Quick answers
- Which hospitals does Mark E. Johnson work at?
- Medicare's official clinician data lists Mark E. Johnson at 3 hospitals: Methodist Hospital, Methodist Hospital Stone Oak and The Hospital at Westlake Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark E. Johnson see patients?
- Medicare's clinician data lists 1 practice location in San Antonio, TX. Call before your visit to confirm the address.
- What is Mark E. Johnson's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Mark E. Johnson accept Medicare assignment?
- Yes. Medicare's clinician data says Mark E. Johnson 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 Mark E. Johnson?
- (210) 757-1200, as listed in official Medicare / NPI Registry data.
- What is Mark E. Johnson's NPI number?
- 1669578357. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark E. Johnson works
Medicare's Facility Affiliation Data lists Mark E. Johnson at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Methodist HospitalSan Antonio, TX · Acute Care Hospital · CCN 450388
- Methodist Hospital Stone OakSan Antonio, TX · Acute Care Hospital · CCN 670055
- The Hospital at Westlake Medical CenterAustin, TX · Acute Care Hospital · CCN 670006
Practice locations
Addresses where Mark E. Johnson is enrolled with Medicare (CMS data updated 2026-10-02).
- 3154 SE Military Dr, Suite 103 Methodist ER City BaseSan Antonio, TX 78223 (210) 757‑1200
Group practices
Medicare enrollment lists Mark E. Johnson as a member of this group (CMS data updated 2026-10-02).
- Emergency Medicine Services of TX, PLLC400 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in San Antonio
Clinicians with the same Medicare primary specialty in San Antonio, TX — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Rush Medical College Of Rush University |
| Graduation year | 2000 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1669578357 |
| 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