Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

Hematology/Oncology

James Rooney, MD

Works at hospitals in Worcester, MA · Massachusetts

Summary

James Rooney, MD (Hematology/Oncology) is listed by Medicare at 1 hospital in Worcester, MA. NPI 1215983358. Medicare data says the clinician accepts Medicare assignment. Source: CMS Facility Affiliation Data, updated 2026-10-02.

From official Medicare data

This page shows what Medicare's official clinician data says about James Rooney, joined by NPI number (data updated 2026-10-02). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

At a glance

Hematology/OncologyPrimary specialty
YesAccepts Medicare assignment
52Years since medical school (graduated 1974)
New York Medical CollegeMedical school
MaleGender (as listed)
Reliant Medical Group IncGroup practice

Quick answers

Which hospitals does James Rooney work at?
Medicare's official clinician data lists James Rooney at 1 hospital: St Vincent Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
Where does James Rooney see patients?
Medicare's clinician data lists 1 practice location in Worcesteer, MA. Call before your visit to confirm the address.
What is James Rooney's specialty?
Medicare lists Hematology/Oncology as the primary specialty.
Does James Rooney accept Medicare assignment?
Yes. Medicare's clinician data says James Rooney 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 James Rooney?
(508) 595-2300, as listed in official Medicare / NPI Registry data.
What is James Rooney's NPI number?
1215983358. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where James Rooney works

Medicare's Facility Affiliation Data lists James Rooney at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.

Practice locations

Addresses where James Rooney is enrolled with Medicare (CMS data updated 2026-10-02).

Group practices

Medicare enrollment lists James Rooney as a member of this group (CMS data updated 2026-10-02).

  • Reliant Medical Group Inc640 clinicians in the group

Specialties

Find other Hematology/Oncology doctors in Massachusetts →

Other hematologist-oncologists in Massachusetts

Clinicians with the same Medicare primary specialty in Massachusetts — not a recommendation.

All hematologist-oncologists in Massachusetts →

Clinician information

CredentialMD
Medical schoolNew York Medical College
Graduation year1974
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1215983358
CorrectionsReport 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

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
  2. National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
  3. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  4. Medicare Care Compare — official Medicare tool to look up clinicians