Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Mariusz Niedzwiecki

Individual provider Family Nurse Practitioner · NPI 1083281679

Mariusz Niedzwiecki is a Nurse Practitioner in San Jose, California. Qualified in 2020, 6 years ago. Practices with Sharp Rees-Stealy Medical Group Inc, a 874-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
6
Licensed in
CA
In the registry since
2021
Specialties on file
2
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Practice location Address checks out

2514 Berryessa Rd
San Jose, CA 95132-2947
Phone: (408) 272-1431
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Nurse Practitioner (primary) Taxonomy 363L00000X · Licence 95017485 (CA)
Family Nurse Practitioner Taxonomy 363LF0000X · Licence 95017485 (CA)

Record details

NPI number1083281679
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedJune 10, 2021
Last updated in NPPESSeptember 30, 2024
Certification dateSeptember 30, 2024

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 Sharp Rees-Stealy Medical Group Inc — 874 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 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 patients158
Services billed 329 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Sharp Rees-Stealy Medical Group Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 874 clinicians in the practice; 12 are shown here.

Other providers in San Jose