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Constance Huynh, PA

Physician Assistant · Stanford

NPI 1528343555

Medicare standing
1 flag on the record
Listed below.
Plans that list them
Not verified
Not the same as out of network.
Office
1
Since medical school
15 years
Graduated 2011

On the public record

  • California licence: Delinquent

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

California Medical Board record

Licence G58551 · Delinquent

Licence status: Delinquent · since 1986 · expires 2026-07-31 · Ohio State University College of Medicine.

License renewal fee has not been paid. 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.

State licence records

1 licence

  • Washington PA.PA.60198953Physician Assistant License · since 2011 · expires 2026-09-07
    ExpiredNo board action on this licenceCheck it with the state

We check Colorado, Delaware, Florida, Illinois, Maryland, New Jersey, New York, Tennessee, Texas, Virginia, Washington, plus California above. A state that is not in this list has not been checked, which is not the same as clear.

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

$13,756

Medicare paid this office $13,756 for 115 people.

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

Largest Original Medicare bills
Return visit (30+ min)54$5,072$66
Return visit (30+ min)35$4,876$102
Short return visit (20+ min)27$2,065$67

Who their Medicare patients are

115 Original Medicare patients in 2024. Average age 73 · Women 71% · Also on Medicaid 24% · Health risk score 1.18. At or below the middle of the specialty; the typical physician assistant clinician is at 1.31.

Conditions among them: High blood pressure 61% · Diabetes 32% · Chronic kidney disease 21% · Depression 20% · Coronary heart disease 17% · Atrial fibrillation 16% · Cancer 15% · Heart failure 12% · COPD 10%.

The office billed $76,132, Medicare allowed $18,985 and paid $13,756; for 190 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.

Year by year

Original Medicare by year
2024115190731.18$76,132$13,756
20222856740.86$19,729$4,911
20213652731.41$18,013$4,542
20131423721.61$3,539$602

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

2022: 1 service

Original Medicare services billed in 2022
Return visit (30+ min)12$2,588$100

2021: 1 service

Original Medicare services billed in 2021
New patient visit (45+ min)12$1,704$142

Medicaid work

$2,059 in 2021

Medicaid paid $2,059 for 35 billed services this clinician did in 2021, up to 21 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 2021
New patient visit (30+ min)35$2,059
Medicaid work by year
202135121$2,059

Drugs they prescribed that Part D paid

$27,926

Pharmacies billed $27,926 in 2024.

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

139 generic and 16 brand-name prescriptions · $27,926 in drug cost · 11 antibiotic prescriptions.

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
Prednisone11$53$5

Year by year

Part D prescribing by year
202415553None10%$27,926
202336NoneNoneNone$6,155
202212126None17%$16,070
20212613NoneNone$4,451
202024242None14%$12,377
2019691954% (29)None$28,661
20186581224% (29)None$32,048
20176641495% (35)None$26,468
20161,0441895% (48)15%$31,691
20151,4222177% (96)17%$42,985
20141,0191888% (78)19%$57,662
201336815413% (46)None$8,227

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

See the drugs prescribed each year

2022: 1 drug

Part D drugs prescribed in 2022
Amlodipine Besylate13$110$8

2020: 4 drugs

Part D drugs prescribed in 2020
Atorvastatin17$247$15
Amlodipine Besylate22$246$11
Lisinopril20$244$12
Omeprazole12$213$18

2019: 15 drugs

Part D drugs prescribed in 2019
Alvesco14$1,207$86
Diclofenac15$761$51
Atorvastatin28$666$24
Levothyroxine28$626$22
Lisinopril44$499$11
Amlodipine Besylate44$461$10
Omeprazole21$295$14
Metformin26$278$11
Hydrochlorothiazide27$259$10
Trazodone15$175$12
Losartan14$174$12
Simvastatin13$130$10
Metformin Hcl Er11$125$11
Atenolol11$121$11
Alendronate11$110$10

2018: 16 drugs

Part D drugs prescribed in 2018
Qvar12$2,040$170
Ventolin Hfa11$1,246$113
Diclofenac16$736$46
Atorvastatin25$653$26
Levothyroxine24$531$22
K-Tab Er11$391$36
Amlodipine Besylate39$372$10
Lisinopril39$340$9
Metformin28$271$10
Simvastatin21$243$12
Omeprazole17$236$14
Losartan14$196$14
Alendronate12$154$13
Sertraline15$153$10
Hydrochlorothiazide22$147$7
Citalopram Hbr13$102$8

2017: 16 drugs

Part D drugs prescribed in 2017
Ventolin Hfa16$1,899$119
Qvar14$1,855$133
K-Tab Er14$688$49
Levothyroxine24$563$23
Atorvastatin19$515$27
Gabapentin16$442$28
Lisinopril36$324$9
Amlodipine Besylate34$276$8
Simvastatin24$261$11
Metformin32$243$8
Omeprazole17$221$13
Losartan17$200$12
Hydrocodone-Acetaminophen16$172$11
Alendronate12$92$8
Atenolol17$70$4
Lorazepam14$37$3

2016: 27 drugs

Part D drugs prescribed in 2016
Qvar19$2,690$142
Ventolin Hfa12$1,263$105
Proair Hfa13$1,084$83
Levothyroxine46$930$20
Risedronate11$873$79
K-Tab Er17$778$46
Simvastatin56$772$14
Lisinopril74$742$10
Metformin49$597$12
Omeprazole37$456$12
Fluticasone Propionate26$397$15
Atorvastatin20$321$16
Amlodipine Besylate33$321$10
Gabapentin11$318$29
Atenolol37$307$8
Glimepiride14$304$22
Losartan26$272$10
Hydrocodone-Acetaminophen18$228$13
Trazodone24$225$9
Lisinopril-Hydrochlorothiazide19$196$10
Metoprolol15$194$13
Potassium Chloride12$175$15
Montelukast13$117$9
Hydrochlorothiazide20$92$5
Fluoxetine12$71$6
Lorazepam15$68$5
Promethazine11$49$4

