Adam Giermasz, M.D., PHD
NPI 1831374644ActiveIndividual· Internal Medicine, Hematology & Oncology· Sacramento, CA
Internal Medicine, Hematology & Oncology (M.D., PHD) with Regents of the Univ of Ca and 1 other group, practicing in Sacramento, California. Their prescriptions cost Medicare Part D more than their services did: $252,987 for 230 claims, against $31,302 paid for services in 2024. Novo Nordisk Inc was the largest of 6 companies reporting payments in 2025, $43,704 in all, mostly speaking and faculty fees. Lists University of California Davis Medical Center as a hospital affiliation.
Overview
| NPI | 1831374644 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D., PHD |
| Sole proprietor | No |
| NPI issued | Dec 31, 2007 |
| Last updated in NPPES | Sep 18, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | A103790 | 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 - Hematology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 208 |
|---|---|
| Services billed | 392 across 21 procedure codes |
| Paid by Medicare | $31,302 |
Part D prescriptions in 2024
| Prescriptions (claims) | 230 · 466 30-day fills |
|---|---|
| Patients | 56 |
| Total drug cost | $252,987 |
| Generic share | 11% of claims |
Education and affiliations
| Graduation year | 1998 |
|---|---|
| Medicare specialty | Hematology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical groups
- Regents of the Univ of CaSacramento, CA · 1,584 clinicians
- Regents of the University of CaliforniaSacramento, CA · 567 clinicians
Hospital affiliation
- University of California Davis Medical CenterSacramento, CA
Industry payments (Open Payments)
- 2025$43,704 · 35 payments from 6 companies
- 2024$114,115 · 71 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $12,138 | 6 |
| Genzyme Corporation | $11,527 | 9 |
| Alexion Pharmaceuticals, Inc. | $9,050 | 12 |
| Biomarin Pharmaceutical Inc. | $8,212 | 6 |
| Csl Behring | $2,697 | 1 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$19,819 · 7 payments
- Consulting Fee$19,131 · 8 payments
- Travel and Lodging$4,139 · 11 payments
- Food and Beverage$615.37 · 9 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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