Stephen Vincent Dimarzo, M.D.
Obstetrics & Gynecology Physician · San Diego, CA
Stephen Vincent Dimarzo, M.D. is an obstetrics & gynecology physician with a practice address in San Diego, California, and NPI 1366479461, issued on Jun 26, 2006. Check the license (California G45838, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Stephen Vincent Dimarzo
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- G45838 CA
Self-reported in NPPES; status is on the state search - Practice location
- 9333 Genesee Ave, San Diego, CA 92121
- Phone
- (858) 882-8350
- Enumerated
- Jun 26, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20060914000606); accepts Medicare assignment
- Medical or professional school
- University Of Rochester School Of Medicine And Dentistry, 1980
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 9333 Genesee Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rachael Accardi, LMFTMarriage & Family Therapist1528572450
- Vera Ann Barile, M.D.Obstetrics & Gynecology Physician1275630204
- Jonathan Chan, D.O.Family Medicine Physician1104016294
- Alec Contag, MDFamily Medicine Physician1215495627
- Jessica Daly, MDStudent in an Organized Health Care Education/Training Program1124963681
- Shahram Daneshmand, M.D.Maternal & Fetal Medicine Physician1891867412
Verify Stephen Vincent Dimarzo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G45838Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
65% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
57 Medicare Part D claims for 23 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 25% of claims.
Most prescribed
- Estradiol14 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: $264.86
8 payments; by number, the most common kind was food and beverage; the largest payer was Astellas Pharma US Inc. The 21,429 providers of this specialty with any payment received $1,030.61 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
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
- Scripps HealthLa Jolla, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stephen Vincent Dimarzo among 5,088 obstetrics & gynecology physician records in California
Stephen Vincent Dimarzo, M.D. is one of 5,088 obstetrics & gynecology physician records with a practice address in California. 74% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 52% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated1980 · median 2004 among the 2,700 with a school on file
- Record last updated2007 · 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 207V00000X and a California 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 California
There are 5,088 obstetrics & gynecology physician records in California.
All 5,088 in California → Every provider in San Diego → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Vera Ann Barile, M.D.San Diego, CA 921211275630204
- Kim Bui, MDSan Diego, CA 921211235244252
- Peter Dietze, MDSan Diego, CA 921211336259290
- Valerie Gafori, M.D.San Diego, CA 921211003853029
- Nancy Grauer, M.D.San Diego, CA 921211740216167
- Laurie Greenberg, MDSan Diego, CA 921211265470595
- Heather Gunnarson, MDSan Diego, CA 921211578587739
- Jack Hsiao, MDSan Diego, CA 921211477633287
Common questions
What is Stephen Vincent Dimarzo, M.D.'s NPI number?
Stephen Vincent Dimarzo, M.D.'s National Provider Identifier (NPI) is 1366479461, issued on Jun 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Stephen Vincent Dimarzo, M.D. located?
The NPPES record lists a practice address at 9333 Genesee Ave, San Diego, CA, 92121. Phone: (858) 882-8350. Providers update this record themselves, so call before visiting.
How can I verify Stephen Vincent Dimarzo, M.D.'s license?
NPPES lists California license number G45838, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Stephen Vincent Dimarzo, M.D. prescribe under Medicare Part D?
In 2024, Stephen Vincent Dimarzo, M.D. had 57 Medicare Part D claims for 23 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. 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.