Gregory Krastein, MD
NPI 1942358759ActiveIndividual· Internal Medicine, Nephrology· Oxnard, CA
Internal Medicine, Nephrology (MD) in Oxnard, California, trained at George Washington University School of Medicine (class of 1990). Their prescriptions cost Medicare Part D more than their services did: $107,373 for 1,205 claims, against $8,416 paid for services in 2024. Janssen Pharmaceuticals, Inc was the largest of 2 companies reporting payments in 2024, $185.53 in all, mostly food and beverage.
Overview
| NPI | 1942358759 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jan 8, 2007 |
| Last updated in NPPES | Feb 21, 2023 |
| Certified by provider | Feb 14, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | G70211 | 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); Practitioner - Nephrology (HI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 46 |
|---|---|
| Services billed | 88 across 11 procedure codes |
| Paid by Medicare | $8,416 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,205 · 3,142 30-day fills |
|---|---|
| Patients | 287 |
| Total drug cost | $107,373 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | George Washington University School of Medicine |
|---|---|
| Graduation year | 1990 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Southern California Permanente Medical GroupRedlands, CA · 11,293 clinicians
Industry payments (Open Payments)
- 2024$185.53 · 4 payments from 2 companies
Top paying companies in 2024
| Company | Amount | Payments |
|---|---|---|
| Janssen Pharmaceuticals, Inc | $124.37 | 1 |
| Novo Nordisk Inc | $61.16 | 3 |
What the 2024 payments were for
- Food and Beverage$185.53 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other nephrologists in Oxnard
- 1215966999
- 1306074927
- 1386718799
- 1588738991
- 1669561536
- 1922201003
- 1346314754
- 1457425860
- 1942239694
- 1235203647
- 1558318881