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

Steven Allen

Individual provider Hematology & Oncology Physician · NPI 1558491944

Steven Allen practises Hematology/Oncology in Lake Success, New York. Graduated from Johns Hopkins University School of Medicine in 1977, 49 years ago. Practices with North Shore Health System Medical Faculty Group Practice Inc, a 158-clinician group and accepts Medicare assignment. Licensed in New York.

Years since qualifying
49
Trained at
Johns Hopkins University School of Medicine
Licensed in
NY
In the registry since
2007
Claim this listing Report a problem Suggest an edit

Practice location Address checks out

450 Lakeville Road The Monter Cancer Ctr
Lake Success, NY 11042 Not confirmed with CMS for 19 years — call before visiting
Phone: (516) 734-8959
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence 134652 (NY)

Record details

NPI number1558491944
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedMarch 6, 2007
Last updated in NPPESJuly 8, 2007

Medicare enrollment

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

Medicare specialtyHEMATOLOGY/ONCOLOGY
Also practisesINTERNAL MEDICINE
Medical schoolJOHNS HOPKINS UNIVERSITY SCHOOL OF MEDICINE
Graduated 1977 (49 years in practice)
Group practice North Shore Health System Medical Faculty Group Practice Inc — 158 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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 patients315
Services billed 1,390 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

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 North Shore Health System Medical Faculty Group Practice Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 158 clinicians in the practice; 12 are shown here.

Other providers in Lake Success