Quick answers
- Which hospitals does Ee Sing A. Ong work at?
- Medicare's official clinician data lists Ee Sing A. Ong at 4 hospitals: Ascension Seton Hays, Ascension Seton Williamson, CHRISTUS Santa Rosa Hospital-San Marcos and Resolute Health Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Ee Sing A. Ong see patients?
- Medicare's clinician data lists 5 practice locations, including San Marcos, TX, Round Rock, TX and New Braunfels, TX. Call before your visit to confirm the address.
- What is Ee Sing A. Ong's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Ee Sing A. Ong accept Medicare assignment?
- Yes. Medicare's clinician data says Ee Sing A. Ong 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 Ee Sing A. Ong?
- (512) 353-8979, as listed in official Medicare / NPI Registry data.
- What is Ee Sing A. Ong's NPI number?
- 1336577287. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Ee Sing A. Ong works
Medicare's Facility Affiliation Data lists Ee Sing A. Ong at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Ascension Seton HaysKyle, TX · Acute Care Hospital · CCN 670056
- Ascension Seton WilliamsonRound Rock, TX · Acute Care Hospital · CCN 670041
- CHRISTUS Santa Rosa Hospital-San MarcosSan Marcos, TX · Acute Care Hospital · CCN 450272
- Resolute Health HospitalNew Braunfels, TX · Acute Care Hospital · CCN 670098
Practice locations
Addresses where Ee Sing A. Ong is enrolled with Medicare (CMS data updated 2026-10-02).
- 1301 Wonder World DrSan Marcos, TX 78666 (512) 353‑8979
- 201 Seton PkwyRound Rock, TX 78665 (512) 324‑4000
- 555 Creekside XingNew Braunfels, TX 78130 (830) 500‑6650
- 600 N Union AveNew Braunfels, TX 78130 (830) 606‑9111
- 6001 Kyle PkwyKyle, TX 78640 (512) 504‑5000
Group practices
Medicare enrollment lists Ee Sing A. Ong as a member of these groups (CMS data updated 2026-10-02).
- Usacs Critical Care Medicine Services of Texas PLLC75 clinicians in the group
- Central Texas Intensivists PLLC21 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in San Marcos
Clinicians with the same Medicare primary specialty in San Marcos, TX — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2013 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1336577287 |
| 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