Peter M. Rosenberg, M.D.
NPI 1104890664ActiveIndividual· Internal Medicine, Gastroenterology· Pasadena, CA
Internal Medicine, Gastroenterology (M.D.) in Pasadena, California, trained at Harvard Medical School (class of 1993). Their prescriptions cost Medicare Part D more than their services did: $599,674 for 847 claims, against $125,402 paid for services in 2024. Janssen Biotech, Inc. was the largest of 12 companies reporting payments in 2025, $2,044 in all, mostly food and beverage.
Overview
| NPI | 1104890664 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Feb 13, 2006 |
| Last updated in NPPES | Nov 30, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | G85196 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Gastroenterology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 451 |
|---|---|
| Services billed | 1,757 across 52 procedure codes |
| Paid by Medicare | $125,402 |
Part D prescriptions in 2024
| Prescriptions (claims) | 847 · 1,733 30-day fills |
|---|---|
| Patients | 189 |
| Total drug cost | $599,674 |
| Generic share | 81% of claims |
Education and affiliations
| Medical school | Harvard Medical School |
|---|---|
| Graduation year | 1993 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Genesis Healthcare Partners PCSan Francisco, CA · 228 clinicians
Hospital affiliation
- Huntington HospitalPasadena, CA
Industry payments (Open Payments)
- 2025$2,044 · 68 payments from 12 companies
- 2024$2,203 · 85 payments from 16 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $497.76 | 16 |
| Abbvie Inc. | $440.60 | 23 |
| Ardelyx, Inc. | $210.96 | 3 |
| Lilly USA, LLC | $187.40 | 7 |
| Novo Nordisk Inc | $183.66 | 3 |
What the 2025 payments were for
- Food and Beverage$1,960 · 67 payments
- Education$84.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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