Russell Sundby, MD
NPI 1275952020 · Pediatric Hematology & Oncology Physician · Bethesda, MD
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Russell Sundby, MD is a Pediatric Hematology & Oncology Physician provider in Bethesda, MD (NPI 1275952020).
Provider details
- NPI number
- 1275952020
- Entity type
- Individual
- Primary specialty
- Pediatric Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- D0085726 (MD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
12 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
- 2014-04-09
- Last updated
- 2025-02-15
- Certified
- 2025-02-15
Frequently asked questions
- What is Russell Sundby's NPI number?
- Russell Sundby's National Provider Identifier (NPI) is 1275952020, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Russell Sundby's specialty?
- Russell Sundby is listed in the NPPES registry with a primary specialty of Pediatric Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Russell Sundby located?
- Russell Sundby's practice location on file with NPPES is 10 Center Dr Bldg 10, Bethesda, MD 20892-0004.
- What is Russell Sundby's phone number?
- The practice phone number listed in the NPPES registry for Russell Sundby is (301) 219-3758.
- Does Russell Sundby accept Medicare?
- Russell Sundby is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Russell Sundby's NPI active?
- Yes — Russell Sundby's NPI (1275952020) is active in the NPPES registry as of the last update on 2025-02-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.