Mark Koransky, MD
NPI 1750472338ActiveIndividual· Surgery· Fremont, CA
Surgery (MD) in Fremont, California, trained at University of California, San Francisco School of Medicine (class of 1996). 234 Medicare patients in 2024, $87,929 paid; all of their 66 Part D prescriptions were generic. Intuitive Surgical, Inc. reported $927.81 in payments in 2025, mostly travel and lodging.
Overview
| NPI | 1750472338 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Sep 27, 2006 |
| Last updated in NPPES | May 20, 2020 |
| Certified by provider | May 20, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Surgery Primary | 208600000X | A63039 | 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 | 234 |
|---|---|
| Services billed | 413 across 62 procedure codes |
| Paid by Medicare | $87,929 |
Part D prescriptions in 2024
| Prescriptions (claims) | 66 · 66 30-day fills |
|---|---|
| Patients | 56 |
| Total drug cost | $435.68 |
| Generic share | 100% of claims |
Education and affiliations
| Medical school | University of California, San Francisco School of Medicine |
|---|---|
| Graduation year | 1996 |
| Medicare specialty | General Surgery |
Medical groups
- Sutter Bay Medical FoundationFremont, CA · 3,829 clinicians
- Washington Township Medical FoundationFremont, CA · 117 clinicians
Hospital affiliation
- Washington HospitalFremont, CA
Industry payments (Open Payments)
- 2025$927.81 · 6 payments from 1 company
- 2024$358.96 · 2 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Intuitive Surgical, Inc. | $927.81 | 6 |
What the 2025 payments were for
- Travel and Lodging$797.81 · 5 payments
- Food and Beverage$130.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 21 general surgeons in Fremont · All general surgeons in California