IndividualActive
Marc Ernstoff, MD
NPI 1275549073 · Medical Oncology Physician · Frederick, MD
Marc Ernstoff, MD is a Medical Oncology Physician provider in Frederick, MD (NPI 1275549073).
Provider details
- NPI number
- 1275549073
- Entity type
- Individual
- Primary specialty
- Medical Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 138461 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
5014 Judicial Way
Frederick, MD 21703-4807
Phone: (216) 559-6577
Street-level locationGet directions
Mailing address
846 Main Street
Buffalo, NY 14202-0001
Registry dates
- Enumerated
- 2006-08-01
- Last updated
- 2022-07-26
- Certified
- 2022-07-26
Frequently asked questions
- What is Marc Ernstoff's NPI number?
- Marc Ernstoff's National Provider Identifier (NPI) is 1275549073, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marc Ernstoff's specialty?
- Marc Ernstoff is listed in the NPPES registry with a primary specialty of Medical Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Marc Ernstoff located?
- Marc Ernstoff's practice location on file with NPPES is 5014 Judicial Way, Frederick, MD 21703-4807.
- What is Marc Ernstoff's phone number?
- The practice phone number listed in the NPPES registry for Marc Ernstoff is (216) 559-6577.
- Is Marc Ernstoff's NPI active?
- Yes — Marc Ernstoff's NPI (1275549073) is active in the NPPES registry as of the last update on 2022-07-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.