Ian Roundtree, MD, PHD
NPI 1861028961 · Medical Oncology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ian Roundtree, MD, PHD is a Medical Oncology Physician provider in Boston, MA (NPI 1861028961).
Provider details
- NPI number
- 1861028961
- Entity type
- Individual
- Primary specialty
- Medical Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Male
- Sole proprietor
- No
- License
- 1023051 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
6 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
3 documented practice locations
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
Additional practice locations (2)
- 75 Francis StBoston, MA 02115-6106Phone: (617) 732-5500
- 1575 Cambridge StCambridge, MA 02138-4308Phone: (617) 726-2000
Registry dates
- Enumerated
- 2020-03-20
- Last updated
- 2026-03-09
- Certified
- 2026-03-09
Frequently asked questions
- What is Ian Roundtree's NPI number?
- Ian Roundtree's National Provider Identifier (NPI) is 1861028961, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ian Roundtree's specialty?
- Ian Roundtree is listed in the NPPES registry with a primary specialty of Medical Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Ian Roundtree located?
- Ian Roundtree's practice location on file with NPPES is 55 Fruit St, Boston, MA 02114-2696.
- What is Ian Roundtree's phone number?
- The practice phone number listed in the NPPES registry for Ian Roundtree is (617) 726-5820.
- Does Ian Roundtree accept Medicare?
- Ian Roundtree is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ian Roundtree's NPI active?
- Yes — Ian Roundtree's NPI (1861028961) is active in the NPPES registry as of the last update on 2026-03-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.