Jay A. Kaiser, M.D.
Diagnostic Radiology Physician · Greenbrae, CA
Jay A. Kaiser, M.D. is a diagnostic radiology physician with a practice address in Greenbrae, California, and NPI 1275519001, issued on Dec 22, 2005. Check the license (California G25290, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jay A. Kaiser
- Credential
- M.D.
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License numbers
- G25290 CA
3882 AK
33865 AZ
30660 CO
13079 HI
and 10 more
Self-reported in NPPES; status is on the state search - Practice location
- 1260 S Eliseo Dr, Greenbrae, CA 94904
- Phone
- (415) 461-9033
- Enumerated
- Dec 22, 2005
- Record last updated
- May 15, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (415) 883-8082
- Medicaid IDs
- 200094370A OK
8169666 WA
867632 AZ
00G252900 CA - Medicare enrollment
- Enrolled (PECOS I20040309001089); accepts Medicare assignment
- Medical or professional school
- Washington University School Of Medicine, 1972
- Entity
- Type 1 · individual
8 nearest diagnostic radiology physician records → All 4,500 in California → Look up another NPI →
Also registered at 1260 S Eliseo Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mary Davis, CNMAdvanced Practice Midwife1588815534
- Brian Demuth, MDObstetrics & Gynecology Physician1770553950
- Sylvia Flores, M.D.Obstetrics & Gynecology Physician1114904307
- David Galland, M.D.Obstetrics & Gynecology Physician1154392637
- Cortney Harper, M.D.Obstetrics & Gynecology Physician1053587667
- Betsy Holland, M.D.Diagnostic Radiology Physician1659357481
Verify Jay A. Kaiser in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G25290Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through 5 group practices
- California Advanced Imaging Medical Associates IncSan Anselmo, CA
- Monterey Spine And Joint PCMonterey, CA
- New Century Imaging LLCSan Anselmo, CA
- Prima Medical FoundationGreenbrae, CA
- Proliance Surgeons Inc P STacoma, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jay A. Kaiser among 4,500 diagnostic radiology physician records in California
Jay A. Kaiser, M.D. is one of 4,500 diagnostic radiology 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 93% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated1972 · median 2004 among the 3,130 with a school on file
- Record last updated2020 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
13 diagnostic radiology physician records list a practice address in Greenbrae
They are 13 of the 727 NPPES records with a practice address in Greenbrae, and 4,500 diagnostic radiology physician records in California.
All 4,500 in California → Every provider in Greenbrae → Diagnostic Radiology Physician nationwide →
The 8 diagnostic radiology physician records with the nearest ZIP codes
- William Demartini, M.D.Greenbrae, CA 949041427091016
- Russell Fritz, M.D.Greenbrae, CA 949041679550032
- Chad Goodman, M.D.Greenbrae, CA 949041386686525
- Susan Gootnick, M.D.Kentfield, CA 949041386714905
- Donna Hoghooghi, M.D.Greenbrae, CA 949041295781201
- Betsy Holland, M.D.Greenbrae, CA 949041659357481
- Ralph Koenker, M.D.Greenbrae, CA 949041891734265
- Philip Kurzman, M.D.Greenbrae, CA 949041346424991
Common questions
What is Jay A. Kaiser, M.D.'s NPI number?
Jay A. Kaiser, M.D.'s National Provider Identifier (NPI) is 1275519001, issued on Dec 22, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Jay A. Kaiser, M.D. located?
The NPPES record lists a practice address at 1260 S Eliseo Dr, Greenbrae, CA, 94904. Phone: (415) 461-9033. Providers update this record themselves, so call before visiting.
How can I verify Jay A. Kaiser, M.D.'s license?
NPPES lists California license number G25290, 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.