medicare group
Arlington, TX 76015
- Reassigned Medicare billing, Texas enrollment
- 454 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
University Health System
Acute Care Hospitals · San Antonio, TXPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 78229 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAN ANTONIO, TX 78229
SAN ANTONIO, TX 78229
SAN ANTONIO, TX 78229
SAN ANTONIO, TX 78229
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Phillip Mason's NPI number?
The NPI number for Phillip Mason is 1952390841. It was assigned to this individual provider in the NPPES registry on October 14, 2005. The provider is also known as Phillip Mason MD.
Where is Phillip Mason located?
Phillip Mason practices at 4502 Medical Dr, San Antonio, TX 78229. The listed phone number is (210) 358-4000.
What is Phillip Mason's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.
Is Phillip Mason enrolled in Medicare?
Yes. Phillip Mason is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Phillip Mason's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Phillip Mason reassigns Medicare benefits to 7 organizations: Uthscsa Dental School (San Antonio, TX), Texas Ips LLC (San Antonio, TX), Community Medicine Associates (San Antonio, TX), Gulf Coast Intensivists, PLLC (Corpus Christi, TX), Tmh Physician Associates PLLC (Houston, TX) and 2 more organizations, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Phillip Mason's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Phillip Mason accept?
Health plans from Baylor Scott and White Health Plan, Blue Cross and Blue Shield of Texas, CHRISTUS Health Plan, Community First and Imperial Insurance Companies, Inc. and 3 other insurers list Phillip Mason as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Phillip Mason affiliated with any hospitals?
According to CMS data, Phillip Mason is affiliated with University Health System.
When was this NPI record last updated?
The NPPES record for Phillip Mason was last updated on June 11, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Phillip E Mason, MD · NPI 1952390841
Critical Care Medicine physician in San Antonio, Texas. Individual provider, active in the CMS NPPES registry since October 14, 2005.
## Identity
- **NPI:** 1952390841 (Entity type: Individual)
- **Enumerated:** October 14, 2005
- **Primary specialty:** Internal Medicine - Critical Care Medicine · taxonomy 207RC0200X
- **State license:** L5039 (Texas)
- **Sole proprietor:** No
## Practice location
- **Address:** 4502 MEDICAL DR, San Antonio, TX 78229-4402
- **Phone:** (210) 358-4000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 7 organizations under Medicare reassignment (form CMS-855R): Uthscsa Dental School (NPI 1750403887, San Antonio, TX); Texas Ips LLC (NPI 1629368535, San Antonio, TX); Community Medicine Associates (NPI 1245313329, San Antonio, TX); Gulf Coast Intensivists, PLLC (NPI 1104509199, Corpus Christi, TX); Tmh Physician Associates PLLC (NPI 1275779225, Houston, TX); and 2 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Texas Southwestern Medical School At Dallas, class of 1999
## Record status
- **NPPES last updated:** June 11, 2026
- **Other identifiers:** Medicaid 154188002 (TX); Medicaid 2493798 (OH); Medicaid 154188004 (TX); and 1 more
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Source: [NPI Profile](https://npiprofile.com/npi/1952390841) · Data from the CMS NPPES public registry.