Johnny Nguyen Do, M.D.
NPI 1235371675ActiveIndividual· Internal Medicine· Orange, CA
Internal Medicine (M.D.) in Orange, California, trained at Eastern Virginia Medical School (class of 2007). In 2024 Medicare paid $48,835 for 227 patients, and Part D covered 512 of their prescriptions, 89% of them generic. Pfizer Inc. was the largest of 2 companies reporting payments in 2025, $87.95 in all, mostly food and beverage.
Overview
| NPI | 1235371675 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Mar 31, 2009 |
| Last updated in NPPES | Oct 21, 2021 |
| Certified by provider | Oct 21, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A107046 | CA |
| Internal Medicine | 207R00000X | MD60335318 | WA |
| Pediatrics | 208000000X | MD60335318 | WA |
| Hospitalist | 208M00000X | MD60335318 | WA |
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); Practitioner - Internal Medicine (OR) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 227 |
|---|---|
| Services billed | 608 across 13 procedure codes |
| Paid by Medicare | $48,835 |
Part D prescriptions in 2024
| Prescriptions (claims) | 512 · 556 30-day fills |
|---|---|
| Patients | 219 |
| Total drug cost | $21,419 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | Eastern Virginia Medical School |
|---|---|
| Graduation year | 2007 |
| Medicare specialty | Internal Medicine |
Medical group
- Providence Medical FoundationVictorville, CA · 1,466 clinicians
Hospital affiliation
- Providence St. Joseph HospitalOrange, CA
Industry payments (Open Payments)
- 2025$87.95 · 3 payments from 2 companies
- 2024$76.24 · 3 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $65.11 | 2 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $22.84 | 1 |
What the 2025 payments were for
- Food and Beverage$87.95 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 224 internal medicine physicians in Orange · All internal medicine physicians in California