Loren Walensky, MD PHD
NPI 1508896853 · Pediatric Hematology & Oncology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Loren Walensky, MD PHD is a Pediatric Hematology & Oncology Physician provider in Boston, MA (NPI 1508896853).
Provider details
- NPI number
- 1508896853
- Entity type
- Individual
- Primary specialty
- Pediatric Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD PHD
- Sex
- Male
- Sole proprietor
- No
- License
- 204839 (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
19 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)
- 450 Brookline AveBoston, MA 02215-5450Phone: (617) 632-3274
Registry dates
- Enumerated
- 2006-07-03
- Last updated
- 2026-05-18
- Certified
- 2026-05-18
Frequently asked questions
- What is Loren Walensky's NPI number?
- Loren Walensky's National Provider Identifier (NPI) is 1508896853, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Loren Walensky's specialty?
- Loren Walensky is listed in the NPPES registry with a primary specialty of Pediatric Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Loren Walensky located?
- Loren Walensky's practice location on file with NPPES is 300 Longwood Ave, Boston, MA 02115-5724.
- What is Loren Walensky's phone number?
- The practice phone number listed in the NPPES registry for Loren Walensky is (617) 355-6000.
- Does Loren Walensky accept Medicare?
- Loren Walensky is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Loren Walensky's NPI active?
- Yes — Loren Walensky's NPI (1508896853) is active in the NPPES registry as of the last update on 2026-05-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.