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

Alex Martinelli, NP

Individual provider Critical Care Medicine Nurse Practitioner · NPI 1871102905

Alex Martinelli, NP is a Nurse Practitioner in Stanford, California. Qualified in 2020, 6 years ago. Practices with University Hospitals St John Medical Center, a 29-clinician group and accepts Medicare assignment. Licensed in California and Wisconsin.

Years since qualifying
6
Licensed in
CA, WI
In the registry since
2020
Specialties on file
2
What do these letters mean?
NP — Nurse Practitioner
An advanced practice nurse who can diagnose, treat and in most states prescribe.

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Practice location Address checks out

300 Pasteur Dr
Stanford, CA 94305-2200
Phone: (650) 723-4000
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Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Nurse Practitioner (primary) Taxonomy 363L00000X · Licence 95017395 (CA)
Critical Care Medicine Nurse Practitioner Taxonomy 363LC0200X · Licence 185382 (WI)

Record details

NPI number1871102905
Entity typeIndividual (Type 1)
GenderMale
Credentials NP
Sole proprietorNo
NPI enumeratedJuly 24, 2020
Last updated in NPPESApril 24, 2023
Certification dateApril 24, 2023

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2020 (6 years in practice)
Group practice University Hospitals St. John Medical Center — 29 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 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 patients51
Services billed 62 a service is one billed item, such as a visit, a test or a procedure
Average patient age77

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 $38 1 payment · a meal or drink at a meeting or visit, not a fee

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 University Hospitals St John Medical Center

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 29 clinicians in the practice; 12 are shown here.

Other providers in Stanford