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Nhi Yen Nguyen, MD

Internal Medicine · Stanford

NPI 1407318009

Medicare standing
Clear
Enrolled, allowed to bill and order, not excluded
Plans that list them
Not verified
Not the same as out of network.
Office
1
Since medical school
7 years
New York Medical College, 2019

Offices

1 location · Stanford Health Care · 3,152 clinicians in this group

Looking this up.

Hospitals listed: 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. Nguyen’s office at (650) 723-4000 to ask if they take your plan before you enroll.

California Medical Board record

Licence A176992 · Current

Licensed to practise in California · since 2022 · expires 2028-05-31 · New York Medical College.

No disciplinary actions, convictions, malpractice judgments or citations in this record.

Checkups this office reported

Medicare did not publish checkup rates for this clinician.

Medicare’s overall office score
76.5 / 100
Scores the office’s reporting and systems. It is not a grade for how the doctor treats you.

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.

  • 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 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

$90,586

Medicare paid this office $90,586 for 372 people.

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

Largest Original Medicare bills
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes153$36,690$104
Initial hospital care with moderate level of medical decision making at least 75 minutes128$19,282$147
Hospital discharge day management, more than 30 minutes174$18,462$101
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes107$13,019$69

Who their Medicare patients are

372 Original Medicare patients in 2024. Average age 77 · Under 65 9% · 85 and older 26% · Women 55% · Also on Medicaid 35% · Health risk score 2.43. Above the middle of the specialty; the typical internal medicine clinician is at 1.76.

Conditions among them: High blood pressure 75% · Chronic kidney disease 70% · Coronary heart disease 53% · Heart failure 44% · Diabetes 42% · Atrial fibrillation 40% · Depression 33% · Cancer 29% · COPD 29% · Dementia 27% · Stroke 20%.

The office billed $397,300, Medicare allowed $115,771 and paid $90,586; for 882 services of 9 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.

Year by year

Original Medicare by year
2024372882772.43$397,300$90,586
2023344832782.38$339,292$79,451
2022136307752.63$135,569$31,306

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: 5 services

Original Medicare services billed in 2023
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes94$22,231$105
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes132$20,609$68
Hospital discharge day management, more than 30 minutes167$17,232$100
Initial hospital care with moderate level of medical decision making at least 75 minutes105$15,283$146
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes22$2,433$111

2022: 5 services

Original Medicare services billed in 2022
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes72$14,240$89
Initial hospital care with moderate level of medical decision making at least 75 minutes34$5,938$175
Hospital discharge day management, more than 30 minutes41$3,845$94
Initial hospital observation care per day, typically 70 minutes23$3,670$160
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes13$1,436$60

Medicaid work

$4,008 in 2024

Medicaid paid $4,008 for 102 billed services this clinician did in 2024, up to 16 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
SBSQ HOSPITAL IP/OBS CARE HIGH MDM 50 MINUTES77$2,676
Hospital inpatient or observation discharge day management; more than 30 minutes on the date of the encounter25$1,333
Medicaid work by year
2024102216$4,008
202312112$650
See the largest Medicaid services in earlier years

2023

Largest Medicaid services in 2023
1ST HOSP IP/OBS HIGH 7512$650

Drugs they prescribed that Part D paid

$11,013

Pharmacies billed $11,013 in 2024.

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

Opioids were 10% of their Part D prescriptions (23 of 223) in 2024. A higher opioid share than 9 in 10 peers; the typical internal medicine clinician is at 1%.

205 generic and fewer than 11 brand-name prescriptions · $11,013 in drug cost · 40 antibiotic prescriptions to 28 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
Oxycodone21$107$5
Prednisone11$36$3

Year by year

Part D prescribing by year
202422311410% (23)None$11,013
20231707810% (17)None$14,046
20227634NoneNone$3,425

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

Money from drug and device companies

$19 in 2025

Industry payments by year
202511None$19
202212None$34

Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.

A payment is not proof that care is biased.

Payments by company
AstraZeneca Pharmaceuticals LPImfinzi$19
1 payment
  • Meals for Imfinzi · 2025-05-02 · $19
See the published payment
Every published payment
AstraZeneca Pharmaceuticals LPMeals · 2025-05-02Imfinzi$19
See earlier years (2022)

2022: $34

Payments by company in 2022
AstraZeneca Pharmaceuticals LPImfinzi$34
2 payments
  • Meals for Imfinzi · 2022-08-30 · $16
  • Meals for Imfinzi · 2022-08-04 · $17

Professional record

NPI
1407318009
Licence
CA A176992California A176992: Current · expires 2028-05-31
Trained
New York Medical College, 2019 · 7 years ago
Gender
Female
More record details
Sole proprietor
No
Taxonomy
Internal medicine (207R00000X)
Mailing address
300 Pasteur Dr, Stanford, CA, 94305
NPI first listed
2019-04-02
NPI last updated
2024-04-22
NPI record certified
2024-04-22

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

Extra NPI addresses: 2351 Clay St Ste 380, San Francisco, CA, 94115