NPPES file of Aug 9, 2026

James Matthew Koomey, M.D.

Medical Oncology Physician · Plymouth, MA

James Matthew Koomey, M.D. is a medical oncology physician with a practice address in Plymouth, Massachusetts, and NPI 1477531358, issued on Jan 3, 2006. Check the license (Massachusetts 155230, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1477531358
Name
James Matthew Koomey
Credential
M.D.
Primary taxonomy
Medical Oncology Physician 207RX0202X
License number
155230 MA
Self-reported in NPPES; status is on the state search
Practice location
275 Sandwich St, Plymouth, MA 02360
Phone
(508) 830-2390
Enumerated
Jan 3, 2006
Record last updated
Nov 28, 2007 (not updated in 19 years: call before relying on the address or phone)
Fax
(508) 830-2399
Medicaid ID
3178391 MA
Medicare enrollment
Enrolled (PECOS I20111214000430); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest medical oncology physician records → All 421 in Massachusetts → Look up another NPI →

Also registered at 275 Sandwich St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Charbel Abou Rjeily, MDInternal Medicine Physician1710175583
  2. Caroline Alpert, M.D.Internal Medicine Physician1831177260
  3. Ahmad AmmousHospitalist Physician1083119549
  4. Andis BalaNurse Practitioner1770154494
  5. Ronald Bardawil, M.D.Anatomic Pathology & Clinical Pathology Physician1336118595
  6. Randy BarnhardCertified Registered Nurse Anesthetist1811373855

Verify James Matthew Koomey in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
    Search for license 155230    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Massachusetts license search

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2.2 times the Medicare Part D claims of the average medical oncology physician in 2024

1,572 Medicare Part D claims for 225 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D. 110 claims were for opioids.

  1. James Koomey1,572
  2. Specialty average703

Most prescribed

  1. Letrozole113 claims
  2. Xtandi80 claims
  3. Hydroxyurea78 claims
  4. Eliquis72 claims
  5. Prednisone66 claims
  6. Gabapentin60 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.

Industry payments in 2024: $17.02

1 payment: education; the largest payer was Regeneron Healthcare Solutions, Inc. The 3,343 providers of this specialty with any payment received $11,773.47 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. James Koomey$17
  2. Specialty average$11,773

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Jordan Physician Associates IncPlymouth, MA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

James Matthew Koomey among 421 medical oncology physician records in Massachusetts

James Matthew Koomey, M.D. is one of 421 medical oncology physician records with a practice address in Massachusetts. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 10% of them.

  • NPI issued2006 · 10% of these records are older, 60% newer
  • In a Medicare fileYes · 76% of these records are
  • In the CMS Doctors and Clinicians fileYes · 69% of these records are
  • Graduated1995 · median 2007 among the 291 with a school on file
  • Record last updated2007 · 51% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RX0202X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Medical Oncology Physician providers in Massachusetts

There are 421 medical oncology physician records in Massachusetts.

All 421 in Massachusetts → Every provider in Plymouth → Medical Oncology Physician nationwide →

The 8 medical oncology physician records with the nearest ZIP codes

  1. Sualp Tansan, M.D.Plymouth, MA 023601194830877
  2. Richard Samaha, M.D.Brockton, MA 023021720121205
  3. Dan Longo, M.D.Brookline, MA 024451790842664
  4. Elgene Lim, M.D.Boston, MA 024461073817524
  5. Melody Craft, M.D.Waltham, MA 024511124218268
  6. James O'Leary, M.D.Waltham, MA 024511336371012
  7. Mark Huberman, MDNewton, MA 024591477583441
  8. Caroline Block, MDNewton, MA 024621851368633

Common questions

What is James Matthew Koomey, M.D.'s NPI number?

James Matthew Koomey, M.D.'s National Provider Identifier (NPI) is 1477531358, issued on Jan 3, 2006. An NPI identifies a provider in billing; it is not a license.

Where is James Matthew Koomey, M.D. located?

The NPPES record lists a practice address at 275 Sandwich St, Plymouth, MA, 02360. Phone: (508) 830-2390. Providers update this record themselves, so call before visiting.

How can I verify James Matthew Koomey, M.D.'s license?

NPPES lists Massachusetts license number 155230, 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 James Matthew Koomey, M.D. prescribe under Medicare Part D?

In 2024, James Matthew Koomey, M.D. had 1,572 Medicare Part D claims for 225 beneficiaries; the average among medical oncology physician prescribers was 703. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.