Jeffrey Zheng-Hsien Ko, M.D.
NPI 1104203405ActiveIndividual· Internal Medicine, Gastroenterology· Sacramento, CA
Internal Medicine, Gastroenterology (M.D.) in Sacramento, California, trained at St. Louis College of Physicians and Surgeons (class of 2015). In 2024 Medicare paid $61,744 for 365 patients, and Part D covered 183 of their prescriptions, 85% of them generic. Conmed Corporation was the largest of 4 companies reporting payments in 2025, $351.65 in all, mostly food and beverage.
Overview
| NPI | 1104203405 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 6, 2015 |
| Last updated in NPPES | Jul 27, 2022 |
| Certified by provider | Jul 27, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | C144966 | CA |
| Internal Medicine | 207R00000X | C144966 | 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 - Gastroenterology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 365 |
|---|---|
| Services billed | 665 across 51 procedure codes |
| Paid by Medicare | $61,744 |
Part D prescriptions in 2024
| Prescriptions (claims) | 183 · 233 30-day fills |
|---|---|
| Patients | 113 |
| Total drug cost | $7,047 |
| Generic share | 85% of claims |
Education and affiliations
| Medical school | St. Louis College of Physicians and Surgeons |
|---|---|
| Graduation year | 2015 |
| Medicare specialty | Gastroenterology |
Medical groups
- Regents of the Univ of CaSacramento, CA · 1,584 clinicians
- Regents of the University of CaliforniaSacramento, CA · 567 clinicians
Hospital affiliation
- University of California Davis Medical CenterSacramento, CA
Industry payments (Open Payments)
- 2025$351.65 · 4 payments from 4 companies
- 2024$112.21 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Conmed Corporation | $153.67 | 1 |
| Genzyme Corporation | $122.31 | 1 |
| Madrigal Pharmaceuticals | $41.00 | 1 |
| Fujifilm Healthcare Americas Corporation | $34.67 | 1 |
What the 2025 payments were for
- Food and Beverage$351.65 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 100 gastroenterologists in Sacramento · All gastroenterologists in California