Catherine Maikhanh Nguyen, MD
NPI 1295199552ActiveIndividual· Dermatology· Orange, CA
Dermatology (MD) with Providence Medical Foundation, practicing in Orange, California. Their prescriptions cost Medicare Part D more than their services did: $363,939 for 795 claims, against $47,658 paid for services in 2024. Genzyme Corporation was the largest of 10 companies reporting payments in 2025, $1,518 in all, mostly food and beverage. Lists Saint John's Health Center as a hospital affiliation.
Overview
| NPI | 1295199552 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 12, 2016 |
| Last updated in NPPES | Nov 9, 2021 |
| Certified by provider | Nov 9, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Dermatology Primary | 207N00000X | A168431 | 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 - Dermatology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 146 |
|---|---|
| Services billed | 826 across 32 procedure codes |
| Paid by Medicare | $47,658 |
Part D prescriptions in 2024
| Prescriptions (claims) | 795 · 873 30-day fills |
|---|---|
| Patients | 319 |
| Total drug cost | $363,939 |
| Generic share | 93% of claims |
Education and affiliations
| Graduation year | 2016 |
|---|---|
| Medicare specialty | Dermatology |
| Telehealth | Offers telehealth |
Medical group
- Providence Medical FoundationVictorville, CA · 1,466 clinicians
Hospital affiliation
- Saint John's Health CenterSanta Monica, CA
Industry payments (Open Payments)
- 2025$1,518 · 58 payments from 10 companies
- 2024$1,450 · 59 payments from 11 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genzyme Corporation | $348.47 | 6 |
| Abbvie Inc. | $231.54 | 13 |
| Novartis Pharmaceuticals Corporation | $211.32 | 11 |
| Janssen Biotech, Inc. | $208.13 | 9 |
| Ucb, Inc. | $204.87 | 7 |
What the 2025 payments were for
- Food and Beverage$1,508 · 57 payments
- Education$9.65 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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