Klemens Nguyen Huynh, M.D.
NPI 1184652935ActiveIndividual· Internal Medicine, Nephrology· Highland, CA
Internal Medicine, Nephrology (M.D.) in Highland, California, trained at University of California, Geffen School of Medicine (class of 1997). Their prescriptions cost Medicare Part D more than their services did: $397,637 for 1,339 claims, against $160,475 paid for services in 2024. Mallinckrodt Hospital Products Inc. was the largest of 18 companies reporting payments in 2025, $2,488 in all, mostly food and beverage.
Overview
| NPI | 1184652935 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 29, 2006 |
| Last updated in NPPES | Oct 23, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | A69249 | 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 - Nephrology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 342 |
|---|---|
| Services billed | 1,588 across 28 procedure codes |
| Paid by Medicare | $160,475 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,339 · 3,208 30-day fills |
|---|---|
| Patients | 184 |
| Total drug cost | $397,637 |
| Generic share | 73% of claims |
Education and affiliations
| Medical school | University of California, Geffen School of Medicine |
|---|---|
| Graduation year | 1997 |
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
Medical group
- Nephrology Associates Medical Group IncTemecula, CA · 64 clinicians
Hospital affiliations
- Community Hospital of San BernardinoSan Bernardino, CA
- Redlands Community HospitalRedlands, CA
- San Gorgonio Memorial HospitalBanning, CA
- St Bernardine Medical CenterSan Bernardino, CA
Other facilities
- Davita Highland Ranch Dialysis CenterDialysis facility · Highland, CA
Industry payments (Open Payments)
- 2025$2,488 · 78 payments from 18 companies
- 2024$2,848 · 86 payments from 17 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Mallinckrodt Hospital Products Inc. | $573.62 | 13 |
| Ardelyx, Inc. | $351.04 | 10 |
| Travere Therapeutics, Inc. | $272.81 | 6 |
| Bayer Healthcare Pharmaceuticals Inc. | $270.16 | 8 |
| Astrazeneca Pharmaceuticals LP | $224.44 | 11 |
What the 2025 payments were for
- Food and Beverage$2,388 · 77 payments
- Education$99.99 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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