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Shaun Michael Pienkos, MD

Pulmonary Disease · Stanford

NPI 1245735208

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

Offices

3 locations · Stanford Health Care · University Healthcare Alliance

Looking this up.

Hospitals listed: Good Samaritan Hospital · Stanford Health Care · Stanford Health Care Tri-Valley. 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 Dr. Pienkos’s office to ask if they take your plan before you enroll.

Hospitals they work in

3 hospitals

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

  • Good Samaritan HospitalSan Jose, CAAcute Care Hospital · Proprietary · Has an emergency department · Birthing-friendlyPart of HCA Healthcare, which runs 185 hospitals in 19 statesPatients rate it 2 of 5 · 67% would definitely recommend it
    Overall rating: 2 of 5 starsBetter than the national rate — Clostridium Difficile (C.Diff): 0.337, Oct 2024 – Sep 2025
  • Stanford Health CareStanford, CAAcute Care Hospital · Voluntary non-profit - Private · Has an emergency departmentPart of Stanford Health Care, which runs 3 hospitalsHome of Stanford Cancer Institute, a National Cancer Institute designated comprehensive cancer centrePatients rate it 4 of 5 · 83% would definitely recommend it
    Overall rating: 5 of 5 starsWorse than the national rate — Perioperative pulmonary embolism or deep vein thrombosis rate: 5.31 (4.24 to 6.37) · 8,661 cases, Jul 2022 – Jun 2024Worse than the national rate — Rate of inpatient admissions for patients receiving outpatient chemotherapy: 14.1 (12.7 to 15.7) · 2,191 cases, Jan 2024 – Dec 2024Better than the national rate — Postoperative respiratory failure rate: 4.08 (1.95 to 6.21) · 5,296 cases, Jul 2022 – Jun 2024Better than the national rate — Catheter Associated Urinary Tract Infections (ICU + select Wards): 0.317, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.446, Oct 2024 – Sep 2025Better than the national rate — SSI - Colon Surgery: 0.241, Oct 2024 – Sep 2025Better than the national rate — Ratio of unplanned hospital visits after hospital outpatient surgery: 0.7 (0.6 to 0.9) · 3,348 cases, Jan 2024 – Dec 2024
  • Stanford Health Care Tri-ValleyPleasanton, CAAcute Care Hospital · Voluntary non-profit - Private · Has an emergency department · Birthing-friendlyPart of Stanford Health Care, which runs 3 hospitalsPatients rate it 3 of 5 · 74% would definitely recommend it
    Overall rating: 5 of 5 starsBetter than the national rate — Central Line Associated Bloodstream Infection (ICU + select Wards): 0.178, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.237, Oct 2024 – Sep 2025
See every measure and the patient survey for Good Samaritan Hospital

Behind the star rating — Deaths: 0 better, 8 the same, 0 worse of 8 measures. Safety: 1 better, 6 the same, 1 worse of 8 measures. Readmissions: 0 better, 5 the same, 4 worse of 9 measures. The star rating is worked out from an earlier period than the measures below, so the two can disagree.

