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Mariusz Niedzwiecki, NP

Nurse Practitioner · La Mesa

NPI 1083281679

Medicare standing
Clear
Enrolled, allowed to bill and order, not excluded
Plans that list them
Not verified
Not the same as out of network.
Offices
3
Since medical school
6 years
Graduated 2020

Offices

3 locations · Team Physicians of Northern California Medical Group Inc · Clinic Services of California Medical Group Inc · Sharp Rees-Stealy Medical Group Inc

Looking this up.

Hospitals listed: Grossmont Hospital. That is not proof they admit you there this week.

Plan participation

Not verified

We could not verify current plan participation for this doctor. This does not mean they are out of network. Call Mariusz Niedzwiecki’s office to ask if they take your plan before you enroll.

Hospitals they work in

1 hospital

These rate the hospital, not this clinician. Most measures at most hospitals are no different from the national rate.

  • Grossmont HospitalLa Mesa, CAAcute Care Hospital · Government - Hospital District or Authority · Has an emergency department · Birthing-friendlyPart of Sharp Healthcare, which runs 6 hospitalsPatients rate it 3 of 5 · 69% would definitely recommend it
    Overall rating: 4 of 5 starsBetter than the national rate — Catheter Associated Urinary Tract Infections (ICU + select Wards): 0.42, Oct 2024 – Sep 2025Better than the national rate — Central Line Associated Bloodstream Infection (ICU + select Wards): 0.405, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.402, Oct 2024 – Sep 2025
See every measure and the patient survey for Grossmont Hospital

Behind the star rating — Deaths: 0 better, 8 the same, 0 worse of 8 measures. Safety: 5 better, 2 the same, 0 worse of 7 measures. Readmissions: 0 better, 9 the same, 2 worse of 11 measures. The star rating is worked out from an earlier period than the measures below, so the two can disagree.

Every scored measure at Grossmont Hospital
Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections0.42BetterOct 2024 – Sep 2025
Central Line Associated Bloodstream Infection (ICU + select Wards)Infections0.405BetterOct 2024 – Sep 2025
Clostridium Difficile (C.Diff)Infections0.402BetterOct 2024 – Sep 2025
Abdominopelvic accidental puncture or laceration rateComplications and deaths0.95 (0.03 to 1.87) · 1,794 casesNo differentJul 2022 – Jun 2024
CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths1.22 (0.93 to 1.51)No differentJul 2022 – Jun 2024
Death rate among surgical inpatients with serious treatable complicationsComplications and deaths178.41 (138.56 to 218.26) · 130 casesNo differentJul 2022 – Jun 2024
Death rate for CABG surgery patientsComplications and deaths1.6 · 65 casesNoneJul 2022 – Jun 2025
Death rate for COPD patientsComplications and deaths9.9 · 241 casesNoneJul 2022 – Jun 2025
Death rate for heart attack patientsComplications and deaths11.5 · 182 casesNoneJul 2022 – Jun 2025
Death rate for heart failure patientsComplications and deaths10.2 · 541 casesNoneJul 2022 – Jun 2025
Death rate for pneumonia patientsComplications and deaths13.5 · 696 casesNoneJul 2022 – Jun 2025
Death rate for stroke patientsComplications and deaths10.5 · 565 casesNoneJul 2023 – Jun 2025
Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths3.4 · 5,543 casesNoneJul 2024 – Jun 2025
Iatrogenic pneumothorax rateComplications and deaths0.22 (0.03 to 0.4) · 11,498 casesNo differentJul 2022 – Jun 2024
In-hospital fall-associated fracture rateComplications and deaths0.18 (0 to 0.36) · 11,909 casesNo differentJul 2022 – Jun 2024
Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths2.9 (1 to 4.81) · 2,033 casesNo differentJul 2022 – Jun 2024
Postoperative acute kidney injury requiring dialysis rateComplications and deaths1.7 (0.16 to 3.24) · 594 casesNo differentJul 2022 – Jun 2024
Postoperative hemorrhage or hematoma rateComplications and deaths2.07 (0.71 to 3.44) · 1,940 casesNo differentJul 2022 – Jun 2024
Postoperative respiratory failure rateComplications and deaths14.67 (7.88 to 21.46) · 587 casesNo differentJul 2022 – Jun 2024
Postoperative sepsis rateComplications and deaths5.04 (1.4 to 8.69) · 568 casesNo differentJul 2022 – Jun 2024
Postoperative wound dehiscence rateComplications and deaths1.55 (0.11 to 2.98) · 484 casesNo differentJul 2022 – Jun 2024
Pressure ulcer rateComplications and deaths1.11 (0.61 to 1.6) · 9,450 casesNo differentJul 2022 – Jun 2024
Rate of complications for hip/knee replacement patientsComplications and deaths3.1 · 94 casesNoneApr 2023 – Mar 2025
MRSA BacteremiaInfections0.767No differentOct 2024 – Sep 2025
SSI - Colon SurgeryInfections0.204No differentOct 2024 – Sep 2025
Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits14.8 · 298 casesNoneJul 2023 – Jun 2025
Heart failure (HF) 30-Day Readmission RateUnplanned return visits22.8 · 979 casesNoneJul 2023 – Jun 2025
Hospital return days for heart attack patientsUnplanned return visits12.1 · 191 casesNoneJul 2022 – Jun 2025
Hospital return days for heart failure patientsUnplanned return visits14.3 · 652 casesNoneJul 2022 – Jun 2025
Hospital return days for pneumonia patientsUnplanned return visits22.8 · 757 casesNoneJul 2022 – Jun 2025
Pneumonia (PN) 30-Day Readmission RateUnplanned return visits18.4 · 1,071 casesNoneJul 2023 – Jun 2025
Rate of emergency department (ED) visits for patients receiving outpatient chemotherapyUnplanned return visits4.6 (3 to 6.9) · 99 casesNo differentJan 2024 – Dec 2024
Rate of inpatient admissions for patients receiving outpatient chemotherapyUnplanned return visits9.9 (7 to 13.7) · 99 casesNo differentJan 2024 – Dec 2024
Rate of readmission after hip/knee replacementUnplanned return visits5.3 · 103 casesNoneJul 2023 – Jun 2025
Rate of readmission for CABGUnplanned return visits12.2 · 83 casesNoneJul 2023 – Jun 2025
Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits20.5 · 415 casesNoneJul 2023 – Jun 2025
Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits13.4 (10.5 to 17.5) · 981 casesNo differentJan 2022 – Dec 2024
Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits1 (0.8 to 1.3) · 407 casesNo differentJan 2024 – Dec 2024

