Wallace Peter Chan, M.D.
NPI 1164624334ActiveIndividual· Internal Medicine, Hematology & Oncology· Greenvale, NY
Internal Medicine, Hematology & Oncology (M.D.) with Chs Physician Partners PC, practicing in Greenvale, New York. Their prescriptions cost Medicare Part D more than their services did: $1,371,333 for 414 claims, against $191,364 paid for services in 2024. Merck Sharp & Dohme LLC was the largest of 16 companies reporting payments in 2025, $590.95 in all, mostly food and beverage. Lists Chsli St Joseph Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1164624334 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 1, 2007 |
| Last updated in NPPES | May 3, 2017 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 244953 | NY |
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 (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 584 |
|---|---|
| Services billed | 3,080 across 26 procedure codes |
| Paid by Medicare | $191,364 |
Part D prescriptions in 2024
| Prescriptions (claims) | 414 · 532 30-day fills |
|---|---|
| Patients | 98 |
| Total drug cost | $1,371,333 |
| Generic share | 72% of claims |
Education and affiliations
| Graduation year | 1999 |
|---|---|
| Medicare specialty | Hematology/Oncology |
Medical group
- Chs Physician Partners PCRoslyn, NY · 743 clinicians
Hospital affiliations
- Chsli St Joseph HospitalBethpage, NY
- St Francis Hospital - the Heart CenterRoslyn, NY
Other facilities
- Good Shepherd HospiceHospice · Farmingdale, NY
Industry payments (Open Payments)
- 2025$590.95 · 24 payments from 16 companies
- 2024$553.30 · 23 payments from 14 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $96.50 | 3 |
| Novartis Pharmaceuticals Corporation | $75.09 | 4 |
| Agios Pharmaceuticals, Inc. | $67.89 | 3 |
| Tempus Ai, Inc | $45.10 | 2 |
| Geron Corporation | $37.19 | 1 |
What the 2025 payments were for
- Food and Beverage$590.95 · 24 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other hematologist-oncologists in Greenvale
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