Mark William Onaitis, MD
NPI 1841310638ActiveIndividual· Thoracic Surgery (Cardiothoracic Vascular Surgery)· San Diego, CA
Thoracic Surgery (Cardiothoracic Vascular Surgery) (MD) in San Diego, California, trained at Duke University School of Medicine (class of 1997). Mostly services rather than prescriptions: Medicare paid $78,180 for 116 patients in 2024, with only 38 Part D claims. Medtronic, Inc. was the largest of 6 companies reporting payments in 2025, $9,171 in all, mostly speaking and faculty fees.
Overview
| NPI | 1841310638 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 29, 2007 |
| Last updated in NPPES | Feb 21, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Thoracic Surgery (Cardiothoracic Vascular Surgery) Primary | 208G00000X | A144886 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Thoracic Surgery (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 116 |
|---|---|
| Services billed | 234 across 33 procedure codes |
| Paid by Medicare | $78,180 |
Part D prescriptions in 2024
| Prescriptions (claims) | 38 · 47 30-day fills |
|---|---|
| Patients | 26 |
| Total drug cost | $1,608 |
| Generic share | 100% of claims |
Education and affiliations
| Medical school | Duke University School of Medicine |
|---|---|
| Graduation year | 1997 |
| Medicare specialty | Thoracic Surgery |
| Telehealth | Offers telehealth |
Medical group
- Regents of the University of CaliforniaSan Diego, CA · 2,089 clinicians
Hospital affiliation
- Uc San Diego Health Hillcrest - Hillcrest Med CtrSan Diego, CA
Industry payments (Open Payments)
- 2025$9,171 · 17 payments from 6 companies
- 2024$44,672 · 22 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Medtronic, Inc. | $7,233 | 8 |
| Astrazeneca Pharmaceuticals LP | $1,232 | 2 |
| Galvanize Therapeutics, Inc | $314.67 | 2 |
| Serpex Medical Inc | $240.20 | 1 |
| Davol Inc. | $120.28 | 3 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$5,000 · 1 payment
- Consulting Fee$3,163 · 2 payments
- Food and Beverage$1,009 · 14 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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