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STEPHEN M ABO D O LLC
NPI 1285057810
Internal Medicine - Medical Oncology in Montclair, NJ

Active since February 03, 2014
1 BAY AVE, SUITE 1, MONTCLAIR, NJ 07042(973) 259-3555(973) 839-3653 Get Directions Write a Review

NPPES record last updated: April 28, 2014. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Stephen M Abo D O Llc NPPES

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

STEPHEN M ABO D O LLC (NPI 1285057810) is a healthcare organization registered as a medical oncology in Montclair, New Jersey and active in the NPI registry since February 2014. The organization lists Stephen M Abo, President, as its authorized official.

NPPES Registry Identity

NPI1285057810
Entity TypeOrganization
Primary Taxonomy207RX0202X
Legal Business NameSTEPHEN M ABO D O LLC
Location Address1 BAY AVE, SUITE 1Montclair, NJ 07042-4837
Mailing Address713 Girard AveWestfield, NJ 07090-2309 · (973) 839-1003 · Fax (973) 839-3653
Phone(973) 259-3555
Fax(973) 839-3653
Organization SubpartNo
Authorized OfficialStephen M AboPresident · (973) 839-1003
Enumeration DateFebruary 3, 2014
Last NPPES UpdateApril 28, 2014
✔ NPI 1285057810 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Medical OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RX0202X
License✔ Licensed in NJ · 25MB07545100
Definition
An internist who specializes in the diagnosis and treatment of all types of cancer and other benign and malignant tumors. This specialist decides on and administers therapy for these malignancies as well as consults with surgeons and radiotherapists on other treatments for cancer.
1 BAY AVE, Montclair, NJ 07042
Open in Google Maps ↗

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Stephen M Abo D O Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Stephen M Abo D O LLC, which bills Medicare for the services this clinician delivers.

Clinician (1)

Stephen Abo, D.O.
Hematology/Oncology
NPI 1891717708
111 CENTRAL AVE. CANCER CENTER
Newark, NJ 07102
(973) 877-2829
✔ PECOS✔ Accepts Medicare5.0 mi

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 Stephen M Abo D O LLC's NPI number?

The NPI number for Stephen M Abo D O LLC is 1285057810. It was assigned to this organization in the NPPES registry on February 3, 2014.

Where is Stephen M Abo D O LLC located?

Stephen M Abo D O LLC is located at 1 Bay Ave Suite 1, Montclair, NJ 07042. The listed phone number is (973) 259-3555.

What is Stephen M Abo D O LLC's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.

Is Stephen M Abo D O LLC enrolled in Medicare?

Yes. Stephen M Abo D O LLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Stephen M Abo D O LLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Hematology/Oncology) reassigns their Medicare billing to Stephen M Abo D O LLC. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Stephen M Abo D O LLC was last updated on April 28, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.