Every scored measure at Good Samaritan Hospital
Clostridium Difficile (C.Diff)Infections0.337BetterOct 2024 – Sep 2025
Abdominopelvic accidental puncture or laceration rateComplications and deaths0.75 (0 to 1.67) · 1,340 casesNo differentJul 2022 – Jun 2024
CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths0.84 (0.54 to 1.14)No differentJul 2022 – Jun 2024
Death rate among surgical inpatients with serious treatable complicationsComplications and deaths143.59 (98.7 to 188.49) · 98 casesNo differentJul 2022 – Jun 2024
Death rate for CABG surgery patientsComplications and deaths1.7 · 45 casesNoneJul 2022 – Jun 2025
Death rate for COPD patientsComplications and deaths7.1 · 100 casesNoneJul 2022 – Jun 2025
Death rate for heart attack patientsComplications and deaths12.7 · 270 casesNoneJul 2022 – Jun 2025
Death rate for heart failure patientsComplications and deaths11.3 · 573 casesNoneJul 2022 – Jun 2025
Death rate for pneumonia patientsComplications and deaths15.6 · 820 casesNoneJul 2022 – Jun 2025
Death rate for stroke patientsComplications and deaths8.5 · 482 casesNoneJul 2023 – Jun 2025
Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths3.3 · 3,711 casesNoneJul 2024 – Jun 2025
Iatrogenic pneumothorax rateComplications and deaths0.12 (0 to 0.3) · 8,866 casesNo differentJul 2022 – Jun 2024
In-hospital fall-associated fracture rateComplications and deaths0.2 (0.01 to 0.38) · 9,051 casesNo differentJul 2022 – Jun 2024
Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths2.65 (0.74 to 4.56) · 1,929 casesNo differentJul 2022 – Jun 2024
Postoperative acute kidney injury requiring dialysis rateComplications and deaths1.8 (0.21 to 3.39) · 670 casesNo differentJul 2022 – Jun 2024
Postoperative hemorrhage or hematoma rateComplications and deaths2.33 (0.88 to 3.78) · 1,836 casesNo differentJul 2022 – Jun 2024
Postoperative respiratory failure rateComplications and deaths6.73 (0 to 13.46) · 669 casesNo differentJul 2022 – Jun 2024
Postoperative sepsis rateComplications and deaths7.58 (3.96 to 11.19) · 654 casesNo differentJul 2022 – Jun 2024
Postoperative wound dehiscence rateComplications and deaths1.59 (0.13 to 3.04) · 496 casesNo differentJul 2022 – Jun 2024
Pressure ulcer rateComplications and deaths0.27 (0 to 0.87) · 7,373 casesNo differentJul 2022 – Jun 2024
Rate of complications for hip/knee replacement patientsComplications and deaths4.1 · 152 casesNoneApr 2023 – Mar 2025
Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections1.08No differentOct 2024 – Sep 2025
Central Line Associated Bloodstream Infection (ICU + select Wards)Infections0.542No differentOct 2024 – Sep 2025
MRSA BacteremiaInfections0.484No differentOct 2024 – Sep 2025
SSI - Colon SurgeryInfections1.565No differentOct 2024 – Sep 2025
Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits15.8 · 327 casesNoneJul 2023 – Jun 2025
Heart failure (HF) 30-Day Readmission RateUnplanned return visits24.2 · 703 casesNoneJul 2023 – Jun 2025
Hospital return days for heart attack patientsUnplanned return visits61.1 · 289 casesNoneJul 2022 – Jun 2025
Hospital return days for heart failure patientsUnplanned return visits36.3 · 665 casesNoneJul 2022 – Jun 2025
Hospital return days for pneumonia patientsUnplanned return visits25.4 · 856 casesNoneJul 2022 – Jun 2025
Pneumonia (PN) 30-Day Readmission RateUnplanned return visits19 · 978 casesNoneJul 2023 – Jun 2025
Rate of readmission after hip/knee replacementUnplanned return visits6.3 · 144 casesNoneJul 2023 – Jun 2025
Rate of readmission for CABGUnplanned return visits12.3 · 46 casesNoneJul 2023 – Jun 2025
Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits21.2 · 135 casesNoneJul 2023 – Jun 2025
Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits13.8 (10.1 to 18.6) · 129 casesNo differentJan 2022 – Dec 2024
Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits1.2 (0.9 to 1.5) · 531 casesNo differentJan 2024 – Dec 2024

What patients said (704 patients answered, 24% of those asked)

Patient survey stars by topic at Good Samaritan Hospital
Cleanliness3
Nurse communication3
Doctor communication2
Communication about medicines2
Discharge information3
Overall hospital rating2
Quietness1
Recommend hospital3
Share of patients giving the best answer at Good Samaritan Hospital
Room was "always" clean66%
Nurses "always" communicated well75%
Doctors "always" communicated well71%
Staff "always" explained54%
Yes, staff "did" give patients this information83%
Yes, staff "did" give patients information about help after discharge81%
Doctors "always" explained things so they could understand66%
Doctors "always" listened carefully69%
Doctors "always" treated them with courtesy and respect78%
Patients who gave a rating of "9" or "10" (high)63%
Staff "always" explained new medications68%
Nurses "always" explained things so they could understand69%
Nurses "always" listened carefully73%
Nurses "always" treated them with courtesy and respect82%
"Always" quiet at night38%
"YES", patients would definitely recommend the hospital67%
Staff "always" explained possible side effects40%
Yes, staff "did" give patients information about possible symptoms86%
See every measure and the patient survey for Stanford Health Care

