Aussama Khalaf Nassar, MD
NPI 1326589870ActiveIndividual· Surgery· Palo Alto, CA
Surgery (MD) with Stanford Health Care, practicing in Palo Alto, California. Mostly services rather than prescriptions: Medicare paid $69,537 for 285 patients in 2024, with only 28 Part D claims. Intuitive Surgical, Inc. reported $4,427 in payments in 2025, mostly education. Lists Stanford Health Care as a hospital affiliation.
Overview
| NPI | 1326589870 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 16, 2017 |
| Last updated in NPPES | Apr 27, 2024 |
| Certified by provider | Apr 27, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Surgery Primary | 208600000X | C148059 | CA |
| Surgery, Surgical Critical Care | 2086S0102X | 148059 | CA |
| Surgery, Trauma Surgery | 2086S0127X | 148059 | 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 - General Surgery (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 285 |
|---|---|
| Services billed | 587 across 56 procedure codes |
| Paid by Medicare | $69,537 |
Part D prescriptions in 2024
| Prescriptions (claims) | 28 · 29 30-day fills |
|---|---|
| Total drug cost | $964.20 |
| Generic share | 46% of claims |
Education and affiliations
| Graduation year | 1995 |
|---|---|
| Medicare specialty | General Surgery |
| Secondary specialties | Critical Care (Intensivists) |
| Telehealth | Offers telehealth |
Medical group
- Stanford Health CareStanford, CA · 3,122 clinicians
Hospital affiliation
- Stanford Health CareStanford, CA
Industry payments (Open Payments)
- 2025$4,427 · 11 payments from 1 company
- 2024$105.58 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Intuitive Surgical, Inc. | $4,427 | 11 |
What the 2025 payments were for
- Education$2,614 · 2 payments
- Travel and Lodging$1,391 · 6 payments
- Food and Beverage$422.34 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 63 general surgeons in Palo Alto · All general surgeons in California