Ramesh V. Nathan, MD
NPI 1215025291ActiveIndividual· Internal Medicine, Infectious Disease· Thousand Oaks, CA
Internal Medicine, Infectious Disease (MD) in Thousand Oaks, California, trained at George Washington University School of Medicine (class of 2000). In 2024 Medicare paid $536,472 for 691 patients, and Part D covered 1,908 of their prescriptions, 87% of them generic. Ferring Pharmaceuticals Inc. was the largest of 3 companies reporting payments in 2025, $194.60 in all, mostly food and beverage.
Overview
| NPI | 1215025291 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Oct 11, 2006 |
| Last updated in NPPES | Aug 18, 2025 |
| Certified by provider | Aug 18, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Infectious Disease Primary | 207RI0200X | A77898 | 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 - Infectious Disease (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 691 |
|---|---|
| Services billed | 70,291 across 52 procedure codes |
| Paid by Medicare | $536,472 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,908 · 3,250 30-day fills |
|---|---|
| Patients | 214 |
| Total drug cost | $218,655 |
| Generic share | 87% of claims |
Education and affiliations
| Medical school | George Washington University School of Medicine |
|---|---|
| Graduation year | 2000 |
| Medicare specialty | Infectious Disease |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Mark H Mazur MD and Barry Statner MD A Professional CorporationThousand Oaks, CA · 15 clinicians
Hospital affiliations
- Adventist Health Simi ValleySimi Valley, CA
- Los Robles Hospital & Medical CenterThousand Oaks, CA
- Northridge Hospital Medical CenterNorthridge, CA
Other facilities
- Access Tlc Home Health CareHome health agency · San Fernando, CA
- Angels of Summit Home HealthHome health agency · Simi Valley, CA
- Assisted Home CareHome health agency · Mission Hills, CA
Industry payments (Open Payments)
- 2025$194.60 · 6 payments from 3 companies
- 2024$95.62 · 4 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Ferring Pharmaceuticals Inc. | $100.53 | 1 |
| Abbvie Inc. | $48.18 | 3 |
| Paratek Pharmaceuticals, Inc. | $45.89 | 2 |
What the 2025 payments were for
- Food and Beverage$194.60 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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