John Joseph McGrath, MD
Radiation Oncology Physician · Concord, MA
John Joseph McGrath, MD is a radiation oncology physician with a practice address in Concord, Massachusetts, and NPI 1215913157, issued on Dec 22, 2005. Check the license (Massachusetts 157106, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- John Joseph McGrath
- Credential
- MD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- 157106 MA
Self-reported in NPPES; status is on the state search - Practice location
- Old Road TO Nine Acre Corner, Concord, MA 01742
- Phone
- (978) 287-3290
- Enumerated
- Dec 22, 2005
- Record last updated
- Jul 13, 2026
- Fax
- (978) 287-3295
- Medicaid ID
- 3179508 MA
- Medicare enrollment
- Enrolled (PECOS I20040727001157); accepts Medicare assignment
- Medical or professional school
- University Of Vermont College Of Medicine, 1993
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 241 in Massachusetts → Look up another NPI →
Also registered at Old Road TO Nine Acre Corner
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Gunvor Lowe, CRNANurse Practitioner1538182886
Verify John Joseph McGrath in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 157106Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
38% fewer Medicare Part D claims than the average radiation oncology physician in 2024
83 Medicare Part D claims for 33 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 13 claims were for opioids.
Most prescribed
- Tamsulosin Hcl33 claims
- Lidocaine Hcl Viscous11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Massachusetts General Physicians Organization IncDanvers, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Joseph McGrath among 241 radiation oncology physician records in Massachusetts
John Joseph McGrath, MD is one of 241 radiation oncology physician records with a practice address in Massachusetts. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 86% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated1993 · median 2006 among the 172 with a school on file
- Record last updated2026 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in Massachusetts
There are 241 radiation oncology physician records in Massachusetts.
All 241 in Massachusetts → Every provider in Concord → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Yirong Liu, MDMarlborough, MA 017521881263937
- Allison Sacher, M.D.Marlborough, MA 017521679510879
- Fan Zhu, M.D.Marlborough, MA 017521083146294
- Stephanie Macausland, M.DMilford, MA 017571740245505
- Ron Shiloh, MDMilford, MA 017571649388729
- Teresa Van Buren, M.D.Framingham, MA 017011699709451
- James Cassady, MDBurlington, MA 018051871659227
- Howard Hsu, M.D.Burlington, MA 018051952513392
Common questions
What is John Joseph McGrath, MD's NPI number?
John Joseph McGrath, MD's National Provider Identifier (NPI) is 1215913157, issued on Dec 22, 2005. An NPI identifies a provider in billing; it is not a license.
Where is John Joseph McGrath, MD located?
The NPPES record lists a practice address at Old Road TO Nine Acre Corner, Concord, MA, 01742. Phone: (978) 287-3290. Providers update this record themselves, so call before visiting.
How can I verify John Joseph McGrath, MD's license?
NPPES lists Massachusetts license number 157106, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Joseph McGrath, MD prescribe under Medicare Part D?
In 2024, John Joseph McGrath, MD had 83 Medicare Part D claims for 33 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.