Mariusz Niedzwiecki, NP
Nurse Practitioner · La Mesa
- 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
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 itOverall 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.
| Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections | 0.42 | Better | Oct 2024 – Sep 2025 |
| Central Line Associated Bloodstream Infection (ICU + select Wards)Infections | 0.405 | Better | Oct 2024 – Sep 2025 |
| Clostridium Difficile (C.Diff)Infections | 0.402 | Better | Oct 2024 – Sep 2025 |
| Abdominopelvic accidental puncture or laceration rateComplications and deaths | 0.95 (0.03 to 1.87) · 1,794 cases | No different | Jul 2022 – Jun 2024 |
| CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths | 1.22 (0.93 to 1.51) | No different | Jul 2022 – Jun 2024 |
| Death rate among surgical inpatients with serious treatable complicationsComplications and deaths | 178.41 (138.56 to 218.26) · 130 cases | No different | Jul 2022 – Jun 2024 |
| Death rate for CABG surgery patientsComplications and deaths | 1.6 · 65 cases | None | Jul 2022 – Jun 2025 |
| Death rate for COPD patientsComplications and deaths | 9.9 · 241 cases | None | Jul 2022 – Jun 2025 |
| Death rate for heart attack patientsComplications and deaths | 11.5 · 182 cases | None | Jul 2022 – Jun 2025 |
| Death rate for heart failure patientsComplications and deaths | 10.2 · 541 cases | None | Jul 2022 – Jun 2025 |
| Death rate for pneumonia patientsComplications and deaths | 13.5 · 696 cases | None | Jul 2022 – Jun 2025 |
| Death rate for stroke patientsComplications and deaths | 10.5 · 565 cases | None | Jul 2023 – Jun 2025 |
| Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths | 3.4 · 5,543 cases | None | Jul 2024 – Jun 2025 |
| Iatrogenic pneumothorax rateComplications and deaths | 0.22 (0.03 to 0.4) · 11,498 cases | No different | Jul 2022 – Jun 2024 |
| In-hospital fall-associated fracture rateComplications and deaths | 0.18 (0 to 0.36) · 11,909 cases | No different | Jul 2022 – Jun 2024 |
| Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths | 2.9 (1 to 4.81) · 2,033 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative acute kidney injury requiring dialysis rateComplications and deaths | 1.7 (0.16 to 3.24) · 594 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative hemorrhage or hematoma rateComplications and deaths | 2.07 (0.71 to 3.44) · 1,940 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative respiratory failure rateComplications and deaths | 14.67 (7.88 to 21.46) · 587 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative sepsis rateComplications and deaths | 5.04 (1.4 to 8.69) · 568 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative wound dehiscence rateComplications and deaths | 1.55 (0.11 to 2.98) · 484 cases | No different | Jul 2022 – Jun 2024 |
| Pressure ulcer rateComplications and deaths | 1.11 (0.61 to 1.6) · 9,450 cases | No different | Jul 2022 – Jun 2024 |
| Rate of complications for hip/knee replacement patientsComplications and deaths | 3.1 · 94 cases | None | Apr 2023 – Mar 2025 |
| MRSA BacteremiaInfections | 0.767 | No different | Oct 2024 – Sep 2025 |
| SSI - Colon SurgeryInfections | 0.204 | No different | Oct 2024 – Sep 2025 |
| Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits | 14.8 · 298 cases | None | Jul 2023 – Jun 2025 |
| Heart failure (HF) 30-Day Readmission RateUnplanned return visits | 22.8 · 979 cases | None | Jul 2023 – Jun 2025 |
| Hospital return days for heart attack patientsUnplanned return visits | 12.1 · 191 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for heart failure patientsUnplanned return visits | 14.3 · 652 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for pneumonia patientsUnplanned return visits | 22.8 · 757 cases | None | Jul 2022 – Jun 2025 |
| Pneumonia (PN) 30-Day Readmission RateUnplanned return visits | 18.4 · 1,071 cases | None | Jul 2023 – Jun 2025 |
| Rate of emergency department (ED) visits for patients receiving outpatient chemotherapyUnplanned return visits | 4.6 (3 to 6.9) · 99 cases | No different | Jan 2024 – Dec 2024 |
| Rate of inpatient admissions for patients receiving outpatient chemotherapyUnplanned return visits | 9.9 (7 to 13.7) · 99 cases | No different | Jan 2024 – Dec 2024 |
