Jay Kaiser, M.D.
NPI 1275519001 · Diagnostic Radiology Physician · Greenbrae, CA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jay Kaiser, M.D. is a Diagnostic Radiology Physician provider in Greenbrae, CA (NPI 1275519001).
Provider details
- NPI number
- 1275519001
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 33865 (AZ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
- Diagnostic Radiology Physician2085R0202X
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
502 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Mri Scan of Lower Spinal Canal Without Contrast72148 | 256 | $114 |
| Mri Scan of Lower Spinal Canal Without Contrast72148 | 105 | $77 |
| Mri Scan of Upper Spinal Canal Without Contrast72141 | 71 | $113 |
| Mri Scan of Upper Spinal Canal Without Contrast72141 | 36 | $77 |
| Mri Scan of Middle Spinal Canal Without Contrast72146 | 19 | $100 |
| Mri Scan of Middle Spinal Canal Without Contrast72146 | 15 | $74 |
Practice location
Mailing address
Additional practice locations (3)
- 3301 El Camino Real Ste 100Atherton, CA 94027-3803Phone: (650) 364-3080Fax: (650) 364-2004
- 24 Forrest CtSan Anselmo, CA 94960-1179Phone: (415) 883-3415Fax: (415) 883-0877
- 2351 Clay St Ste 100San Francisco, CA 94115-1931Phone: (415) 600-3143Fax: (415) 600-3123
Registry dates
- Enumerated
- 2005-12-22
- Last updated
- 2020-05-15
- Certified
- 2020-05-15
Frequently asked questions
- What is Jay Kaiser's NPI number?
- Jay Kaiser's National Provider Identifier (NPI) is 1275519001, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jay Kaiser's specialty?
- Jay Kaiser is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Jay Kaiser located?
- Jay Kaiser's practice location on file with NPPES is 1260 S Eliseo Dr, Greenbrae, CA 94904-2009.
- What is Jay Kaiser's phone number?
- The practice phone number listed in the NPPES registry for Jay Kaiser is (415) 461-9033.
- Does Jay Kaiser accept Medicare?
- Jay Kaiser is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jay Kaiser's NPI active?
- Yes — Jay Kaiser's NPI (1275519001) is active in the NPPES registry as of the last update on 2020-05-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.