Peter Glenn Joseph, MD
Emergency Medicine Physician · Castro Valley, CA
Peter Glenn Joseph, MD is an emergency medicine physician with a practice address in Castro Valley, California, and NPI 1396729158, issued on Dec 5, 2005. Check the license (California G35591, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Peter Glenn Joseph
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- G35591 CA
Self-reported in NPPES; status is on the state search - Practice location
- 20103 Lake Chabot RD, Castro Valley, CA 94546
- Phone
- (209) 342-2300
- Enumerated
- Dec 5, 2005
- Record last updated
- Jul 29, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (209) 524-4240
- Medicaid ID
- OOG355910 CA
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 20103 Lake Chabot RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alexei AdanEmergency Medicine Physician1679968978
- Maria Ait Rais, M.D.Hospitalist Physician1811239304
- Latricia Amadeo, RNRegistered Nurse1003407115
- Sandhya Ashokkumar, MDCritical Care Medicine (Internal Medicine) Physician1457913402
- Oluwaseyi Balasire, M.D.Hospitalist Physician1003235243
- Rachna Bali, DOHospitalist Physician1346541554
Verify Peter Glenn Joseph in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G35591Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average emergency medicine physician in 2024
13 Medicare Part D claims, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
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.
Peter Glenn Joseph among 7,751 emergency medicine physician records in California
Peter Glenn Joseph, MD is one of 7,751 emergency medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 96% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- 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 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
20 emergency medicine physician records list a practice address in Castro Valley
They are 20 of the 999 NPPES records with a practice address in Castro Valley, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Castro Valley → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Alexei AdanCastro Valley, CA 945461679968978
- Winnie Chan, MDCastro Valley, CA 945461538521281
- Merrill Chandler, MDCastro Valley, CA 945461508847237
- Nathalie Coeller, MDCastro Valley, CA 945461265607402
- Ralph Damato, MDCastro Valley, CA 945461225014673
- Rochelle Eggleston Philapil, MDCastro Valley, CA 945461265423610
- Alan Gottlieb, MDCastro Valley, CA 945461306837521
- Tatiana Mamantov, MDCastro Valley, CA 945461629069059
Common questions
What is Peter Glenn Joseph, MD's NPI number?
Peter Glenn Joseph, MD's National Provider Identifier (NPI) is 1396729158, issued on Dec 5, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Peter Glenn Joseph, MD located?
The NPPES record lists a practice address at 20103 Lake Chabot RD, Castro Valley, CA, 94546. Phone: (209) 342-2300. Providers update this record themselves, so call before visiting.
How can I verify Peter Glenn Joseph, MD's license?
NPPES lists California license number G35591, 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 Peter Glenn Joseph, MD prescribe under Medicare Part D?
In 2024, Peter Glenn Joseph, MD had 13 Medicare Part D claims; the average among emergency medicine physician prescribers was 226. 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.