Behind the star rating — Deaths: 5 better, 3 the same, 0 worse of 8 measures. Safety: 3 better, 5 the same, 0 worse of 8 measures. Readmissions: 2 better, 5 the same, 4 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 Stanford Health Care
Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths5.31 (4.24 to 6.37) · 8,661 casesWorseJul 2022 – Jun 2024
Rate of inpatient admissions for patients receiving outpatient chemotherapyUnplanned return visits14.1 (12.7 to 15.7) · 2,191 casesWorseJan 2024 – Dec 2024
Postoperative respiratory failure rateComplications and deaths4.08 (1.95 to 6.21) · 5,296 casesBetterJul 2022 – Jun 2024
Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections0.317BetterOct 2024 – Sep 2025
Clostridium Difficile (C.Diff)Infections0.446BetterOct 2024 – Sep 2025
SSI - Colon SurgeryInfections0.241BetterOct 2024 – Sep 2025
Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits0.7 (0.6 to 0.9) · 3,348 casesBetterJan 2024 – Dec 2024
Abdominopelvic accidental puncture or laceration rateComplications and deaths1.06 (0.45 to 1.67) · 5,374 casesNo differentJul 2022 – Jun 2024
CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths0.86 (0.72 to 1)No differentJul 2022 – Jun 2024
Death rate among surgical inpatients with serious treatable complicationsComplications and deaths166.09 (137.88 to 194.3) · 470 casesNo differentJul 2022 – Jun 2024
Death rate for CABG surgery patientsComplications and deaths1.1 · 192 casesNoneJul 2022 – Jun 2025
Death rate for COPD patientsComplications and deaths6.4 · 146 casesNoneJul 2022 – Jun 2025
Death rate for heart attack patientsComplications and deaths9.7 · 253 casesNoneJul 2022 – Jun 2025
Death rate for heart failure patientsComplications and deaths6.3 · 880 casesNoneJul 2022 – Jun 2025
Death rate for pneumonia patientsComplications and deaths10.3 · 935 casesNoneJul 2022 – Jun 2025
Death rate for stroke patientsComplications and deaths8.7 · 501 casesNoneJul 2023 – Jun 2025
Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths2.1 · 7,730 casesNoneJul 2024 – Jun 2025
Iatrogenic pneumothorax rateComplications and deaths0.13 (0 to 0.27) · 20,799 casesNo differentJul 2022 – Jun 2024
In-hospital fall-associated fracture rateComplications and deaths0.28 (0.14 to 0.43) · 23,182 casesNo differentJul 2022 – Jun 2024
Postoperative acute kidney injury requiring dialysis rateComplications and deaths0.94 (0.2 to 1.68) · 5,694 casesNo differentJul 2022 – Jun 2024
Postoperative hemorrhage or hematoma rateComplications and deaths2.36 (1.54 to 3.19) · 7,846 casesNo differentJul 2022 – Jun 2024
Postoperative sepsis rateComplications and deaths5.2 (3.76 to 6.64) · 5,603 casesNo differentJul 2022 – Jun 2024
Postoperative wound dehiscence rateComplications and deaths1.38 (0.23 to 2.53) · 2,211 casesNo differentJul 2022 – Jun 2024
Pressure ulcer rateComplications and deaths0.52 (0.21 to 0.83) · 19,915 casesNo differentJul 2022 – Jun 2024
Rate of complications for hip/knee replacement patientsComplications and deaths3.6 · 416 casesNoneApr 2023 – Mar 2025
Central Line Associated Bloodstream Infection (ICU + select Wards)Infections0.869No differentOct 2024 – Sep 2025
MRSA BacteremiaInfections0.857No differentOct 2024 – Sep 2025
SSI - Abdominal HysterectomyInfections0.368No differentOct 2024 – Sep 2025
Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits16.2 · 247 casesNoneJul 2023 – Jun 2025
Heart failure (HF) 30-Day Readmission RateUnplanned return visits20.5 · 1,021 casesNoneJul 2023 – Jun 2025
Hospital return days for heart attack patientsUnplanned return visits47.8 · 258 casesNoneJul 2022 – Jun 2025
Hospital return days for heart failure patientsUnplanned return visits-1.6 · 990 casesNoneJul 2022 – Jun 2025
Hospital return days for pneumonia patientsUnplanned return visits20.8 · 976 casesNoneJul 2022 – Jun 2025
Pneumonia (PN) 30-Day Readmission RateUnplanned return visits16.5 · 959 casesNoneJul 2023 – Jun 2025
Rate of emergency department (ED) visits for patients receiving outpatient chemotherapyUnplanned return visits5.2 (4.4 to 6.2) · 2,191 casesNo differentJan 2024 – Dec 2024
Rate of readmission after hip/knee replacementUnplanned return visits5.1 · 425 casesNoneJul 2023 – Jun 2025
Rate of readmission for CABGUnplanned return visits9.6 · 158 casesNoneJul 2023 – Jun 2025
Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits19.6 · 183 casesNoneJul 2023 – Jun 2025
Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits12.7 (10.4 to 15.4) · 4,578 casesNo differentJan 2022 – Dec 2024

