William Freed-Pastor, MD, PHD
NPI 1982041117 · Internal Medicine Physician · Boston, MA
Enrolled with Medicare as Practitioner - Medical Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Freed-Pastor, MD, PHD is a Internal Medicine Physician provider in Boston, MA (NPI 1982041117).
Provider details
- NPI number
- 1982041117
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Male
- Sole proprietor
- No
- License
- L-255592 (MA)
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
13 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 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 (1)
- Massachusetts General Hospital55 Fruit St.Boston, MA 02114Phone: (617) 726-2865
Registry dates
- Enumerated
- 2013-05-29
- Last updated
- 2026-04-10
- Certified
- 2026-04-10
Frequently asked questions
- What is William Freed-Pastor's NPI number?
- William Freed-Pastor's National Provider Identifier (NPI) is 1982041117, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Freed-Pastor's specialty?
- William Freed-Pastor is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Freed-Pastor located?
- William Freed-Pastor's practice location on file with NPPES is 450 Brookline Ave, Boston, MA 02215-5450.
- What is William Freed-Pastor's phone number?
- The practice phone number listed in the NPPES registry for William Freed-Pastor is (617) 632-4500.
- Does William Freed-Pastor accept Medicare?
- William Freed-Pastor is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Freed-Pastor's NPI active?
- Yes — William Freed-Pastor's NPI (1982041117) is active in the NPPES registry as of the last update on 2026-04-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.