Marvin Feldman, MD
NPI 1336254424 · Hematology & Oncology Physician · Baltimore, MD
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marvin Feldman, MD is a Hematology & Oncology Physician provider in Baltimore, MD (NPI 1336254424).
Provider details
- NPI number
- 1336254424
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- D07930 (MD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
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
Mailing address
Registry dates
- Enumerated
- 2006-08-20
- Last updated
- 2007-07-08
Frequently asked questions
- What is Marvin Feldman's NPI number?
- Marvin Feldman's National Provider Identifier (NPI) is 1336254424, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marvin Feldman's specialty?
- Marvin Feldman is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Marvin Feldman located?
- Marvin Feldman's practice location on file with NPPES is 227 St Paul Place, Baltimore, MD 21202-2001.
- What is Marvin Feldman's phone number?
- The practice phone number listed in the NPPES registry for Marvin Feldman is (410) 783-5858.
- Does Marvin Feldman accept Medicare?
- Marvin Feldman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marvin Feldman's NPI active?
- Yes — Marvin Feldman's NPI (1336254424) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.