Quick answers
- Which hospitals does John C. Simmons work at?
- Medicare's official clinician data lists John C. Simmons at 1 hospital: Ascension Seton Medical Center Austin. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John C. Simmons see patients?
- Medicare's clinician data lists 1 practice location in Round Rock, TX. Call before your visit to confirm the address.
- What is John C. Simmons's specialty?
- Medicare lists Otolaryngology as the primary specialty.
- Does John C. Simmons accept Medicare assignment?
- Yes. Medicare's clinician data says John C. Simmons 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.
- Does John C. Simmons offer telehealth?
- Medicare's clinician data says John C. Simmons offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for John C. Simmons?
- (512) 244-9024, as listed in official Medicare / NPI Registry data.
- What is John C. Simmons's NPI number?
- 1942582929. 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 C. Simmons works
Medicare's Facility Affiliation Data lists John C. Simmons at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Ascension Seton Medical Center AustinAustin, TX · Acute Care Hospital · CCN 450056
Practice locations
Addresses where John C. Simmons is enrolled with Medicare (CMS data updated 2026-10-02).
- 940 Hesters Crossing RdRound Rock, TX 78681 (512) 244‑9024
Group practices
Medicare enrollment lists John C. Simmons as a member of this group (CMS data updated 2026-10-02).
- Austin Regional Clinic PA397 clinicians in the group
Specialties
- Otolaryngologyprimary
Other ENT doctors in Round Rock
Clinicians with the same Medicare primary specialty in Round Rock, TX — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2011 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1942582929 |
| 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