Isabelle Nguyen, MD
NPI 1154920833ActiveIndividual· Internal Medicine· San Francisco, CA
Internal Medicine (MD) with Vituity Hospitalists PC, practicing in San Francisco, California. Part D covered 27 prescriptions written in 2024, 81% of them generic. Regeneron Healthcare Solutions, Inc. was the largest of 2 companies reporting payments in 2025, $118.39 in all, mostly food and beverage. Lists UCSF Health Saint Francis Hospital as a hospital affiliation.
Overview
| NPI | 1154920833 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Oct 22, 2020 |
| Last updated in NPPES | Jun 4, 2026 |
| Certified by provider | Jun 4, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A188101 | 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 - Internal Medicine (CA) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 27 · 31 30-day fills |
|---|---|
| Patients | 17 |
| Total drug cost | $3,055 |
| Generic share | 81% of claims |
Education and affiliations
| Graduation year | 2023 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical group
- Vituity Hospitalists PCRedwood City, CA · 79 clinicians
Hospital affiliation
- UCSF Health Saint Francis HospitalSan Francisco, CA
Industry payments (Open Payments)
- 2025$118.39 · 2 payments from 2 companies
- 2024$176.34 · 5 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Regeneron Healthcare Solutions, Inc. | $104.24 | 1 |
| Astrazeneca Pharmaceuticals LP | $14.15 | 1 |
What the 2025 payments were for
- Food and Beverage$118.39 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other internal medicine physicians in San Francisco
- 1003871724
- 1003872870
- 1013000868
- 1013067040
- 1013080167
- 1013320738
- 1023016292
- 1023291945
- 1023332988
- 1023404860
- 1033140702
- 1043384050
All 1,457 internal medicine physicians in San Francisco · All internal medicine physicians in California