Oleg I. Krijanovski, MD, PHD
NPI 1841376704ActiveIndividual· Internal Medicine, Hematology & Oncology· Berkeley, CA
Internal Medicine, Hematology & Oncology (MD, PHD) with Sutter Bay Medical Foundation and 1 other group, practicing in Berkeley, California. Their prescriptions cost Medicare Part D more than their services did: $6,527,547 for 1,879 claims, against $199,386 paid for services in 2024. Genmab U.S., Inc. was the largest of 12 companies reporting payments in 2025, $2,057 in all, mostly consulting fees. Lists Alta Bates Summit Medical Center and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1841376704 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD, PHD |
| Sole proprietor | No |
| NPI issued | Oct 31, 2006 |
| Last updated in NPPES | Feb 7, 2025 |
| Certified by provider | Feb 7, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | A105568 | CA |
| Internal Medicine | 207R00000X | 4301074606 | MI |
| Internal Medicine, Medical Oncology | 207RX0202X | 4301074606 | MI |
| Internal Medicine, Medical Oncology | 207RX0202X | A105568 | 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 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Hematology/Oncology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 428 |
|---|---|
| Services billed | 3,232 across 25 procedure codes |
| Paid by Medicare | $199,386 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,879 · 2,402 30-day fills |
|---|---|
| Patients | 168 |
| Total drug cost | $6,527,547 |
| Generic share | 68% of claims |
Education and affiliations
| Graduation year | 1985 |
|---|---|
| Medicare specialty | Hematology/Oncology |
| Secondary specialties | Internal Medicine |
Medical groups
- Sutter Bay Medical FoundationFremont, CA · 3,829 clinicians
- Sutter Valley Medical FoundationModesto, CA · 2,500 clinicians
Hospital affiliations
- Alta Bates Summit Medical CenterOakland, CA
- Alta Bates Summit Medical Center - Alta Bates CampBerkeley, CA
- Eden Medical CenterCastro Valley, CA
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA
- Sutter Medical Center, SacramentoSacramento, CA
Other facilities
- Sutter Care at HomeHome health agency · Concord, CA
Industry payments (Open Payments)
- 2025$2,057 · 21 payments from 12 companies
- 2024$506.48 · 9 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genmab U.S., Inc. | $1,529 | 4 |
| E.R. Squibb & Sons, L.L.C. | $142.38 | 2 |
| Takeda Pharmaceuticals U.S.A., Inc. | $97.96 | 3 |
| Abbvie Inc. | $53.50 | 2 |
| Daiichi Sankyo Inc. | $43.97 | 2 |
What the 2025 payments were for
- Consulting Fee$1,365 · 1 payment
- Food and Beverage$647.56 · 18 payments
- Education$23.10 · 1 payment
- Travel and Lodging$21.25 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Hematology & Oncology providers in Berkeley
- 1043208457
- 1104844174
- 1679004543
- 1780672048
- 1396823167
- 1487857595
- 1881626687
- 1629381819
- 1679947949
- 1750487385
- 1669482576
All Internal Medicine, Hematology & Oncology providers in California →