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DR. STEVEN JOHN AMBRUSKO MD
NPI 1205047461
Pediatrics - Pediatric Hematology-Oncology in Buffalo, NY

Active since May 26, 2007PECOS Enrolled
ELM AT CARLTON STREETS, BUFFALO, NY 14263(716) 845-4447(716) 845-3588 Get Directions Write a Review

NPPES record last updated: January 6, 2021. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Steven John Ambrusko Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. STEVEN JOHN AMBRUSKO MD (NPI 1205047461) is an individual pediatric hematology-oncology provider in Buffalo, New York, licensed in New York (230423) and active in the NPI registry since May 2007. He is enrolled in Medicare PECOS and maintains a secondary practice location in Buffalo.

NPPES Registry Identity

NPI1205047461
Entity TypeIndividualMale
Primary Taxonomy2080P0207X
Provider Legal NameDR. STEVEN JOHN AMBRUSKOCredential: MD
Location AddressELM AT CARLTON STREETSBuffalo, NY 14263-2006
Mailing Address1001 Main St Fl 5Buffalo, NY 14203-1009 · (716) 323-0000 · Fax (716) 323-0290
Phone(716) 845-4447
Fax(716) 845-3588
Sole ProprietorNo
Enumeration DateMay 26, 2007
Last NPPES UpdateJanuary 6, 2021
NPPES CertifiedJanuary 6, 2021
✔ NPI 1205047461 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Pediatric Hematology-OncologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0207X
License✔ Licensed in NY · 230423
Definition
A pediatrician trained in the combination of pediatrics, hematology and oncology to recognize and manage pediatric blood disorders and cancerous diseases.
ELM AT CARLTON STREETS, Buffalo, NY 14263
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Secondary Practice Location 1

Location 1818 Ellicott StBuffalo, NY 14203-1021 · Phone (716) 323-2000

Other Identifiers 6

Other070905000009Fidelis
Other000529373002Bc/bs
Other000529373001Bc/bs
Other00028091301Univera
Other1214321Iha
Medicaid02903271NY

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Steven John Ambrusko Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

3

Medicare enrollment records show Steven Ambrusko reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Roswell Park Cancer Institute
9.1 mi
Multi-Specialty
ELM AND CARLTON ST
Buffalo, NY 14263
  • Reassigned Medicare billing, New York enrollment
  • 602 clinicians in this Medicare group
NPI 1720036593 (716) 845-2300
University At Buffalo Pediatric Associates Inc
9.2 mi
Pediatrics
1001 MAIN ST FL 4
Buffalo, NY 14203
  • Reassigned Medicare billing, New York enrollment
  • 217 clinicians in this Medicare group
NPI 1912928599 (716) 323-0225
Western New York Bloodcare, Inc.
9.2 mi
Clinic/Center
1010 MAIN ST STE 300
Buffalo, NY 14202
  • Reassigned Medicare billing, New York enrollment
  • 7 clinicians in this Medicare group
NPI 1952433757 (716) 896-2470

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Steven Ambrusko's NPI number?

The NPI number for Steven Ambrusko is 1205047461. It was assigned to this individual provider in the NPPES registry on May 26, 2007.

Where is Steven Ambrusko located?

Steven Ambrusko practices at Elm At Carlton Streets, Buffalo, NY 14263. The listed phone number is (716) 845-4447.

What is Steven Ambrusko's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Hematology-Oncology, with taxonomy code 2080P0207X.

Is Steven Ambrusko enrolled in Medicare?

Yes. Steven Ambrusko is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Steven Ambrusko's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Steven Ambrusko reassigns Medicare benefits to 3 organizations: Roswell Park Cancer Institute (Buffalo, NY), University At Buffalo Pediatric Associates Inc (Buffalo, NY) and Western New York Bloodcare, Inc. (Buffalo, NY). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Steven Ambrusko's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Steven Ambrusko was last updated on January 6, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.