DR. JEFFREY A BARNES M.D., PH.D
NPI 1326238411
Internal Medicine - Hematology & Oncology in Boston, MA
About Dr. Jeffrey A Barnes M.d., Ph.d NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JEFFREY A BARNES M.D., PH.D (NPI 1326238411) is an individual hematology & oncology provider in Boston, Massachusetts, licensed in Massachusetts (233635) and active in the NPI registry since July 2007. He is enrolled in Medicare PECOS, is affiliated with Cooley Dickinson Hospital Inc,the, and is a graduate of University Of Illinois College Of Med (chi/peor/rock/chm-urb) (2004).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Jeffrey A Barnes M.d., Ph.d is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
6Medicare enrollment records show Jeffrey Barnes reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,360 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,234 clinicians in this Medicare group
Newton, MA 02462
- Reassigned Medicare billing, Massachusetts enrollment
- 992 clinicians in this Medicare group
Oak Bluffs, MA 02557
- Reassigned Medicare billing, Massachusetts enrollment
- 251 clinicians in this Medicare group
Nantucket, MA 02554
- Reassigned Medicare billing, Massachusetts enrollment
- 206 clinicians in this Medicare group
Nantucket, MA 02554
- Reassigned Medicare billing, Massachusetts enrollment
- 172 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 7
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Cooley Dickinson Hospital Inc,the
Acute Care Hospitals · Northampton, MAMassachusetts General Hospital
Acute Care Hospitals · Boston, MANewton-Wellesley Hospital
Acute Care Hospitals · Newton, MABrigham And Women's Hospital
Acute Care Hospitals · Boston, MAMartha's Vineyard Hospital Inc
Critical Access Hospitals · Oak Bluffs, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02114 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BOSTON, MA 02114
BOSTON, MA 02114
BOSTON, MA 02114
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Jeffrey Barnes's NPI number?
The NPI number for Jeffrey Barnes is 1326238411. It was assigned to this individual provider in the NPPES registry on July 26, 2007.
Where is Jeffrey Barnes located?
Jeffrey Barnes practices at 55 Fruit St, Boston, MA 02114. The listed phone number is (617) 724-4000.
What is Jeffrey Barnes's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.
Is Jeffrey Barnes enrolled in Medicare?
Yes. Jeffrey Barnes is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Jeffrey Barnes's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Jeffrey Barnes reassigns Medicare benefits to 6 organizations: Massachusetts General Physicians Organization Inc (Boston, MA), The General Hospital Corporation (Boston, MA), Mass General Brigham Medical Group Suburban Massachusetts Inc (Newton, MA), Martha's Vineyard Hospital, Inc. (Oak Bluffs, MA), Nantucket Cottage Hospital (Nantucket, MA) and 1 more organization, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Jeffrey Barnes's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Jeffrey Barnes accept?
Health plans from Anthem Blue Cross and Blue Shield and Taro Health list Jeffrey Barnes as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Jeffrey Barnes affiliated with any hospitals?
According to CMS data, Jeffrey Barnes is affiliated with Cooley Dickinson Hospital Inc,the, Massachusetts General Hospital, Newton-Wellesley Hospital, Brigham And Women's Hospital and Martha's Vineyard Hospital Inc.
When was this NPI record last updated?
The NPPES record for Jeffrey Barnes was last updated on October 4, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Jeffrey A Barnes, M.D., PH.D · NPI 1326238411
Hematology & Oncology physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since July 26, 2007.
## Identity
- **NPI:** 1326238411 (Entity type: Individual)
- **Enumerated:** July 26, 2007
- **Primary specialty:** Internal Medicine - Hematology & Oncology · taxonomy 207RH0003X
- **State license:** 233635 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 55 FRUIT ST, Boston, MA 02114-2621
- **Phone:** (617) 724-4000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 6 organizations under Medicare reassignment (form CMS-855R): Massachusetts General Physicians Organization Inc (NPI 1801874573, Boston, MA); The General Hospital Corporation (NPI 1023049236, Boston, MA); Mass General Brigham Medical Group Suburban Massachusetts Inc (NPI 1538191218, Newton, MA); Martha's Vineyard Hospital, Inc. (NPI 1194866210, Oak Bluffs, MA); Nantucket Cottage Hospital (NPI 1447214622, Nantucket, MA); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Illinois College Of Med, class of 2004
## Record status
- **NPPES last updated:** October 4, 2007
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Source: [NPI Profile](https://npiprofile.com/npi/1326238411) · Data from the CMS NPPES public registry.