Allison O'Neill
NPI 1043479165 · Pediatric Hematology & Oncology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Allison O'Neill is a Pediatric Hematology & Oncology Physician provider in Boston, MA (NPI 1043479165).
Provider details
- NPI number
- 1043479165
- Entity type
- Individual
- Primary specialty
- Pediatric Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- No
- License
- 235586 (MA)
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
18 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
- 2008-06-04
- Last updated
- 2015-06-29
Frequently asked questions
- What is Allison O'Neill's NPI number?
- Allison O'Neill's National Provider Identifier (NPI) is 1043479165, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Allison O'Neill's specialty?
- Allison O'Neill is listed in the NPPES registry with a primary specialty of Pediatric Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Allison O'Neill located?
- Allison O'Neill's practice location on file with NPPES is 300 Longwood Ave, Boston, MA 02115-5724.
- What is Allison O'Neill's phone number?
- The practice phone number listed in the NPPES registry for Allison O'Neill is (617) 355-6000.
- Does Allison O'Neill accept Medicare?
- Allison O'Neill is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Allison O'Neill's NPI active?
- Yes — Allison O'Neill's NPI (1043479165) is active in the NPPES registry as of the last update on 2015-06-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.