| Rate of readmission after hip/knee replacementUnplanned return visits | 5.3 · 103 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for CABGUnplanned return visits | 12.2 · 83 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits | 20.5 · 415 cases | None | Jul 2023 – Jun 2025 |
| Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits | 13.4 (10.5 to 17.5) · 981 cases | No different | Jan 2022 – Dec 2024 |
| Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits | 1 (0.8 to 1.3) · 407 cases | No different | Jan 2024 – Dec 2024 |
What patients said (3,466 patients answered, 18% of those asked)
| Cleanliness | 4 |
| Nurse communication | 3 |
| Doctor communication | 2 |
| Communication about medicines | 3 |
| Discharge information | 3 |
| Overall hospital rating | 3 |
| Quietness | 2 |
| Recommend hospital | 4 |
| Room was "always" clean | 76% |
| Nurses "always" communicated well | 77% |
| Doctors "always" communicated well | 76% |
| Staff "always" explained | 60% |
| Yes, staff "did" give patients this information | 86% |
| Yes, staff "did" give patients information about help after discharge | 86% |
| Doctors "always" explained things so they could understand | 70% |
| Doctors "always" listened carefully | 74% |
| Doctors "always" treated them with courtesy and respect | 83% |
| Patients who gave a rating of "9" or "10" (high) | 70% |
| Staff "always" explained new medications | 72% |
| Nurses "always" explained things so they could understand | 73% |
| Nurses "always" listened carefully | 74% |
| Nurses "always" treated them with courtesy and respect | 84% |
| "Always" quiet at night | 48% |
| "YES", patients would definitely recommend the hospital | 69% |
| Staff "always" explained possible side effects | 47% |
| Yes, staff "did" give patients information about possible symptoms | 86% |
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.
| 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 making | 13 | $1,221 | $81 |
See all 9 services
| 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 making | 13 | $1,221 | $81 |
| Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus | 18 | $623 | $35 |
| Detection test by immunoassay with direct visual observation for influenza virus | 12 | $357 | $16 |
| Insertion of needle into vein for collection of blood sample | 23 | $180 | $8 |
| Automated urinalysis test | 18 | $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
| 2024 | 158 | 329 | 74 | 1.03 | $79,966 | $16,460 |
| 2023 | 57 | 144 | 73 | 0.88 | $22,602 | $6,984 |
| 2022 | 22 | 35 | 75 | 0.89 | $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
| 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.
| EMERGENCY DEPT VISIT LOW MDM | 104 | $60,095 |
| Service | 125 | $37,209 |
| COMPREHENSIVE METABOLIC PANEL | 99 | $4,397 |
| Blood count; complete (CBC), automated (Hgb, Hct, RBC, WBC and platelet count) and automated differential WBC count | 106 | $2,093 |
| Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml | 12 | $1,777 |
| Service | 39 | $1,454 |
| Therapeutic, prophylactic, or diagnostic injection (specify substance or drug); subcutaneous or intramuscular | 36 | $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 microscopy | 92 | $1,169 |
| X-RAY EXAM OF FOOT | 15 | $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 technique | 19 | $920 |
| ASSAY OF LIPASE | 37 | $768 |
| Culture, bacterial; quantitative colony count, urine | 12 | $384 |
| 2024 | 737 | 13 | 56 | $112,730 |
| 2023 | 28 | 2 | 16 | $11 |
See the largest Medicaid services in earlier years
2023
| Handling and/or conveyance of specimen for transfer from physician office to laboratory | 16 | $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.
| Albuterol Sulfate Hfa | 11 | $540 | $49 |
| Ofloxacin | 12 | $415 | $35 |
| Doxycycline Monohydrate | 19 | $205 | $11 |
| Fluticasone Propionate | 13 | $149 | $11 |
| Cephalexin | 23 | $147 | $6 |
See all 6 drugs
| Albuterol Sulfate Hfa | 11 | $540 | $49 |
| Ofloxacin | 12 | $415 | $35 |
| Doxycycline Monohydrate | 19 | $205 | $11 |
| Fluticasone Propionate | 13 | $149 | $11 |
| Cephalexin | 23 | $147 | $6 |
| Amoxicillin-Clavulanate Potass | 13 | $125 | $10 |
Year by year
| 2024 | 210 | 139 | 6% (12) | 10% | $3,075 |
| 2023 | 183 | 131 | 0% (0) | None | $3,879 |
| 2022 | 113 | 77 | 0% (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
| Fluticasone Propionate | 22 | $205 | $9 |
| Cephalexin | 16 | $135 | $8 |
| Nitrofurantoin Mono-Macro | 11 | $133 | $12 |
2022: 1 drug
| Ibuprofen | 12 | $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.