What patients said (3,466 patients answered, 18% of those asked)

Patient survey stars by topic at Grossmont Hospital
Cleanliness4
Nurse communication3
Doctor communication2
Communication about medicines3
Discharge information3
Overall hospital rating3
Quietness2
Recommend hospital4
Share of patients giving the best answer at Grossmont Hospital
Room was "always" clean76%
Nurses "always" communicated well77%
Doctors "always" communicated well76%
Staff "always" explained60%
Yes, staff "did" give patients this information86%
Yes, staff "did" give patients information about help after discharge86%
Doctors "always" explained things so they could understand70%
Doctors "always" listened carefully74%
Doctors "always" treated them with courtesy and respect83%
Patients who gave a rating of "9" or "10" (high)70%
Staff "always" explained new medications72%
Nurses "always" explained things so they could understand73%
Nurses "always" listened carefully74%
Nurses "always" treated them with courtesy and respect84%
"Always" quiet at night48%
"YES", patients would definitely recommend the hospital69%
Staff "always" explained possible side effects47%
Yes, staff "did" give patients information about possible symptoms86%

Original Medicare doctor bills

$16,460

Medicare paid this office $16,460 for 158 people.

This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.

Largest Original Medicare bills
Return visit (30+ min)60$5,084$85
New patient visit (45+ min)26$2,443$94
Long return visit (40+ min)18$2,228$124
Short return visit (20+ min)30$1,705$57
Emergency department visit with moderate level of medical decision making13$1,221$81
See all 9 services
Every Original Medicare service billed
Return visit (30+ min)60$5,084$85
New patient visit (45+ min)26$2,443$94
Long return visit (40+ min)18$2,228$124
Short return visit (20+ min)30$1,705$57
Emergency department visit with moderate level of medical decision making13$1,221$81
Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus18$623$35
Detection test by immunoassay with direct visual observation for influenza virus12$357$16
Insertion of needle into vein for collection of blood sample23$180$8
Automated urinalysis test18$40$2

Who their Medicare patients are

158 Original Medicare patients in 2024. Average age 74 · Under 65 10% · 85 and older 14% · Women 61% · Also on Medicaid 27% · Health risk score 1.03. At or below the middle of the specialty; the typical nurse practitioner clinician is at 1.42.

Conditions among them: High blood pressure 75% · Diabetes 33% · Chronic kidney disease 23% · Coronary heart disease 20% · Depression 19% · Heart failure 15% · COPD 14% · Atrial fibrillation 14% · Cancer 9% · Stroke 8%.

The office billed $79,966, Medicare allowed $22,159 and paid $16,460; for 329 services of 42 kinds; $45 of it was for drugs given in the office and $16,415 for care.