2015: 34 drugs

Part D drugs prescribed in 2015
Lyrica11$5,046$459
Humulin N27$2,277$84
Proair Hfa19$1,588$84
Oxybutynin Chloride15$1,314$88
K-Tab Er27$1,203$45
Levothyroxine54$1,072$20
Lisinopril98$786$8
Metoprolol28$729$26
Hydrocodone-Acetaminophen31$693$22
Metformin62$656$11
Omeprazole55$621$11
Simvastatin88$560$6
Gabapentin19$532$28
Atorvastatin24$497$21
Oxycodone14$490$35
Nortriptyline26$476$18
Atenolol59$459$8
Losartan43$452$11
Labetalol11$414$38
Amlodipine Besylate55$372$7
Acetaminophen-Codeine25$361$14
Metoprolol35$353$10
Glimepiride11$313$28
Allopurinol12$212$18
Lisinopril-Hydrochlorothiazide27$211$8
Trazodone29$204$7
Potassium Chloride12$193$16
Citalopram Hbr20$168$8
Hydrochlorothiazide28$167$6
Alendronate15$146$10
Sertraline16$138$9
Ciprofloxacin14$78$6
Single Use Swab11$77$7
Furosemide12$59$5

2014: 29 drugs

Part D drugs prescribed in 2014
Proair Hfa30$1,722$57
Levothyroxine41$763$19
Metoprolol17$715$42
K-Tab Er17$706$42
Humulin N13$675$52
Gabapentin25$592$24
Hydrocodone-Acetaminophen33$558$17
Omeprazole42$499$12
Lisinopril49$418$9
Losartan28$374$13
Metformin30$373$12
Atenolol38$245$6
Amlodipine Besylate34$228$7
Nortriptyline12$217$18
Ranitidine17$193$11
Simvastatin29$192$7
Atorvastatin11$183$17
Metoprolol22$177$8
Trazodone26$165$6
Allopurinol13$152$12
Acetaminophen-Codeine12$109$9
Temazepam11$97$9
Triamcinolone Acetonide11$90$8
Hydrochlorothiazide15$85$6
Citalopram Hbr11$83$8
Ciprofloxacin17$80$5
Sertraline11$75$7
Furosemide13$58$4
Lorazepam11$48$4

2013: 10 drugs

Part D drugs prescribed in 2013
Proair Hfa17$809$48
Hydrocodone-Acetaminophen24$448$19
Fluticasone Propionate14$238$17
Levothyroxine18$234$13
Pramipexole Dihydrochloride11$129$12
Simvastatin15$100$7
Ranitidine15$100$7
Azithromycin11$87$8
Sertraline12$80$7
Ciprofloxacin11$54$5

Money from drug and device companies

$21 in 2024

Industry payments by year
202411None$21
2022320$3,168$3,693
202125None$82

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
MedtronicHarmony$21
1 payment
  • Meals for Harmony · 2024-04-29 · $21
See the published payment
Every published payment
MedtronicMeals · 2024-04-29Harmony$21
See earlier years (2022, 2021)

2022: $3,693

Payments by company in 2022
OrganonNexplanon$3,458
14 payments
  • Paid to speak or teach for Nexplanon · 2022-10-03 · $1,045
  • Paid to speak or teach for Nexplanon · 2022-10-03 · $1,045
  • Meals for Nexplanon · 2022-09-27 · $25
  • Meals · 2022-09-26 · $8
  • Paid to speak or teach for Nexplanon · 2022-06-06 · $1,045
  • Paid to speak or teach for Nexplanon · 2022-06-06 · $26
  • Paid to speak or teach for Nexplanon · 2022-06-06 · $7
  • Meals · 2022-05-14 · $42
  • Meals for Nexplanon · 2022-05-14 · $63
  • Meals for Nexplanon · 2022-05-14 · $63
  • Meals · 2022-04-25 · $23
  • Meals · 2022-03-25 · $22
  • Meals · 2022-02-25 · $18
  • Meals for Nexplanon · 2022-01-25 · $25
Novo NordiskRybelsus$149
2 payments
  • Meals for Ozempic · 2022-04-02 · $24
  • Meals for Rybelsus · 2022-02-16 · $125
AbbvieQulipta$86
4 payments
  • Meals for Qulipta · 2022-11-02 · $22
  • Meals for Qulipta · 2022-07-12 · $24
  • Meals for Qulipta · 2022-05-21 · $15
  • Meals for Qulipta · 2022-05-20 · $25

2021: $82

Payments by company in 2021
OrganonNexplanon$45
3 payments
  • Meals for Nexplanon · 2021-10-29 · $22
  • Meals for Nexplanon · 2021-09-28 · $20
  • Meals for Nexplanon · 2021-09-28 · $3
Novo NordiskRybelsus$37
2 payments
  • Meals for Rybelsus · 2021-12-20 · $17
  • Meals for Rybelsus · 2021-10-15 · $20

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
1528343555
Licence
CA 58551, WA PA60198953California G58551: Delinquent · expires 2026-07-31Washington PA.PA.60198953: Expired
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
2011-10-21
NPI last updated
2025-12-19
NPI record certified
2025-12-19

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

Extra NPI addresses: 747 52nd St, Oakland, CA, 94609

This office lists an electronic records connection.