Gregory V. Defazio, MD
Obstetrics & Gynecology Physician · Brooklyn, NY
Gregory V. Defazio, MD is an obstetrics & gynecology physician with a practice address in Brooklyn, New York, and NPI 1164495628, issued on Feb 7, 2006. Check the license (New York 198761, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Gregory V. Defazio
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 198761 NY
Self-reported in NPPES; status is on the state search - Practice location
- 1301 82ND Street, Brooklyn, NY 11228
- Phone
- (718) 836-3721
- Enumerated
- Feb 7, 2006
- Record last updated
- Jul 13, 2026
- Fax
- (718) 259-6567
- Medicaid ID
- 01606046 NY
- Medicare enrollment
- Enrolled (PECOS I20040621001869); accepts Medicare assignment
- Medical or professional school
- State University Of New York Downstate Medical Center, 1991
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 3,174 in New York → Look up another NPI →
Verify Gregory V. Defazio in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 198761Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
29% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
117 Medicare Part D claims for 34 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
Most prescribed
- Fluconazole44 claims
- Nitrofurantoin Mono-Macro11 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 90.4 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- DE Fazio Obstetrics And Gynecology PCBrooklyn, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory V. Defazio among 3,174 obstetrics & gynecology physician records in New York
Gregory V. Defazio, MD is one of 3,174 obstetrics & gynecology physician records with a practice address in New York. 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 9% of them.
- NPI issued2006 · 9% of these records are older, 49% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated1991 · median 2002 among the 1,870 with a school on file
- Record last updated2026 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in New York
There are 3,174 obstetrics & gynecology physician records in New York.
All 3,174 in New York → Every provider in Brooklyn → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Bassam Aldaia, MDBrooklyn, NY 112281407854565
- Mark Defazio, MDBrooklyn, NY 112281073586343
- Kamila Agayeva, M.DBrooklyn, NY 112291457364804
- Hayama Brill, M.D.Brooklyn, NY 112291831397082
- Annie Fils-Aime, MDBrooklyn, NY 112291306832878
- Rubin Frenkel, M.D.Brooklyn, NY 112291184673733
- Joseph Iwanicki, M.D.Brooklyn, NY 112291225105513
- Madeline Lang, MDBrooklyn, NY 112291447871645
Common questions
What is Gregory V. Defazio, MD's NPI number?
Gregory V. Defazio, MD's National Provider Identifier (NPI) is 1164495628, issued on Feb 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory V. Defazio, MD located?
The NPPES record lists a practice address at 1301 82ND Street, Brooklyn, NY, 11228. Phone: (718) 836-3721. Providers update this record themselves, so call before visiting.
How can I verify Gregory V. Defazio, MD's license?
NPPES lists New York license number 198761, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gregory V. Defazio, MD prescribe under Medicare Part D?
In 2024, Gregory V. Defazio, MD had 117 Medicare Part D claims for 34 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
What is Gregory V. Defazio, MD's MIPS final score?
The 2023 MIPS final score is 90.4 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.