Gregory F. Oxenkrug, M.D.
Psychiatry Physician · Newton, MA
Gregory F. Oxenkrug, M.D. is a psychiatry physician with a practice address in Newton, Massachusetts, and NPI 1891805073, issued on Aug 30, 2006. Check the license (Massachusetts 47504, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Gregory F. Oxenkrug
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 47504 MA
Self-reported in NPPES; status is on the state search - Practice location
- 100 Olde Field RD., Newton, MA 02459
- Phone
- (617) 775-1663
- Enumerated
- Aug 30, 2006
- Record last updated
- Dec 19, 2024
- Fax
- (617) 277-5322
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 2,736 in Massachusetts → Look up another NPI →
Verify Gregory F. Oxenkrug in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 47504Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
47% fewer Medicare Part D claims than the average psychiatry physician in 2024
528 Medicare Part D claims for 45 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D.
Most prescribed
- Clonazepam68 claims
- Lorazepam48 claims
- Duloxetine Hcl42 claims
- Mirtazapine36 claims
- Gabapentin27 claims
- Alprazolam24 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.
Gregory F. Oxenkrug among 2,736 psychiatry physician records in Massachusetts
Gregory F. Oxenkrug, M.D. is one of 2,736 psychiatry physician records with a practice address in Massachusetts. 65% 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, 51% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileNo · 45% of these records are
- Record last updated2024 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
52 psychiatry physician records list a practice address in Newton
They are 52 of the 2,975 NPPES records with a practice address in Newton, and 2,736 psychiatry physician records in Massachusetts.
All 2,736 in Massachusetts → Every provider in Newton → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Gregory Binus, M.D.Newton Centre, MA 024591629028931
- Lucinda Di Domenico, M.D.Newton Centre, MA 024591134175185
- Scott Ewing, D.O.Newton Center, MA 024591609800499
- Amit Granot, M.DNewton, MA 024591538186598
- Stephen Jaffe, M.D.Newton Center, MA 024591033158027
- Gillian Katz-Wies, M.D.Newton Center, MA 024591023078839
- Paul Laffer, M.D.Newton, MA 024591699757518
- William Land, M.D.Newton, MA 024591457390452
Common questions
What is Gregory F. Oxenkrug, M.D.'s NPI number?
Gregory F. Oxenkrug, M.D.'s National Provider Identifier (NPI) is 1891805073, issued on Aug 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory F. Oxenkrug, M.D. located?
The NPPES record lists a practice address at 100 Olde Field RD., Newton, MA, 02459. Phone: (617) 775-1663. Providers update this record themselves, so call before visiting.
How can I verify Gregory F. Oxenkrug, M.D.'s license?
NPPES lists Massachusetts license number 47504, 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 Gregory F. Oxenkrug, M.D. prescribe under Medicare Part D?
In 2024, Gregory F. Oxenkrug, M.D. had 528 Medicare Part D claims for 45 beneficiaries; the average among psychiatry physician prescribers was 1,000. 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.