Mark Bielefeld, MD
NPI 1538255229 · Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Corpus Christi, TX
Enrolled with Medicare as Practitioner - Thoracic Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Bielefeld, MD is a Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician provider in Corpus Christi, TX (NPI 1538255229).
Provider details
- NPI number
- 1538255229
- Entity type
- Individual
- Primary specialty
- Thoracic Surgery (Cardiothoracic Vascular Surgery) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- L1528 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
368 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 229 | $76 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 50 | $167 |
| Critical Care, First 30-74 Minutes99291 | 27 | $203 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 22 | $165 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 21 | $126 |
| Coronary Artery Bypass Using Artery Graft, 1 Graft33533 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Furosemide | 15 | 11 |
| Gabapentin | 15 | — |
| Metoprolol Tartrate | 15 | — |
| Tramadol Hcl | 13 | — |
| Acetaminophen With Codeinebrand: Acetaminophen-Codeine | 11 | — |
| Clopidogrel Bisulfatebrand: Clopidogrel | 11 | — |
| Duloxetine Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$955 across 15 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-04
- Last updated
- 2016-10-21
Frequently asked questions
- What is Mark Bielefeld's NPI number?
- Mark Bielefeld's National Provider Identifier (NPI) is 1538255229, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Bielefeld's specialty?
- Mark Bielefeld is listed in the NPPES registry with a primary specialty of Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Bielefeld located?
- Mark Bielefeld's practice location on file with NPPES is 1224 3rd St, Corpus Christi, TX 78404-2354.
- What is Mark Bielefeld's phone number?
- The practice phone number listed in the NPPES registry for Mark Bielefeld is (361) 854-0201.
- Does Mark Bielefeld accept Medicare?
- Mark Bielefeld is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Bielefeld's NPI active?
- Yes — Mark Bielefeld's NPI (1538255229) is active in the NPPES registry as of the last update on 2016-10-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.