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Zhi-Fang Tsun, PA

Physician Assistant · Stanford

NPI 1124506407

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. 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 Zhi-Fang Tsun’s office at (650) 723-4000 to ask if they take your plan before you enroll.

California Medical Board record

Licence C55690 · Cancelled

Licence status: Cancelled · since 2013 · Eastern Virginia Medical School.

License has been voluntarily canceled, or the license has been expired for at least five years and has not been renewed. No practice is permitted.

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

1 hospital

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
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%

Original Medicare doctor bills

$13,076

Medicare paid this office $13,076 for 155 people.

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

Largest Original Medicare bills
Return visit (30+ min)66$5,245$66
Short return visit (20+ min)61$3,426$50
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit14$1,856$133
Short return visit17$622$35
Telephone medical discussion with physician, 5-10 minutes13$475$37

Procedures Medicare counted

Procedure volume Medicare published
Removal of skin lesions1-10None

Who their Medicare patients are

155 Original Medicare patients in 2024. Average age 73 · Women 52% · Also on Medicaid 13% · Health risk score 1.03. At or below the middle of the specialty; the typical physician assistant clinician is at 1.31.

Conditions among them: High blood pressure 52% · Coronary heart disease 22% · Diabetes 16% · Cancer 14% · Atrial fibrillation 14% · Depression 12% · Heart failure 10% · Chronic kidney disease 10% · COPD 10%.

The office billed $62,675, Medicare allowed $18,634 and paid $13,076; for 215 services of 13 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
2024155215731.03$62,675$13,076
202385127751.21$39,319$9,289
202041161760.87$11,409$4,944
2019206827761.15$70,625$31,286
20183142761.03$12,077$4,914

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: 2 services

Original Medicare services billed in 2023
Return visit (30+ min)59$5,378$72
Short return visit (20+ min)16$798$50

2020: 1 service

Original Medicare services billed in 2020
Short return visit (20+ min)12$401$33

2019: 12 services

Original Medicare services billed in 2019
Short return visit (20+ min)98$6,364$54
Replacement of knee joint, both sides of knee33$5,494$166
Replacement of thigh bone and hip joint with prosthesis17$2,836$167
Repair of shoulder rotator cuff using an endoscope14$1,853$132
Aspiration and/or injection of fluid from large joint24$1,311$45
X-ray of knee, 1-2 views22$730$28
New patient visit (30+ min)12$672$56
Partial removal of collar bone at shoulder using an endoscope11$519$47
Shaving of part of shoulder bone and repair of ligament using an endoscope20$409$20
X-ray of hip, 1 view13$320$25
X-ray of pelvis, 1-2 views11$315$29
Injection, dexamethasone sodium phosphate, 1 mg41$27None

2018: 1 service

Original Medicare services billed in 2018
Replacement of knee joint, both sides of knee12$1,995$166

Drugs they prescribed that Part D paid

$46,085

Pharmacies billed $46,085 in 2024.

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

339 generic and fewer than 11 brand-name prescriptions · $46,085 in drug cost · 29 antibiotic prescriptions to 18 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
Rosuvastatin21$378$18
Gabapentin18$280$16
Finasteride11$208$19
Metformin Hcl Er15$176$12
Atorvastatin15$167$11
See all 6 drugs
Every Part D drug this clinician prescribed
Rosuvastatin21$378$18
Gabapentin18$280$16
Finasteride11$208$19
Metformin Hcl Er15$176$12
Atorvastatin15$167$11
Losartan18$158$9

Year by year

Part D prescribing by year
202438182NoneNone$46,085
202322077NoneNone$33,447
2022118290% (0)None$15,045
2021286460% (0)None$28,909
20202147229% (63)13%$5,277
201943316639% (170)7%$5,428
201814NoneNoneNone$300

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

See the drugs prescribed each year

2023: 4 drugs

Part D drugs prescribed in 2023
Atorvastatin20$361$18
Amlodipine Besylate14$213$15
Metformin14$166$12
Losartan11$158$14

2022: 2 drugs

Part D drugs prescribed in 2022
Metformin23$134$6
Atorvastatin14$123$9

2021: 8 drugs

Part D drugs prescribed in 2021
Trulicity17$17,008$1,000
Atorvastatin26$228$9
Levothyroxine11$168$15
Metformin29$132$5
Losartan18$103$6
Amlodipine Besylate22$89$4
Lisinopril14$80$6
Glipizide12$62$5

2020: 6 drugs

Part D drugs prescribed in 2020
Celecoxib19$619$33
Hydrocodone-Acetaminophen41$313$8
Tranexamic Acid15$142$9
Ibuprofen19$141$7
Oxycodone-Acetaminophen11$124$11
Meloxicam14$108$8

2019: 8 drugs

Part D drugs prescribed in 2019
Hydrocodone-Acetaminophen110$864$8
Ibuprofen69$727$11
Celecoxib22$482$22
Diclofenac11$482$44
Tranexamic Acid45$446$10
Meloxicam69$430$6
Oxycodone-Acetaminophen20$285$14
Acetaminophen-Codeine27$199$7

Money from drug and device companies

$15 in 2025

Industry payments by year
202511None$15
202411None$15
202311None$14
202211None$14
202137None$226

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
Hologic Sales and ServiceAptima$15
1 payment
  • Meals for Aptima · 2025-05-15 · $15
See the published payment
Every published payment
Hologic Sales and ServiceMeals · 2025-05-15Aptima$15
See earlier years (2024, 2023, 2022, 2021)

2024: $15

Payments by company in 2024
GlaxoSmithKlineShingrix$15
1 payment
  • Meals for Shingrix · 2024-09-03 · $15

2023: $14

Payments by company in 2023
GlaxoSmithKlineRotarix$14
1 payment
  • Meals for Rotarix · 2023-12-05 · $14

2022: $14

Payments by company in 2022
Novo NordiskOzempic$14
1 payment
  • Meals for Ozempic · 2022-12-14 · $14

2021: $226

Payments by company in 2021
Novo NordiskRybelsus$175
4 payments
  • Meals for Ozempic · 2021-11-02 · $19
  • Meals for Rybelsus · 2021-10-15 · $24
  • Meals for Ozempic · 2021-07-19 · $18
  • Meals for Rybelsus · 2021-06-30 · $114
Dynavax TechnologiesHeplisav-B$32
2 payments
  • Meals for Heplisav-B · 2021-11-16 · $12
  • Meals for Heplisav-B · 2021-08-31 · $20
GlaxoSmithKlineShingrix$18
1 payment
  • Meals for Shingrix · 2021-09-13 · $18

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
1124506407
Licence
CA 55690California C55690: Cancelled
Video visits
Lists video visits
Gender
Female
More record details
Sole proprietor
No
Taxonomy
Physician assistant (363A00000X); Physician assistant, medical (363AM0700X)
Mailing address
300 Pasteur Dr, Stanford, CA, 94305
NPI first listed
2018-07-30
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.