Edward Martin Blumenstock, MD
Obstetrics & Gynecology Physician · Oakland, CA
Edward Martin Blumenstock, MD is an obstetrics & gynecology physician with a practice address in Oakland, California, and NPI 1235156738, issued on Jul 17, 2006. Check the license (California G22905, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Edward Martin Blumenstock
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- G22905 CA
Self-reported in NPPES; status is on the state search - Practice location
- 365 Hawthorne Ave, Oakland, CA 94609
- Phone
- (510) 893-1700
- Enumerated
- Jul 17, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (510) 893-0110
- Medicaid ID
- 00G229050 CA
- Medicare enrollment
- Enrolled (PECOS I20080521000303); accepts Medicare assignment
- Medical or professional school
- University Of California, San Francisco School Of Medicine, 1971
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 365 Hawthorne Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- David Anderson, MDCardiovascular Disease Physician1780613380
- Miranda Bassilios, PA CPhysician Assistant1609831114
- Gregory Broderick-Villa, MDSurgery Physician1376571562
- John Chiu, MDInterventional Cardiology Physician1629007000
- Stephen Etheredge, MDVascular Surgery Physician1770694101
- Robert Feldman, MDInterventional Cardiology Physician1740219062
Verify Edward Martin Blumenstock in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G22905Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $159.87
1 payment: food and beverage; the largest payer was Conmed Corporation. 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
- University Healthcare AlliancePleasanton, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Edward Martin Blumenstock among 5,088 obstetrics & gynecology physician records in California
Edward Martin Blumenstock, MD 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
- Graduated1971 · 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 Oakland → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Lisa Bernard-Pearl, MDOakland, CA 946091750328373
- Vanessa Chan, M.D.Oakland, CA 946091114960747
- Michellee Chen, M.D.Oakland, CA 946091528141306
- Yvette Gentry, M.D.Oakland, CA 946091467498634
- Magdy Girgis, MDOakland, CA 946091710942677
- Goldee Gross, MDOakland, CA 946091235194176
- Thomas Hambrick, MDOakland, CA 946091215992151
- William Isenberg, MDOakland, CA 946091265497101
Common questions
What is Edward Martin Blumenstock, MD's NPI number?
Edward Martin Blumenstock, MD's National Provider Identifier (NPI) is 1235156738, issued on Jul 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Edward Martin Blumenstock, MD located?
The NPPES record lists a practice address at 365 Hawthorne Ave, Oakland, CA, 94609. Phone: (510) 893-1700. Providers update this record themselves, so call before visiting.
How can I verify Edward Martin Blumenstock, MD's license?
NPPES lists California license number G22905, 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.
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.