Mary Y. Hu, M.D.
NPI 1659339059ActiveIndividual· Internal Medicine, Gastroenterology· Fremont, CA
Internal Medicine, Gastroenterology (M.D.) in Fremont, California, trained at Harvard Medical School (class of 2002). Their prescriptions cost Medicare Part D more than their services did: $228,857 for 681 claims, against $44,053 paid for services in 2024. Janssen Biotech, Inc. reported $105.39 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1659339059 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 3, 2006 |
| Last updated in NPPES | May 27, 2020 |
| Certified by provider | May 27, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | A84011 | 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 - Gastroenterology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 196 |
|---|---|
| Services billed | 389 across 23 procedure codes |
| Paid by Medicare | $44,053 |
Part D prescriptions in 2024
| Prescriptions (claims) | 681 · 1,356 30-day fills |
|---|---|
| Patients | 217 |
| Total drug cost | $228,857 |
| Generic share | 84% of claims |
Education and affiliations
| Medical school | Harvard Medical School |
|---|---|
| Graduation year | 2002 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Sutter Bay Medical FoundationFremont, CA · 3,829 clinicians
Hospital affiliation
- Washington HospitalFremont, CA
Industry payments (Open Payments)
- 2025$105.39 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $105.39 | 1 |
What the 2025 payments were for
- Food and Beverage$105.39 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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