Wallace Chan, M.D.
NPI 1164624334 · Hematology & Oncology Physician · Greenvale, NY
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Wallace Chan, M.D. is a Hematology & Oncology Physician provider in Greenvale, NY (NPI 1164624334).
Provider details
- NPI number
- 1164624334
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 244953 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
3,012 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 1,072 | $8 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 538 | $148 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 379 | $107 |
| Red Blood Count, Automated Test85045 | 198 | $4 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 169 | $135 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'S |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydroxyurea | 45 | 12 |
| Prednisone | 31 | 17 |
| Osimertinib Mesylatebrand: Tagrisso | 24 | — |
| Dexamethasone | 19 | 11 |
| Oxycodone Hcl | 16 | — |
| Imatinib Mesylate | 15 | — |
| Ondansetronbrand: Ondansetron Odt | 15 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$553 across 23 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-06-01
- Last updated
- 2017-05-03
Frequently asked questions
- What is Wallace Chan's NPI number?
- Wallace Chan's National Provider Identifier (NPI) is 1164624334, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Wallace Chan's specialty?
- Wallace Chan is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Wallace Chan located?
- Wallace Chan's practice location on file with NPPES is 2200 Northern Blvd, Greenvale, NY 11548-1219.
- What is Wallace Chan's phone number?
- The practice phone number listed in the NPPES registry for Wallace Chan is (516) 325-7500.
- Does Wallace Chan accept Medicare?
- Wallace Chan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Wallace Chan's NPI active?
- Yes — Wallace Chan's NPI (1164624334) is active in the NPPES registry as of the last update on 2017-05-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.