Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Alex Penn

Individual provider Vascular & Interventional Radiology Physician · NPI 1972881159

Alex Penn practises Interventional Radiology in Walnut Creek, California. Graduated from University of California, San Francisco School of Medicine in 2011, 15 years ago. Practices with Solano Diagnostics Partners a Calif Limited Partnership, a 41-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
15
Trained at
University of California, San Francisco School of Medicine
Licensed in
CA
In the registry since
2011
Specialties on file
3
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Practice location Address checks out

2125 Oak Grove Rd Ste 200
Walnut Creek, CA 94598-2520
Phone: (925) 296-7150
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence A122596 (CA)
Vascular & Interventional Radiology Physician Taxonomy 2085R0204X · Licence A122596 (CA)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1972881159
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorYes
NPI enumeratedJuly 22, 2011
Last updated in NPPESJune 18, 2025
Certification dateJune 18, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERVENTIONAL RADIOLOGY
Also practisesDIAGNOSTIC RADIOLOGY
Medical schoolUNIVERSITY OF CALIFORNIA, SAN FRANCISCO SCHOOL OF MEDICINE
Graduated 2011 (15 years in practice)
Group practice Solano Diagnostics Partners A Calif Limited Partnership — 41 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations8 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients2,872
Services billed 5,432 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $590 13 payments · a meal or drink at a meeting or visit, not a fee
Travel and Lodging $422 3 payments · travel or lodging paid or reimbursed, such as to attend a conference

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Solano Diagnostics Partners a Calif Limited Partnership

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 41 clinicians in the practice; 12 are shown here.

Other providers in Walnut Creek