Quick answers
- Where does Allison F. O'Neill see patients?
- Medicare's clinician data lists 2 practice locations, including Boston, MA. Call before your visit to confirm the address.
- What is Allison F. O'Neill's specialty?
- Medicare lists Hematology/Oncology as the primary specialty, and also Pediatric Medicine.
- Does Allison F. O'Neill accept Medicare assignment?
- Yes. Medicare's clinician data says Allison F. O'Neill accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Allison F. O'Neill?
- (617) 355-6000, as listed in official Medicare / NPI Registry data.
- What is Allison F. O'Neill's NPI number?
- 1043479165. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Allison F. O'Neill is enrolled with Medicare (CMS data updated 2026-10-02).
- 300 Longwood AveBoston, MA 02115 (617) 355‑6000
- 450 Brookline AveBoston, MA 02215 (617) 632‑3586
Group practices
Medicare enrollment lists Allison F. O'Neill as a member of these groups (CMS data updated 2026-10-02).
- Dana-Farber Cancer Institute, Inc.684 clinicians in the group
- Children's Hospital Pediatric Associates, Inc328 clinicians in the group
Specialties
- Hematology/Oncologyprimary
- Pediatric Medicinealso
Other hematologist-oncologists in Boston
Clinicians with the same Medicare primary specialty in Boston, MA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Albert Einstein College Of Medicine Of Yeshiva University |
| Graduation year | 2005 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1043479165 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians