Mariusz Niedzwiecki
Nurse Practitioner · San Jose, CA
Mariusz Niedzwiecki is a nurse practitioner with a practice address in San Jose, California, and NPI 1083281679, issued on Jun 10, 2021. Check the license (California 95017485, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mariusz Niedzwiecki
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- 95017485 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2514 Berryessa RD, San Jose, CA 95132
- Phone
- (408) 272-1431
- Enumerated
- Jun 10, 2021
- Record last updated
- Sep 30, 2024
- Medicare enrollment
- Enrolled (PECOS I20220105002600); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 8,223 in California → Look up another NPI →
Also registered at 2514 Berryessa RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Jessica FongPharmacist1083561666
- Rushika JoshiPharmacist1588222079
- Solande Louis Xvi, NPFamily Nurse Practitioner1376284646
- Jacquelyn LowmanFamily Nurse Practitioner1235553173
Verify Mariusz Niedzwiecki in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 95017485Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average nurse practitioner in 2024
210 Medicare Part D claims for 139 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 12 claims were for opioids.
Most prescribed
- Cephalexin23 claims
- Doxycycline Monohydrate19 claims
- Amoxicillin-Clavulanate Potass13 claims
- Fluticasone Propionate13 claims
- Ofloxacin12 claims
- Albuterol Sulfate Hfa11 claims
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.
The practice group's MIPS final score for 2023 (Medicare payment program): 83.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 3 group practices
- Clinic Services OF California Medical Group IncLa Mesa, CA
- Sharp Rees-Stealy Medical Group IncSan Diego, CA
- Team Physicians OF Northern California Medical Group IncLa Mesa, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mariusz Niedzwiecki among 8,223 nurse practitioner records in California
Mariusz Niedzwiecki is one of 8,223 nurse practitioner records with a practice address in California. 65% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 71% of them.
- NPI issued2021 · 71% of these records are older, 23% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileYes · 42% of these records are
- Graduated2020 · median 2017 among the 3,425 with a school on file
- Record last updated2024 · 45% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nurse Practitioner providers in California
There are 8,223 nurse practitioner records in California.
All 8,223 in California → Every provider in San Jose → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Pega Montazeri, PMHNPSan Jose, CA 951311881226769
- Mengya WangSan Jose, CA 951311710863667
- Mandeep Gill, NPSan Jose, CA 951301568012144
- Irene Wong, N.P.San Jose, CA 951301366516205
- Quan CaoSan Jose, CA 951281679037543
- Irina Carmack, NPSan Jose, CA 951281659870343
- Diane Castignani, FNPSan Jose, CA 951281881132801
- Sandra Huizar-Herrera, NPSan Jose, CA 951281801340047
Common questions
What is Mariusz Niedzwiecki's NPI number?
Mariusz Niedzwiecki's National Provider Identifier (NPI) is 1083281679, issued on Jun 10, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Mariusz Niedzwiecki located?
The NPPES record lists a practice address at 2514 Berryessa RD, San Jose, CA, 95132. Phone: (408) 272-1431. Providers update this record themselves, so call before visiting.
How can I verify Mariusz Niedzwiecki's license?
NPPES lists California license number 95017485, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Mariusz Niedzwiecki prescribe under Medicare Part D?
In 2024, Mariusz Niedzwiecki had 210 Medicare Part D claims for 139 beneficiaries; the average among nurse practitioner prescribers was 1,109. Part D covers Medicare prescriptions only.
What is Mariusz Niedzwiecki's MIPS final score?
The 2023 MIPS final score is 83.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.