Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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Michael Willen, MD

Individual provider Hematology & Oncology Physician · NPI 1912994849

Michael Willen, MD practises Hematology/Oncology in Clifton Park, New York. Graduated from New York Medical College in 1976, 50 years ago. Practices with New York Oncology Hematology PC, a 82-clinician group and accepts Medicare assignment. Licensed in New York.

Years since qualifying
50
Trained at
New York Medical College
Licensed in
NY
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

3 Crossing Blvd Ste 1
Clifton Park, NY 12065-4154
Phone: (518) 831-4434
Fax: (518) 831-4435
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence 131246 (NY)

Record details

NPI number1912994849
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedOctober 5, 2005
Last updated in NPPESMarch 20, 2019

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyHEMATOLOGY/ONCOLOGY
Medical schoolNEW YORK MEDICAL COLLEGE
Graduated 1976 (50 years in practice)
Group practice New York Oncology Hematology Pc — 82 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients61
Services billed 99 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at New York Oncology Hematology PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 82 clinicians in the practice; 12 are shown here.

Other providers in Clifton Park