Quick answers
- Which hospitals does Mark R. Bielefeld work at?
- Medicare's official clinician data lists Mark R. Bielefeld at 5 hospitals: CHRISTUS Spohn Hospital Corpus Christi, Harlingen Medical Center, The Corpus Christi Medical Center, Valley Regional Medical Center and VHS Harlingen Hospital Company LLC. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark R. Bielefeld see patients?
- Medicare's clinician data lists 1 practice location in Corpus Christi, TX. Call before your visit to confirm the address.
- What is Mark R. Bielefeld's specialty?
- Medicare lists Thoracic Surgery as the primary specialty, and also Cardiac Surgery and Vascular Surgery.
- Does Mark R. Bielefeld accept Medicare assignment?
- Yes. Medicare's clinician data says Mark R. Bielefeld 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 R. Bielefeld?
- (361) 854-0201, as listed in official Medicare / NPI Registry data.
- What is Mark R. Bielefeld's NPI number?
- 1538255229. 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 R. Bielefeld works
Medicare's Facility Affiliation Data lists Mark R. Bielefeld at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- CHRISTUS Spohn Hospital Corpus ChristiCorpus Christi, TX · Acute Care Hospital · CCN 450046
- Harlingen Medical CenterHarlingen, TX · Acute Care Hospital · CCN 450855
- The Corpus Christi Medical CenterCorpus Christi, TX · Acute Care Hospital · CCN 450788
- Valley Regional Medical CenterBrownsville, TX · Acute Care Hospital · CCN 450662
- VHS Harlingen Hospital Company LLCHarlingen, TX · Acute Care Hospital · CCN 450033
Practice locations
Addresses where Mark R. Bielefeld is enrolled with Medicare (CMS data updated 2026-10-02).
- 1224 3rd StCorpus Christi, TX 78404 (361) 854‑0201
Group practices
Medicare enrollment lists Mark R. Bielefeld as a member of this group (CMS data updated 2026-10-02).
- J Mark Morales MD PA4 clinicians in the group
Specialties
- Thoracic Surgeryprimary
- Cardiac Surgeryalso
- Vascular Surgeryalso
Other thoracic surgeons in Corpus Christi
Clinicians with the same Medicare primary specialty in Corpus Christi, TX — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Medical College Of Wisconsin |
| Graduation year | 1988 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1538255229 |
| 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