Original Medicare patients only. A risk score of 1.0 is the average Medicare patient; higher means sicker. Any count under 11 is hidden.

Year by year

Original Medicare by year
2024158329741.03$79,966$16,460
202357144730.88$22,602$6,984
20222235750.89$3,342$2,001

Original Medicare only. A service billed for fewer than 11 people in a year is hidden, so the lines can add up to less than the year's total.

See the services billed each year

2023: 3 services

Original Medicare services billed in 2023
Return visit (30+ min)25$2,360$94
New patient visit (45+ min)11$1,317$120
Short return visit (20+ min)11$722$66

Medicaid work

$112,730 in 2024

Medicaid paid $112,730 for 737 billed services this clinician did in 2024, up to 56 people in a month for one service.

Medicaid and CHIP claims where this clinician did the service, fee-for-service and managed care together. Any month with fewer than 11 patients is hidden, so small Medicaid practices undercount.

Largest Medicaid services in 2024
EMERGENCY DEPT VISIT LOW MDM104$60,095
Service125$37,209
COMPREHENSIVE METABOLIC PANEL99$4,397
Blood count; complete (CBC), automated (Hgb, Hct, RBC, WBC and platelet count) and automated differential WBC count106$2,093
Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml12$1,777
Service39$1,454
Therapeutic, prophylactic, or diagnostic injection (specify substance or drug); subcutaneous or intramuscular36$1,246
Urinalysis, by dip stick or tablet reagent for bilirubin, glucose, hemoglobin, ketones, leukocytes, nitrite, pH, protein, specific gravity, urobilinogen, any number of these constituents; automated, with microscopy92$1,169
X-RAY EXAM OF FOOT15$1,091
Infectious agent detection by nucleic acid (DNA or RNA); severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) (coronavirus disease [COVID-19]) and influenza virus types A and B, multiplex amplified probe technique19$920
ASSAY OF LIPASE37$768
Culture, bacterial; quantitative colony count, urine12$384
Medicaid work by year
20247371356$112,730
202328216$11
See the largest Medicaid services in earlier years

2023

Largest Medicaid services in 2023
Handling and/or conveyance of specimen for transfer from physician office to laboratory16$11
Services provided in an urgent care center (list in addition to code for service)12$0

Drugs they prescribed that Part D paid

$3,075

Pharmacies billed $3,075 in 2024.

This is pharmacy cost, not the office bill, and not what patients paid.

Opioids were 6% of their Part D prescriptions (12 of 210) in 2024. Above the middle of the specialty; the typical nurse practitioner clinician is at 0%.

188 generic and 22 brand-name prescriptions · $3,075 in drug cost · 74 antibiotic prescriptions to 68 people.

Part D prescriptions only. The opioid rate is opioid prescriptions as a share of all this clinician's Part D prescriptions; surgeons and pain specialists run higher than others, so it is shown against the same specialty.

Largest Part D drug costs
Albuterol Sulfate Hfa11$540$49
Ofloxacin12$415$35
Doxycycline Monohydrate19$205$11
Fluticasone Propionate13$149$11
Cephalexin23$147$6
See all 6 drugs
Every Part D drug this clinician prescribed
Albuterol Sulfate Hfa11$540$49
Ofloxacin12$415$35
Doxycycline Monohydrate19$205$11
Fluticasone Propionate13$149$11
Cephalexin23$147$6
Amoxicillin-Clavulanate Potass13$125$10

Year by year

Part D prescribing by year
20242101396% (12)10%$3,075
20231831310% (0)None$3,879
2022113770% (0)None$3,267

Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.

See the drugs prescribed each year

2023: 3 drugs

Part D drugs prescribed in 2023
Fluticasone Propionate22$205$9
Cephalexin16$135$8
Nitrofurantoin Mono-Macro11$133$12

2022: 1 drug

Part D drugs prescribed in 2022
Ibuprofen12$40$3

Checkups this office reported

Medicare did not publish checkup rates for this clinician.

Medicare’s overall office score
83.6 / 100
Scores the office’s reporting and systems. It is not a grade for how the doctor treats you.

Professional record

NPI
1083281679
Licence
CA 95017485
Group
Team Physicians of Northern California Medical Group Inc · Clinic Services of California Medical Group Inc · Sharp Rees-Stealy Medical Group Inc
Gender
Male
More record details
Sole proprietor
No
Taxonomy
Nurse practitioner (363L00000X); Federal specialty code 363LF0000X (363LF0000X)
Mailing address
2514 Berryessa Rd, San Jose, CA, 95132
NPI first listed
2021-06-10
NPI last updated
2024-09-30
NPI record certified
2024-09-30

This is when the NPI record was last certified, not a medical board exam.

This office lists an electronic records connection.