Joseph Janizek, MD, PHD
NPI 1689426058 · Diagnostic Radiology Physician · Stanford, CA
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joseph Janizek, MD, PHD is a Diagnostic Radiology Physician provider in Stanford, CA (NPI 1689426058).
Provider details
- NPI number
- 1689426058
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Male
- Sole proprietor
- No
- License
- A203295 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
2 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2024-04-01
- Last updated
- 2025-06-28
- Certified
- 2025-06-28
Frequently asked questions
- What is Joseph Janizek's NPI number?
- Joseph Janizek's National Provider Identifier (NPI) is 1689426058, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joseph Janizek's specialty?
- Joseph Janizek is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Joseph Janizek located?
- Joseph Janizek's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305-2200.
- What is Joseph Janizek's phone number?
- The practice phone number listed in the NPPES registry for Joseph Janizek is (650) 723-6855.
- Does Joseph Janizek accept Medicare?
- Joseph Janizek is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joseph Janizek's NPI active?
- Yes — Joseph Janizek's NPI (1689426058) is active in the NPPES registry as of the last update on 2025-06-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.