DR. JAY A KAISER M.D.
NPI 1275519001
Radiology - Diagnostic Radiology in Greenbrae, CA
About Dr. Jay A Kaiser M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JAY A KAISER M.D. (NPI 1275519001) is an individual diagnostic radiology provider in Greenbrae, California, licensed in California (G25290) and active in the NPI registry since December 2005. He is enrolled in Medicare PECOS, is affiliated with Oklahoma Surgical Hospital, Llc, and maintains 3 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 3
Other Identifiers 11
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Jay A Kaiser M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
9Medicare enrollment records show Jay Kaiser reassigns Medicare billing to 9 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Novato, CA 94949
- Reassigned Medicare billing, California and Hawaii enrollments
- 111 clinicians in this Medicare group
San Francisco, CA 94115
- Reassigned Medicare billing, Hawaii enrollment
- 8 clinicians in this Medicare group
San Francisco, CA 94109
- Reassigned Medicare billing, California and Hawaii enrollments
- 96 clinicians in this Medicare group
Salinas, CA 93901
- Reassigned Medicare billing, California and Hawaii enrollments
- 10 clinicians in this Medicare group
Monterey, CA 93940
- Reassigned Medicare billing, California enrollment
- 68 clinicians in this Medicare group
Monterey, CA 93940
- Reassigned Medicare billing, California enrollment
- 132 clinicians in this Medicare group
Kennewick, WA 99336
- Reassigned Medicare billing, Washington enrollment
- 589 clinicians in this Medicare group
Tulsa, OK 74137
- Reassigned Medicare billing, California enrollment
- 10 clinicians in this Medicare group
Oradell, NJ 07649
- Reassigned Medicare billing, California, Hawaii and New Jersey enrollments
- 10 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 6
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Oklahoma Surgical Hospital, LLC
Acute Care Hospitals · Tulsa, OKPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94904 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 14
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
GREENBRAE, CA 94904
GREENBRAE, CA 94904
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Jay Kaiser's NPI number?
The NPI number for Jay Kaiser is 1275519001. It was assigned to this individual provider in the NPPES registry on December 22, 2005.
Where is Jay Kaiser located?
Jay Kaiser practices at 1260 S Eliseo Dr Suite 100, Greenbrae, CA 94904. The listed phone number is (415) 461-9033.
What is Jay Kaiser's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.
Is Jay Kaiser enrolled in Medicare?
Yes. Jay Kaiser is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Jay Kaiser's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Jay Kaiser reassigns Medicare benefits to 9 organizations: Prima Medical Foundation (Novato, CA), California Pacific Advanced Imaging (San Francisco, CA), California Advanced Imaging Medical Associates Inc (San Francisco, CA), Salinas Valley Advanced Imaging Center Corporation (Salinas, CA), Montage Surgical Group (Monterey, CA) and 4 more organizations, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Jay Kaiser's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Jay Kaiser accept?
Health plans from Premera Blue Cross Blue Shield of Alaska list Jay Kaiser as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Jay Kaiser affiliated with any hospitals?
According to CMS data, Jay Kaiser is affiliated with Oklahoma Surgical Hospital, LLC.
When was this NPI record last updated?
The NPPES record for Jay Kaiser was last updated on May 15, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Jay A Kaiser, M.D. · NPI 1275519001
Diagnostic Radiology physician in Greenbrae, California. Individual provider, active in the CMS NPPES registry since December 22, 2005.
## Identity
- **NPI:** 1275519001 (Entity type: Individual)
- **Enumerated:** December 22, 2005
- **Primary specialty:** Radiology - Diagnostic Radiology · taxonomy 2085R0202X
- **State license:** G25290 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1260 S ELISEO DR, SUITE 100, Greenbrae, CA 94904-2009
- **Phone:** (415) 461-9033 · **Fax:** (415) 883-8082
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 9 organizations under Medicare reassignment (form CMS-855R): Prima Medical Foundation (NPI 1811217946, Novato, CA); California Pacific Advanced Imaging (NPI 1912950676, San Francisco, CA); California Advanced Imaging Medical Associates Inc (NPI 1881646909, San Francisco, CA); Salinas Valley Advanced Imaging Center Corporation (NPI 1700622586, Salinas, CA); Montage Surgical Group (NPI 1629864236, Monterey, CA); and 4 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Washington University School Of Medicine, class of 1972
## Record status
- **NPPES last updated:** May 15, 2020
- **Other identifiers:** Medicaid 00G252900 (CA); Medicaid 867632 (AZ); Medicaid 200094370A (OK); and 8 more
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Source: [NPI Profile](https://npiprofile.com/npi/1275519001) · Data from the CMS NPPES public registry.