Joseph David Janizek, MD, PHD
Diagnostic Radiology Physician · Stanford, CA
Joseph David Janizek, MD, PHD is a diagnostic radiology physician with a practice address in Stanford, California, and NPI 1689426058, issued on Apr 1, 2024. Check the license (California A203295, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Joseph David Janizek
- Credential
- MD, PHD
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License number
- A203295 CA
Self-reported in NPPES; status is on the state search - Practice location
- 300 Pasteur Dr, Stanford, CA 94305
- Phone
- (650) 723-6855
- Enumerated
- Apr 1, 2024
- Record last updated
- Jun 28, 2025
- Entity
- Type 1 · individual
Also registered at 300 Pasteur Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Cooper Aakhus, MDEmergency Medicine Physician1194351007
- Oliver Aalami, M.D.Vascular Surgery Physician1225229024
- Alistair Aaronson, MDInternal Medicine Physician1457628760
- Sumaira Aasi, MDMOHS-Micrographic Surgery Physician1780675181
- Fahim Abbasi, M.D.Internal Medicine Physician1841484037
- Mohamad Abbass, MDNeurological Surgery Physician1679492151
Verify Joseph David Janizek in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A203295Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
49% fewer Medicare Part D claims than the average diagnostic radiology physician in 2024
26 Medicare Part D claims for 13 beneficiaries, against an average of 51 among the 2,711 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.
235 diagnostic radiology physician records list a practice address in Stanford
They are 235 of the 5,606 NPPES records with a practice address in Stanford, and 4,500 diagnostic radiology physician records in California.
All 235 in Stanford → All 4,500 in California → Every provider in Stanford →
Other diagnostic radiology physician records in California
- Jason Aaronson, MDLos Angeles, CA1023145463
- Brianna Abadie, M.D.Van Nuys, CA1861811291
- Kenric Aban, M.D.Oceanside, CA1336218023
- Pablo Abbona, MDLos Angeles, CA1689856239
- Rashed AbdelaalRiverside, CA1518726090
- Ahmed Abdelhalim, MDRiverside, CA1275162927
- Fatemeh Abdollahi Mofakham, MDLos Angeles, CA1659652915
- Bennett Abe, MDVisalia, CA1184731283
- Stephen Abedon, M.D.Daly City, CA1689628687
- Richard Abello, M.D.La Jolla, CA1245205996
Common questions
What is Joseph David Janizek, MD, PHD's NPI number?
Joseph David Janizek, MD, PHD's National Provider Identifier (NPI) is 1689426058, issued on Apr 1, 2024. An NPI identifies a provider in billing; it is not a license.
Where is Joseph David Janizek, MD, PHD located?
The NPPES record lists a practice address at 300 Pasteur Dr, Stanford, CA, 94305. Phone: (650) 723-6855. Providers update this record themselves, so call before visiting.
How can I verify Joseph David Janizek, MD, PHD's license?
NPPES lists California license number A203295, 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 Joseph David Janizek, MD, PHD prescribe under Medicare Part D?
In 2024, Joseph David Janizek, MD, PHD had 26 Medicare Part D claims for 13 beneficiaries; the average among diagnostic radiology physician prescribers was 51. 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.