Sonia Okuyama Sasaki, MD
NPI 1053520049ActiveIndividual· Internal Medicine, Hematology & Oncology· Denver, CO
Internal Medicine, Hematology & Oncology (MD) with Denver Health and Hospital Authority, practicing in Denver, Colorado. Their prescriptions cost Medicare Part D more than their services did: $927,410 for 265 claims, against $14,686 paid for services in 2024. Janssen Biotech, Inc. was the largest of 2 companies reporting payments in 2025, $163.30 in all, mostly food and beverage. Lists Denver Health & Hospital Authority and 1 other hospital as hospital affiliations.
Overview
| NPI | 1053520049 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 22, 2007 |
| Last updated in NPPES | Mar 6, 2021 |
| Certified by provider | Mar 6, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 49898 | CO |
| Internal Medicine, Medical Oncology | 207RX0202X | 49898 | CO |
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/Oncology (CO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 76 |
|---|---|
| Services billed | 184 across 14 procedure codes |
| Paid by Medicare | $14,686 |
Part D prescriptions in 2024
| Prescriptions (claims) | 265 · 385 30-day fills |
|---|---|
| Patients | 61 |
| Total drug cost | $927,410 |
| Generic share | 65% of claims |
Education and affiliations
| Graduation year | 2004 |
|---|---|
| Medicare specialty | Hematology/Oncology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Denver Health and Hospital AuthorityDenver, CO · 849 clinicians
Hospital affiliations
- Denver Health & Hospital AuthorityDenver, CO
- Saint Joseph HospitalDenver, CO
Industry payments (Open Payments)
- 2025$163.30 · 2 payments from 2 companies
- 2024$118.99 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $135.04 | 1 |
| Tempus Ai, Inc | $28.26 | 1 |
What the 2025 payments were for
- Food and Beverage$163.30 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other hematologist-oncologists in Denver
- 1033193180
- 1053395624
- 1063656726
- 1073632675
- 1104112515
- 1134103476
- 1134446461
- 1194815050
- 1245671700
- 1245765643
- 1306820022
- 1316921976
All 71 hematologist-oncologists in Denver · All hematologist-oncologists in Colorado