Robert Zimmerman, M.D.
NPI 1619294352ActiveIndividual· Internal Medicine, Infectious Disease· Sacramento, CA
Internal Medicine, Infectious Disease (M.D.) in Sacramento, California, trained at University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) (class of 2010). Their prescriptions cost Medicare Part D more than their services did: $582,983 for 677 claims, against $103,069 paid for services in 2024. Gilead Sciences, Inc. reported $630.17 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1619294352 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Apr 20, 2010 |
| Last updated in NPPES | Oct 14, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Infectious Disease Primary | 207RI0200X | A118958 | 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 | 378 |
|---|---|
| Services billed | 1,235 across 10 procedure codes |
| Paid by Medicare | $103,069 |
Part D prescriptions in 2024
| Prescriptions (claims) | 677 · 850 30-day fills |
|---|---|
| Patients | 84 |
| Total drug cost | $582,983 |
| Generic share | 74% of claims |
Education and affiliations
| Medical school | University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) |
|---|---|
| Graduation year | 2010 |
| Medicare specialty | Infectious Disease |
| Telehealth | Offers telehealth |
Medical group
- Dignity Health Medical FoundationFolsom, CA · 1,184 clinicians
Hospital affiliations
- Mercy General HospitalSacramento, CA
- Mercy Hospital of FolsomFolsom, CA
- Mercy San Juan Medical CenterCarmichael, CA
- Methodist Hospital of SacramentoSacramento, CA
Industry payments (Open Payments)
- 2025$630.17 · 16 payments from 1 company
- 2024$470.64 · 19 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Gilead Sciences, Inc. | $630.17 | 16 |
What the 2025 payments were for
- Food and Beverage$630.17 · 16 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 57 infectious disease specialists in Sacramento · All infectious disease specialists in California