Quick answers
- Which hospitals does John T. O'Brien work at?
- Medicare's official clinician data lists John T. O'Brien at 2 hospitals: Ascension Seton Williamson and Baylor Scott & White Medical Center - Round Rock. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John T. O'Brien see patients?
- Medicare's clinician data lists 5 practice locations, including Austin, TX, Round Rock, TX and Kyle, TX. Call before your visit to confirm the address.
- What is John T. O'Brien's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does John T. O'Brien accept Medicare assignment?
- Yes. Medicare's clinician data says John T. O'Brien accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for John T. O'Brien?
- (512) 324-7300, as listed in official Medicare / NPI Registry data.
- What is John T. O'Brien's NPI number?
- 1750713186. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John T. O'Brien works
Medicare's Facility Affiliation Data lists John T. O'Brien at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Ascension Seton WilliamsonRound Rock, TX · Acute Care Hospital · CCN 670041
- Baylor Scott & White Medical Center - Round RockRound Rock, TX · Acute Care Hospital · CCN 670034
Practice locations
Addresses where John T. O'Brien is enrolled with Medicare (CMS data updated 2026-10-02).
- 1400 N Ih 35Austin, TX 78701
- 1400 N Ih 35 Ll, Cl400 Tri County Prac AssocAustin, TX 78701 (512) 324‑7300
- 201 Seton PkwyRound Rock, TX 78665 (512) 324‑4000
- 6001 Kyle PkwyKyle, TX 78640 (512) 504‑5000
- 7900 FMAustin, TX 78737
Group practices
Medicare enrollment lists John T. O'Brien as a member of this group (CMS data updated 2026-10-02).
- Seton Family of Doctors792 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Austin
Clinicians with the same Medicare primary specialty in Austin, TX — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2013 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1750713186 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians