David Maziarz, M.D.
NPI 1265643985 · Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Sioux Falls, SD
Enrolled with Medicare as Practitioner - Thoracic Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
David Maziarz, M.D. is a Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician provider in Sioux Falls, SD (NPI 1265643985).
Provider details
- NPI number
- 1265643985
- Entity type
- Individual
- Primary specialty
- Thoracic Surgery (Cardiothoracic Vascular Surgery) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 42677 (TN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Other Service Providers
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
135 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) |
|---|---|---|
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 29 | $170 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 27 | $163 |
| Replacement of Aortic Valve Through the Skin and Femoral Artery33361 | 26 | $658 |
| Harvest of Vein Using an Endoscope33508 | 20 | $14 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 17 | $157 |
| Coronary Artery Bypass Using Artery Graft, 1 Graft33533 | 16 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$313 across 10 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
- 2007-05-24
- Last updated
- 2022-07-12
- Certified
- 2022-07-12
Frequently asked questions
- What is David Maziarz's NPI number?
- David Maziarz's National Provider Identifier (NPI) is 1265643985, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Maziarz's specialty?
- David Maziarz is listed in the NPPES registry with a primary specialty of Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (Allopathic & Osteopathic Physicians).
- Where is David Maziarz located?
- David Maziarz's practice location on file with NPPES is 1301 W 18th St, Sioux Falls, SD 57105-0401.
- What is David Maziarz's phone number?
- The practice phone number listed in the NPPES registry for David Maziarz is (605) 312-2100.
- Does David Maziarz accept Medicare?
- David Maziarz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is David Maziarz's NPI active?
- Yes — David Maziarz's NPI (1265643985) is active in the NPPES registry as of the last update on 2022-07-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.