John Y. Um, MD
NPI 1134346745ActiveIndividual· Thoracic Surgery (Cardiothoracic Vascular Surgery)· Omaha, NE
Thoracic Surgery (Cardiothoracic Vascular Surgery) (MD) in Omaha, Nebraska, trained at Warren Alpert Medical School of Brown University (class of 1999). Mostly services rather than prescriptions: Medicare paid $83,178 for 49 patients in 2024, with only 31 Part D claims. Abiomed was the largest of 3 companies reporting payments in 2025, $1,602 in all, mostly travel and lodging.
Overview
| NPI | 1134346745 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 18, 2007 |
| Last updated in NPPES | Sep 17, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Thoracic Surgery (Cardiothoracic Vascular Surgery) Primary | 208G00000X | 2007-01008 | NC |
| Surgery | 208600000X | A90965 | CA |
| Thoracic Surgery (Cardiothoracic Vascular Surgery) | 208G00000X | A90965 | CA |
| Surgery | 208600000X | 2007-01008 | NC |
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 (NE) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 49 |
|---|---|
| Services billed | 153 across 43 procedure codes |
| Paid by Medicare | $83,178 |
Part D prescriptions in 2024
| Prescriptions (claims) | 31 · 61 30-day fills |
|---|---|
| Total drug cost | $219.05 |
| Generic share | 100% of claims |
Education and affiliations
| Medical school | Warren Alpert Medical School of Brown University |
|---|---|
| Graduation year | 1999 |
| Medicare specialty | Thoracic Surgery |
Medical group
- Unmc PhysiciansBellevue, NE · 1,518 clinicians
Hospital affiliations
- Bellevue Medical CenterBellevue, NE
- St Lukes Regional Medical CenterSioux City, IA
- The Nebraska Medical CenterOmaha, NE
- The Nebraska Methodist HospitalOmaha, NE
Other facilities
- Accentcare Home Health of NebraskaHome health agency · Omaha, NE
Industry payments (Open Payments)
- 2025$1,602 · 17 payments from 3 companies
- 2024$1,030 · 11 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abiomed | $1,229 | 14 |
| Edwards Lifesciences Corporation | $189.05 | 1 |
| Abbott Laboratories | $183.80 | 2 |
What the 2025 payments were for
- Travel and Lodging$831.60 · 4 payments
- Food and Beverage$770.09 · 13 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 27 cardiothoracic surgeons in Omaha · All cardiothoracic surgeons in Nebraska