Quick answers
- Which hospitals does Marshall L. Warren work at?
- Medicare's official clinician data lists Marshall L. Warren at 3 hospitals: CHRISTUS Santa Rosa Hospital-San Marcos, Guadalupe Regional Medical Center and Resolute Health Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Marshall L. Warren 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 Marshall L. Warren's specialty?
- Medicare lists Vascular Surgery as the primary specialty, and also General Surgery.
- Does Marshall L. Warren accept Medicare assignment?
- Yes. Medicare's clinician data says Marshall L. Warren 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 Marshall L. Warren offer telehealth?
- Medicare's clinician data says Marshall L. Warren offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Marshall L. Warren?
- (512) 753-3757, as listed in official Medicare / NPI Registry data.
- What is Marshall L. Warren's NPI number?
- 1942793112. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Marshall L. Warren works
Medicare's Facility Affiliation Data lists Marshall L. Warren 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
- Guadalupe Regional Medical CenterSeguin, TX · Acute Care Hospital · CCN 450104
- Resolute Health HospitalNew Braunfels, TX · Acute Care Hospital · CCN 670098
Practice locations
Addresses where Marshall L. Warren is enrolled with Medicare (CMS data updated 2026-10-02).
- 1340 Wonder World Dr, Suite 4201San Marcos, TX 78666 (512) 753‑3757
- 479 Oxford Dr, Suite 104New Braunfels, TX 78130 (830) 214‑0300
Group practices
Medicare enrollment lists Marshall L. Warren as a member of this group (CMS data updated 2026-10-02).
- Lone Star Heart and Vascular Clinic PA14 clinicians in the group
Specialties
- Vascular Surgeryprimary
- General Surgeryalso
Other vascular surgeons in Texas
Clinicians with the same Medicare primary specialty in Texas — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | University Of North Texas Hsc, College Of Osteopathic Med |
| Graduation year | 2018 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1942793112 |
| 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