Quick answers
- Which hospitals does John Hamilton work at?
- Medicare's official clinician data lists John Hamilton at 4 hospitals: CHRISTUS Santa Rosa Hospital-San Marcos, Methodist Hospital, Methodist Hospital Atascosa and Peterson Regional Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John Hamilton see patients?
- Medicare's clinician data lists 2 practice locations, including San Marcos, TX and New Braunfels, TX. Call before your visit to confirm the address.
- What is John Hamilton's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does John Hamilton accept Medicare assignment?
- Yes. Medicare's clinician data says John Hamilton 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 Hamilton?
- (512) 353-8979, as listed in official Medicare / NPI Registry data.
- What is John Hamilton's NPI number?
- 1487034831. 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 Hamilton works
Medicare's Facility Affiliation Data lists John Hamilton at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- CHRISTUS Santa Rosa Hospital-San MarcosSan Marcos, TX · Acute Care Hospital · CCN 450272
- Methodist HospitalSan Antonio, TX · Acute Care Hospital · CCN 450388
- Methodist Hospital AtascosaJourdanton, TX · Acute Care Hospital · CCN 450165
- Peterson Regional Medical CenterKerrville, TX · Acute Care Hospital · CCN 450007
Practice locations
Addresses where John Hamilton is enrolled with Medicare (CMS data updated 2026-10-02).
- 1301 Wonder World DrSan Marcos, TX 78666 (512) 353‑8979
- 600 N Union AveNew Braunfels, TX 78130 (830) 606‑9111
Group practices
Medicare enrollment lists John Hamilton as a member of this group (CMS data updated 2026-10-02).
- Comal Emergency Physicians PLLC91 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in San Marcos
Clinicians with the same Medicare primary specialty in San Marcos, TX — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2015 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1487034831 |
| 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