Nicholas N. Nissen, M.D.
NPI 1174507099ActiveIndividual· Surgery, Surgical Critical Care· Los Angeles, CA
Surgery, Surgical Critical Care (M.D.) in Los Angeles, California, trained at University of Minnesota Medical School (class of 1987). Their prescriptions cost Medicare Part D more than their services did: $533,518 for 424 claims, against $253,578 paid for services in 2024. Histosonics, Inc. was the largest of 4 companies reporting payments in 2025, $6,795 in all, mostly travel and lodging.
Overview
| NPI | 1174507099 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Dec 5, 2005 |
| Last updated in NPPES | Aug 15, 2025 |
| Certified by provider | Aug 15, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Surgery, Surgical Critical Care Primary | 2086S0102X | G85301 | CA |
| Transplant Surgery | 204F00000X | G85301 | CA |
| Surgery | 208600000X | G85301 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - General Surgery (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 498 |
|---|---|
| Services billed | 1,580 across 62 procedure codes |
| Paid by Medicare | $253,578 |
Part D prescriptions in 2024
| Prescriptions (claims) | 424 · 573 30-day fills |
|---|---|
| Patients | 101 |
| Total drug cost | $533,518 |
Education and affiliations
| Medical school | University of Minnesota Medical School |
|---|---|
| Graduation year | 1987 |
| Medicare specialty | General Surgery |
| Secondary specialties | Critical Care (Intensivists) |
| Telehealth | Offers telehealth |
Medical groups
- Cedars-Sinai Medical Care FoundationWest Hollywood, CA · 1,692 clinicians
- Cedars-Sinai Medical CenterWest Hollywood, CA · 799 clinicians
Hospital affiliations
- Adventist Health BakersfieldBakersfield, CA
- Cedars-Sinai Medical CenterLos Angeles, CA
- Hoag Memorial Hospital PresbyterianNewport Beach, CA
Other facilities
- Community Home Health Care ServicesHome health agency · Glendale, CA
- Healing Care Home Health, IncHome health agency · Glendale, CA
Industry payments (Open Payments)
- 2025$6,795 · 24 payments from 4 companies
- 2024$2,835 · 14 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Histosonics, Inc. | $6,518 | 21 |
| Galvanize Therapeutics, Inc | $138.66 | 1 |
| Ethicon US, LLC | $108.96 | 1 |
| Abbvie Inc. | $28.86 | 1 |
What the 2025 payments were for
- Travel and Lodging$4,514 · 19 payments
- Consulting Fee$2,000 · 1 payment
- Food and Beverage$280.46 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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