NPPES file of Aug 9, 2026

Oliver Gregory, M.D.

Internal Medicine Physician · Lynn, MA

Oliver Gregory, M.D. is an internal medicine physician with a practice address in Lynn, Massachusetts, and NPI 1154768281, issued on May 30, 2013. Check the license (Massachusetts 265504, 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
1154768281
Name
Oliver Gregory
Credential
M.D.
Primary taxonomy
Internal Medicine Physician 207R00000X
License numbers
265504 MA
LP02789 RI
Self-reported in NPPES; status is on the state search
Practice location
496 Lynnfield St, Lynn, MA 01904
Phone
(781) 593-3400
Enumerated
May 30, 2013
Record last updated
Jun 28, 2016 (not updated in 10 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20161007000743); accepts Medicare assignment
Medical or professional school
University Of Massachusetts Medical School, 2013
Telehealth
Offers telehealth (CMS)
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 internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →

Also registered at 496 Lynnfield St

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

  1. Laura Beeghly, MDInternal Medicine Physician1215988100
  2. Edward Braun, MDInternal Medicine Physician1003862798
  3. Paul Copeland, MDEndocrinology, Diabetes & Metabolism Physician1821044512
  4. Ernesto Dasilva, MDInternal Medicine Physician1487600268
  5. Harold Freedman, MDOrthopaedic Surgery Physician1649349523
  6. Alis Gabriel, MDPulmonary Disease Physician1356397137

Verify Oliver Gregory 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 265504    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

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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3.1 times the Medicare Part D claims of the average internal medicine physician in 2024

9,912 Medicare Part D claims for 506 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 362 claims were for opioids.

  1. Oliver Gregory9,912
  2. Specialty average3,176

Most prescribed

  1. Atorvastatin Calcium665 claims
  2. Amlodipine Besylate437 claims
  3. Lisinopril388 claims
  4. Gabapentin330 claims
  5. Metoprolol Succinate281 claims
  6. Omeprazole257 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: $23.57

1 payment: food and beverage; the largest payer was Lundbeck LLC. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Oliver Gregory$23.57
  2. Specialty average$1,303.06

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. Mass General Brigham Medical Group Northern Massachusetts IncDanvers, MA

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

Oliver Gregory among 6,825 internal medicine physician records in Massachusetts

Oliver Gregory, M.D. is one of 6,825 internal medicine physician records with a practice address in Massachusetts. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 70% of them.

  • NPI issued2013 · 70% of these records are older, 28% newer
  • In a Medicare fileYes · 75% of these records are
  • In the CMS Doctors and Clinicians fileYes · 60% of these records are
  • Graduated2013 · median 2004 among the 4,103 with a school on file
  • Record last updated2016 · 64% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

19 internal medicine physician records list a practice address in Lynn

They are 19 of the 2,030 NPPES records with a practice address in Lynn, and 6,825 internal medicine physician records in Massachusetts.

All 6,825 in Massachusetts → Every provider in Lynn → Internal Medicine Physician nationwide →

The 8 internal medicine physician records with the nearest ZIP codes

  1. Toryalai Amiri, M.D.Lynn, MA 019041255388047
  2. Laura Beeghly, MDLynn, MA 019041215988100
  3. Edward Braun, MDLynn, MA 019041003862798
  4. Ernesto Dasilva, MDLynn, MA 019041487600268
  5. Kurt Diebold, MDLynn, MA 019041114993516
  6. Carolyn Gonzalez, MDLynn, MA 019041598384364
  7. Ryan Gosselin, M.D., M.B.ALynn, MA 019041396972832
  8. James Gottschall, MDLynn, MA 019041932166196

Common questions

What is Oliver Gregory, M.D.'s NPI number?

Oliver Gregory, M.D.'s National Provider Identifier (NPI) is 1154768281, issued on May 30, 2013. An NPI identifies a provider in billing; it is not a license.

Where is Oliver Gregory, M.D. located?

The NPPES record lists a practice address at 496 Lynnfield St, Lynn, MA, 01904. Phone: (781) 593-3400. Providers update this record themselves, so call before visiting.

How can I verify Oliver Gregory, M.D.'s license?

NPPES lists Massachusetts license number 265504, 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 Oliver Gregory, M.D. prescribe under Medicare Part D?

In 2024, Oliver Gregory, M.D. had 9,912 Medicare Part D claims for 506 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.