1. Home
  2. Directory
  3. Maryland
  4. Frederick
  5. Internal Medicine
  6. NPI Profile

MARC STUART ERNSTOFF MD
NPI 1275549073
Internal Medicine - Medical Oncology in Frederick, MD

Active since August 01, 2006
5014 JUDICIAL WAY, FREDERICK, MD 21703(216) 559-6577 Get Directions Write a Review

NPPES record last updated: July 26, 2022. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jul 26, 2022, Sep 30, 2020, Jul 15, 2019 and 1 more (4 updates tracked since 2016).

About Marc Stuart Ernstoff Md NPPES

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

MARC STUART ERNSTOFF MD (NPI 1275549073) is an individual medical oncology provider in Frederick, Maryland, licensed in New York (138461) and active in the NPI registry since August 2006.

NPPES Registry Identity

NPI1275549073
Entity TypeIndividualMale
Primary Taxonomy207RX0202X
Provider Legal NameMARC STUART ERNSTOFFCredential: MD
Location Address5014 JUDICIAL WAYFrederick, MD 21703-4807
Mailing Address846 Main Street, Unit 1dBuffalo, NY 14202-0001 · (216) 559-6577
Phone(216) 559-6577
Sole ProprietorNo
Enumeration DateAugust 1, 2006
Last NPPES UpdateJuly 26, 20224 updates tracked since enumeration
NPPES CertifiedJuly 26, 2022
✔ NPI 1275549073 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 NY · 138461
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.
5014 JUDICIAL WAY, Frederick, MD 21703
Open in Google Maps ↗

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 Marc Ernstoff's NPI number?

The NPI number for Marc Ernstoff is 1275549073. It was assigned to this individual provider in the NPPES registry on August 1, 2006.

Where is Marc Ernstoff located?

Marc Ernstoff practices at 5014 Judicial Way, Frederick, MD 21703. The listed phone number is (216) 559-6577.

What is Marc Ernstoff's specialty?

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

When was this NPI record last updated?

The NPPES record for Marc Ernstoff was last updated on July 26, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.