What patients said (6,810 patients answered, 25% of those asked)

Patient survey stars by topic at Stanford Health Care
Cleanliness4
Nurse communication4
Doctor communication4
Communication about medicines3
Discharge information4
Overall hospital rating4
Quietness2
Recommend hospital5
Share of patients giving the best answer at Stanford Health Care
Room was "always" clean75%
Nurses "always" communicated well82%
Doctors "always" communicated well81%
Staff "always" explained63%
Yes, staff "did" give patients this information89%
Yes, staff "did" give patients information about help after discharge89%
Doctors "always" explained things so they could understand76%
Doctors "always" listened carefully80%
Doctors "always" treated them with courtesy and respect87%
Patients who gave a rating of "9" or "10" (high)79%
Staff "always" explained new medications76%
Nurses "always" explained things so they could understand77%
Nurses "always" listened carefully79%
Nurses "always" treated them with courtesy and respect88%
"Always" quiet at night53%
"YES", patients would definitely recommend the hospital83%
Staff "always" explained possible side effects50%
Yes, staff "did" give patients information about possible symptoms90%
See every measure and the patient survey for Stanford Health Care Tri-Valley

Behind the star rating — Deaths: 2 better, 6 the same, 0 worse of 8 measures. Safety: 2 better, 5 the same, 0 worse of 7 measures. Readmissions: 2 better, 7 the same, 0 worse of 9 measures. The star rating is worked out from an earlier period than the measures below, so the two can disagree.

Every scored measure at Stanford Health Care Tri-Valley
Central Line Associated Bloodstream Infection (ICU + select Wards)Infections0.178BetterOct 2024 – Sep 2025
Clostridium Difficile (C.Diff)Infections0.237BetterOct 2024 – Sep 2025
Abdominopelvic accidental puncture or laceration rateComplications and deaths0.79 (0 to 1.73) · 1,041 casesNo differentJul 2022 – Jun 2024
CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths0.79 (0.5 to 1.08)No differentJul 2022 – Jun 2024
Death rate among surgical inpatients with serious treatable complicationsComplications and deaths145.81 (96.5 to 195.12) · 72 casesNo differentJul 2022 – Jun 2024
Death rate for CABG surgery patientsComplications and deaths2.9 · 55 casesNoneJul 2022 – Jun 2025
Death rate for COPD patientsComplications and deaths8.6 · 92 casesNoneJul 2022 – Jun 2025
Death rate for heart attack patientsComplications and deaths12.5 · 96 casesNoneJul 2022 – Jun 2025
Death rate for heart failure patientsComplications and deaths9.5 · 395 casesNoneJul 2022 – Jun 2025
Death rate for pneumonia patientsComplications and deaths10.3 · 391 casesNoneJul 2022 – Jun 2025
Death rate for stroke patientsComplications and deaths10.1 · 162 casesNoneJul 2023 – Jun 2025
Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths3 · 1,736 casesNoneJul 2024 – Jun 2025
Iatrogenic pneumothorax rateComplications and deaths0.16 (0 to 0.37) · 4,425 casesNo differentJul 2022 – Jun 2024
In-hospital fall-associated fracture rateComplications and deaths0.22 (0.02 to 0.41) · 4,771 casesNo differentJul 2022 – Jun 2024
Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths3.45 (1.46 to 5.44) · 1,403 casesNo differentJul 2022 – Jun 2024
Postoperative acute kidney injury requiring dialysis rateComplications and deaths1.5 (0.05 to 2.94) · 645 casesNo differentJul 2022 – Jun 2024
Postoperative hemorrhage or hematoma rateComplications and deaths1.81 (0.38 to 3.24) · 1,279 casesNo differentJul 2022 – Jun 2024
Postoperative respiratory failure rateComplications and deaths8.53 (3.2 to 13.85) · 639 casesNo differentJul 2022 – Jun 2024
Postoperative sepsis rateComplications and deaths5.15 (1.89 to 8.41) · 648 casesNo differentJul 2022 – Jun 2024
Postoperative wound dehiscence rateComplications and deaths1.61 (0.14 to 3.07) · 370 casesNo differentJul 2022 – Jun 2024
Pressure ulcer rateComplications and deaths0.16 (0 to 0.83) · 4,160 casesNo differentJul 2022 – Jun 2024
Rate of complications for hip/knee replacement patientsComplications and deaths4 · 74 casesNoneApr 2023 – Mar 2025
Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections0.369No differentOct 2024 – Sep 2025
MRSA BacteremiaInfections1.112No differentOct 2024 – Sep 2025
SSI - Colon SurgeryInfections0No differentOct 2024 – Sep 2025
Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits13.1 · 110 casesNoneJul 2023 – Jun 2025
Heart failure (HF) 30-Day Readmission RateUnplanned return visits20.1 · 437 casesNoneJul 2023 – Jun 2025
Hospital return days for heart attack patientsUnplanned return visits-5.8 · 94 casesNoneJul 2022 – Jun 2025
Hospital return days for heart failure patientsUnplanned return visits-19.3 · 456 casesNoneJul 2022 – Jun 2025
Hospital return days for pneumonia patientsUnplanned return visits-0.3 · 402 casesNoneJul 2022 – Jun 2025
Pneumonia (PN) 30-Day Readmission RateUnplanned return visits15.8 · 358 casesNoneJul 2023 – Jun 2025
Rate of emergency department (ED) visits for patients receiving outpatient chemotherapyUnplanned return visits6.8 (4.7 to 9.6) · 198 casesNo differentJan 2024 – Dec 2024
Rate of inpatient admissions for patients receiving outpatient chemotherapyUnplanned return visits10.1 (7.5 to 13.6) · 198 casesNo differentJan 2024 – Dec 2024
Rate of readmission after hip/knee replacementUnplanned return visits5.3 · 80 casesNoneJul 2023 – Jun 2025
Rate of readmission for CABGUnplanned return visits10.9 · 46 casesNoneJul 2023 – Jun 2025
Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits19.3 · 92 casesNoneJul 2023 – Jun 2025
Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits12.4 (9.6 to 16.2) · 1,532 casesNo differentJan 2022 – Dec 2024
Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits1 (0.8 to 1.2) · 929 casesNo differentJan 2024 – Dec 2024

