IndividualActive
James Stewart, MD
NPI 1518928431 · Medical Oncology Physician · Springfield, MA
James Stewart, MD is a Medical Oncology Physician provider in Springfield, MA (NPI 1518928431).
Provider details
- NPI number
- 1518928431
- Entity type
- Individual
- Primary specialty
- Medical Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 236168 (MA)
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
20 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
3350 Main St
Springfield, MA 01107-1112
Phone: (413) 794-9338
Fax: (413) 794-9754
Street-level locationGet directions
Mailing address
280 Chestnut St
Springfield, MA 01199-1001
Registry dates
- Enumerated
- 2006-03-30
- Last updated
- 2016-11-14
Frequently asked questions
- What is James Stewart's NPI number?
- James Stewart's National Provider Identifier (NPI) is 1518928431, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Stewart's specialty?
- James Stewart is listed in the NPPES registry with a primary specialty of Medical Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is James Stewart located?
- James Stewart's practice location on file with NPPES is 3350 Main St, Springfield, MA 01107-1112.
- What is James Stewart's phone number?
- The practice phone number listed in the NPPES registry for James Stewart is (413) 794-9338.
- Is James Stewart's NPI active?
- Yes — James Stewart's NPI (1518928431) is active in the NPPES registry as of the last update on 2016-11-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.