Silvana Marisa Giannelli, MD
NPI 1821295247ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· Rancho Cucamonga, CA
Internal Medicine, Endocrinology, Diabetes & Metabolism (MD) in Rancho Cucamonga, California, licensed in CA, with an NPI issued in June 2007. Their prescriptions cost Medicare Part D more than their services did: $531,146 for 1,573 claims, against $32,379 paid for services in 2024. Amgen Inc. was the largest of 5 companies reporting payments in 2025, $222.63 in all, mostly food and beverage. Lists Eisenhower Medical Center and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1821295247 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 29, 2007 |
| Last updated in NPPES | May 13, 2025 |
| Certified by provider | May 13, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | A109512 | 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 - Endocrinology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 147 |
|---|---|
| Services billed | 511 across 16 procedure codes |
| Paid by Medicare | $32,379 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,573 · 3,593 30-day fills |
|---|---|
| Patients | 196 |
| Total drug cost | $531,146 |
| Generic share | 52% of claims |
Education and affiliations
| Graduation year | 2005 |
|---|---|
| Medicare specialty | Endocrinology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Hospital affiliations
- Eisenhower Medical CenterRancho Mirage, CA
- Loma Linda University Medical CenterLoma Linda, CA
- Pomona Valley Hospital Medical CenterPomona, CA
- San Antonio Regional HospitalUpland, CA
Industry payments (Open Payments)
- 2025$222.63 · 5 payments from 5 companies
- 2024$33.69 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $121.82 | 1 |
| Antares Pharma, Inc. | $34.04 | 1 |
| Radius Health, Inc. | $29.69 | 1 |
| Novo Nordisk Inc | $22.57 | 1 |
| Insulet Corporation | $14.51 | 1 |
What the 2025 payments were for
- Food and Beverage$222.63 · 5 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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