What patients said (1,268 patients answered, 26% of those asked)

Patient survey stars by topic at Stanford Health Care Tri-Valley
Cleanliness3
Nurse communication3
Doctor communication4
Communication about medicines3
Discharge information4
Overall hospital rating3
Quietness2
Recommend hospital4
Share of patients giving the best answer at Stanford Health Care Tri-Valley
Room was "always" clean65%
Nurses "always" communicated well77%
Doctors "always" communicated well79%
Staff "always" explained58%
Yes, staff "did" give patients this information88%
Yes, staff "did" give patients information about help after discharge88%
Doctors "always" explained things so they could understand74%
Doctors "always" listened carefully78%
Doctors "always" treated them with courtesy and respect86%
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 night42%
"YES", patients would definitely recommend the hospital74%
Staff "always" explained possible side effects44%
Yes, staff "did" give patients information about possible symptoms89%

Original Medicare doctor bills

$12,734

Medicare paid this office $12,734 for 54 people.

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

Largest Original Medicare bills
Critical care, first 30-74 minutes23$8,165$186
New patient visit (60+ min)15$2,444$163

Who their Medicare patients are

54 Original Medicare patients in 2024. Average age 75 · Women 57% · Also on Medicaid 35% · Health risk score 2.37. Above the middle of the specialty; the typical pulmonary disease clinician is at 2.13.

Conditions among them: High blood pressure 75% · Diabetes 52% · Heart failure 48% · Coronary heart disease 44% · COPD 43% · Atrial fibrillation 43% · Chronic kidney disease 30% · Depression 22% · Cancer 20%.

The office billed $81,328, Medicare allowed $15,983 and paid $12,734; for 88 services of 12 kinds.

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

Professional record

NPI
1245735208
Trained
Temple University School of Medicine, 2018
Group
Stanford Health Care · University Healthcare Alliance
Video visits
Lists video visits
Gender
Male
More record details
Sole proprietor
No
Taxonomy
Federal specialty code 207RC0200X (207RC0200X); Internal medicine (207R00000X); Federal specialty code 207RP1001X (207RP1001X)
Mailing address
300 Pasteur Dr, Stanford, CA, 94305
NPI first listed
2018-03-29
NPI last updated
2024-07-29
NPI record certified
2024-07-29

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