John Anthony Gregg, D.O.
Family Medicine Physician · Wayne, NJ
John Anthony Gregg, D.O. is a family medicine physician with a practice address in Wayne, New Jersey, and NPI 1013118660, issued on May 30, 2007. Check the license (New Jersey 25MB08249300, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- John Anthony Gregg
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 25MB08249300 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 510 Hamburg Tpke, Wayne, NJ 07470
- Phone
- (973) 942-6005
- Enumerated
- May 30, 2007
- Record last updated
- May 27, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (973) 942-6009
- Medicaid ID
- 0152757 NJ
- Medicare enrollment
- Enrolled (PECOS I20070906000363); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,770 in New Jersey → Look up another NPI →
Also registered at 510 Hamburg Tpke
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Victor Abdy, M.DInternal Medicine Physician1164446795
- Caroline Amato, A-GNP-CPrimary Care Nurse Practitioner1659076552
- Anthony Barravecchio, D.O.Internal Medicine Physician1114996477
- Blair Beltzer, M.D.Family Medicine Physician1073635421
- Jeanette Biller, D.O.Family Medicine Physician1578505178
- Ivan Darenkov, M.D.Pediatric Gastroenterology Physician1710172853
Verify John Anthony Gregg in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Jersey State Board of Medical Examiners
Search for license 25MB08249300Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% fewer Medicare Part D claims than the average family medicine physician in 2024
533 Medicare Part D claims for 409 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Prednisone73 claims
- Amoxicillin-Clavulanate Potass41 claims
- Cephalexin41 claims
- Albuterol Sulfate Hfa31 claims
- Azithromycin31 claims
- Fluticasone Propionate29 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 2 group practices
- Jersey Irish MedicalHamilton Township, NJ
- Summit Medical Group PABerkeley Heights, NJ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Anthony Gregg among 2,770 family medicine physician records in New Jersey
John Anthony Gregg, D.O. is one of 2,770 family medicine physician records with a practice address in New Jersey. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 45% of them.
- NPI issued2007 · 45% of these records are older, 46% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2003 · median 2006 among the 1,875 with a school on file
- Record last updated2008 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
21 family medicine physician records list a practice address in Wayne
They are 21 of the 1,402 NPPES records with a practice address in Wayne, and 2,770 family medicine physician records in New Jersey.
All 2,770 in New Jersey → Every provider in Wayne → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Tunizia Ahmed-Flowers, M.D.Wayne, NJ 074701326219023
- Francis Bain, MDWayne, NJ 074701174537898
- Blair Beltzer, M.D.Wayne, NJ 074701073635421
- Jeanette Biller, D.O.Wayne, NJ 074701578505178
- Jessica Chow, D.O.Wayne, NJ 074701992950232
- Joseph Duffy, M.D.Wayne, NJ 074701033117171
- James Lampariello, MDWayne, NJ 074701891717294
- Helder Rebelo, PAWayne, NJ 074701952479842
Common questions
What is John Anthony Gregg, D.O.'s NPI number?
John Anthony Gregg, D.O.'s National Provider Identifier (NPI) is 1013118660, issued on May 30, 2007. An NPI identifies a provider in billing; it is not a license.
Where is John Anthony Gregg, D.O. located?
The NPPES record lists a practice address at 510 Hamburg Tpke, Wayne, NJ, 07470. Phone: (973) 942-6005. Providers update this record themselves, so call before visiting.
How can I verify John Anthony Gregg, D.O.'s license?
NPPES lists New Jersey license number 25MB08249300, as entered by the provider. Search the New Jersey State Board of Medical Examiners at https://newjersey.mylicense.com/verification/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Anthony Gregg, D.O. prescribe under Medicare Part D?
In 2024, John Anthony Gregg, D.O. had 533 Medicare Part D claims for 409 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.