DR. JOHN JOSEPH MCGRATH III MD
NPI 1215913157
Radiology - Radiation Oncology in Concord, MA
About Dr. John Joseph Mcgrath Iii Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN JOSEPH MCGRATH III MD (NPI 1215913157) is an individual radiation oncology provider in Concord, Massachusetts, licensed in Massachusetts (157106) and active in the NPI registry since December 2005. He is enrolled in Medicare PECOS, is affiliated with Massachusetts General Hospital, and is a graduate of University Of Vermont College Of Medicine (1993).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. John Joseph Mcgrath Iii Md 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.
Areas of Expertise CMS Part B claims 16
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 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Massachusetts General Hospital
Acute Care Hospitals · Boston, MAMassachusetts Eye And Ear Infirmary -
Acute Care Hospitals · Boston, MAEmerson Hospital -
Acute Care Hospitals · W Concord, MALahey Hospital & Medical Center, Burlington
Acute Care Hospitals · Burlington, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 01742 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
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
CONCORD, MA 01742
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 John Mcgrath's NPI number?
The NPI number for John Mcgrath is 1215913157. It was assigned to this individual provider in the NPPES registry on December 22, 2005.
Where is John Mcgrath located?
John Mcgrath practices at Old Road To Nine Acre Corner Emerson Hospital Radiation Medicine, Concord, MA 01742. The listed phone number is (978) 287-3290.
What is John Mcgrath's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Radiation Oncology, with taxonomy code 2085R0001X.
Is John Mcgrath enrolled in Medicare?
Yes. John Mcgrath 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.
What insurance does John Mcgrath accept?
Health plans from Anthem Blue Cross and Blue Shield list John Mcgrath 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 John Mcgrath affiliated with any hospitals?
According to CMS data, John Mcgrath is affiliated with Massachusetts General Hospital, Massachusetts Eye And Ear Infirmary -, Emerson Hospital - and Lahey Hospital & Medical Center, Burlington.
When was this NPI record last updated?
The NPPES record for John Mcgrath was last updated on July 13, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.
