Nathan L. Lewis, MD
NPI 1912923004ActiveIndividual· Internal Medicine· Pasadena, CA
Internal Medicine (MD) in Pasadena, California, trained at Loma Linda University School of Medicine (class of 1978). Their prescriptions cost Medicare Part D more than their services did: $443,988 for 5,629 claims, against $58,587 paid for services in 2024. Madrigal Pharmaceuticals was the largest of 5 companies reporting payments in 2025, $292.65 in all, mostly food and beverage.
Overview
| NPI | 1912923004 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Jul 14, 2006 |
| Last updated in NPPES | Oct 23, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | G40994 | 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) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 165 |
|---|---|
| Services billed | 634 across 13 procedure codes |
| Paid by Medicare | $58,587 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,629 · 10,099 30-day fills |
|---|---|
| Patients | 336 |
| Total drug cost | $443,988 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | Loma Linda University School of Medicine |
|---|---|
| Graduation year | 1978 |
| Medicare specialty | Internal Medicine |
Hospital affiliation
- Huntington HospitalPasadena, CA
Other facilities
- True Care Home Health Agency, IncHome health agency · Duarte, CA
- Generation Care, IncHospice · Thousand Oaks, CA
- Cedar Pine Post AcuteNursing home · Pasadena, CA
- Golden Rose Care CenterNursing home · Pasadena, CA
- The Californian Pasadena HealthcareNursing home · Pasadena, CA
- Villa Gardens Health Care UnitNursing home · Pasadena, CA
Industry payments (Open Payments)
- 2025$292.65 · 9 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Madrigal Pharmaceuticals | $120.99 | 1 |
| Amgen Inc. | $85.85 | 4 |
| Astrazeneca Pharmaceuticals LP | $36.75 | 2 |
| Novo Nordisk Inc | $32.27 | 1 |
| Ibsa Pharma Inc. | $16.79 | 1 |
What the 2025 payments were for
- Food and Beverage$260.38 · 8 payments
- Education$32.27 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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