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Zoe Chan, PA

Physician Assistant · Stanford

NPI 1942678818

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

Offices

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

Looking this up.

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

California Medical Board record

Licence A52717 · Current

Licensed to practise in California · since 1994 · expires 2028-01-31 · University of Texas Medical School at Houston.

Matched on the licence number without its letter prefix; check the name before relying on it.

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

Hospitals they work in

2 hospitals

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

  • 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 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

$12,860

Medicare paid this office $12,860 for 179 people.

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

Largest Original Medicare bills
New patient visit (30+ min)37$3,329$90
Short return visit (20+ min)32$2,310$70
New patient visit (30+ min)34$2,056$60
Short return visit (20+ min)32$1,614$50
Short return visit28$1,383$48
See all 6 services
Every Original Medicare service billed
New patient visit (30+ min)37$3,329$90
Short return visit (20+ min)32$2,310$70
New patient visit (30+ min)34$2,056$60
Short return visit (20+ min)32$1,614$50
Short return visit28$1,383$48
Short return visit13$324$25

Who their Medicare patients are

179 Original Medicare patients in 2024. Average age 74 · Women 41% · Also on Medicaid 21% · Health risk score 1.77. Above the middle of the specialty; the typical physician assistant clinician is at 1.31.

Conditions among them: High blood pressure 75% · Atrial fibrillation 70% · Coronary heart disease 60% · Heart failure 55% · Chronic kidney disease 53% · Diabetes 35% · COPD 23% · Depression 21% · Stroke 21% · Cancer 17% · Dementia 7%.

The office billed $98,613, Medicare allowed $16,540 and paid $12,860; for 195 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
2024179195741.77$98,613$12,860
20232930752.95$9,373$1,969
20226669731.63$31,761$5,119
20218186732.15$38,399$9,526
20192225751.63$6,133$1,405
20182939752.11$9,178$2,006

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: 1 service

Original Medicare services billed in 2023
Short return visit (20+ min)11$570$52

2022: 3 services

Original Medicare services billed in 2022
New patient visit (45+ min)21$2,202$105
New patient visit (30+ min)15$964$64
Short return visit (20+ min)15$766$51

2021: 2 services

Original Medicare services billed in 2021
New patient visit (60+ min)51$7,452$146
Short return visit (20+ min)22$1,150$48

2019: 1 service

Original Medicare services billed in 2019
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes20$1,263$55

2018: 1 service

Original Medicare services billed in 2018
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes23$1,778$56

Money from drug and device companies

$1,728 in 2025

Industry payments by year
2025416None$1,728
202422None$245
202324None$315
202212None$134
202113None$125

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
AtriCureAtricure Cryoice Cryosphere Cryoablation System$777
6 payments
  • Meals for Atriclip Laa Exclusion System · 2025-12-10 · $230
  • Meals for Atricure Cryoice Cryosphere Cryoablation System · 2025-07-24 · $11
  • Meals for Atricure Cryoice Cryosphere Cryoablation System · 2025-07-09 · $19
  • Meals for Atricure Cryoice Cryosphere Cryoablation System · 2025-07-09 · $240
  • Meals for Atricure Cryoice Cryosphere Cryoablation System · 2025-05-21 · $23
  • Meals for Atricure Cryoice Cryosphere Cryoablation System · 2025-03-28 · $255
Edwards LifesciencesNone$639
7 payments
  • Meals · 2025-06-28 · $85
  • Meals · 2025-06-28 · $267
  • Meals · 2025-06-27 · $66
  • Meals · 2025-06-27 · $47
  • Meals · 2025-06-27 · $48
  • Meals · 2025-06-26 · $39
  • Meals · 2025-06-26 · $88
Getinge USA SalesVasoview Hemopro 2$286
2 payments
  • Meals for Vasoview Hemopro 2 · 2025-08-22 · $139
  • Meals for Vasoview Hemopro 2 · 2025-03-11 · $147
DavolProgel Applicator Spray Tips$26
1 payment
  • Meals for Progel Applicator Spray Tips · 2025-07-10 · $26
See all 16 published payments
Every published payment
AtriCureMeals · 2025-12-10Atriclip Laa Exclusion System$230
Getinge USA SalesMeals · 2025-08-22Vasoview Hemopro 2$139
AtriCureMeals · 2025-07-24Atricure Cryoice Cryosphere Cryoablation System$11
DavolMeals · 2025-07-10Progel Applicator Spray Tips$26
AtriCureMeals · 2025-07-09Atricure Cryoice Cryosphere Cryoablation System$19
AtriCureMeals · 2025-07-09Atricure Cryoice Cryosphere Cryoablation System$240
Edwards LifesciencesMeals · 2025-06-28None$85
Edwards LifesciencesMeals · 2025-06-28None$267
Edwards LifesciencesMeals · 2025-06-27None$66
Edwards LifesciencesMeals · 2025-06-27None$47
Edwards LifesciencesMeals · 2025-06-27None$48
Edwards LifesciencesMeals · 2025-06-26None$39
Edwards LifesciencesMeals · 2025-06-26None$88
AtriCureMeals · 2025-05-21Atricure Cryoice Cryosphere Cryoablation System$23
AtriCureMeals · 2025-03-28Atricure Cryoice Cryosphere Cryoablation System$255
Getinge USA SalesMeals · 2025-03-11Vasoview Hemopro 2$147
See earlier years (2024, 2023, 2022, 2021)

2024: $245

Payments by company in 2024
Edwards LifesciencesMitris Resilia Mitral Valve$124
1 payment
  • Meals for Mitris Resilia Mitral Valve · 2024-06-29 · $124
Baxter HealthcarePreveleak$121
1 payment
  • Meals for Preveleak · 2024-06-13 · $121

2023: $315

Payments by company in 2023
AtricureAtricure Cryoice Cryosphere Cryoablation System$223
2 payments
  • Meals for Synergy Ablation System · 2023-08-09 · $12
  • Meals for Atricure Cryoice Cryosphere Cryoablation System · 2023-01-19 · $211
Getinge USA SalesVasoview Hemopro 2$91
2 payments
  • Meals for Vasoview Hemopro 2 · 2023-05-02 · $26
  • Meals for Vasoview Hemopro 2 · 2023-05-02 · $66

2022: $134

Payments by company in 2022
AtriCureAtriclip Laa Exclusion System$134
2 payments
  • Meals for Atriclip Laa Exclusion System · 2022-09-08 · $119
  • Education for Synergy Ablation System · 2022-09-08 · $15

2021: $125

Payments by company in 2021
Getinge USA SalesVasoview Hemopro 2$125
3 payments
  • Meals for Acrobat-I Stabilizer · 2021-06-15 · $8
  • Meals for Vasoview Hemopro 2 · 2021-05-25 · $25
  • Meals for Vasoview Hemopro 2 · 2021-05-25 · $92

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.

Professional record

NPI
1942678818
Licence
CA 52717California A52717: Current · expires 2028-01-31
Video visits
Lists video visits
Gender
Female
More record details
Sole proprietor
No
Taxonomy
Physician assistant (363A00000X); Physician assistant, surgical (363AS0400X)
Mailing address
300 Pasteur Dr, Stanford, CA, 94305
NPI first listed
2015-09-09
NPI last updated
2025-12-23
NPI record certified
2025-12-23

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