Thanh M Khong, PA
Physician Assistant · Stanford
- Medicare standing
- 1 flag on the record
- Listed below.
- Plans that list them
- Not verified
- Not the same as out of network.
- Office
- 1
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 Thanh M Khong’s office at (650) 723-4000 to ask if they take your plan before you enroll.
California Medical Board record
Licence C51220 · Delinquent
Licence status: Delinquent · since 2003 · expires 2024-10-31 · Seoul National 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.
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 itOverall 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.
| Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths | 5.31 (4.24 to 6.37) · 8,661 cases | Worse | Jul 2022 – Jun 2024 |
| Rate of inpatient admissions for patients receiving outpatient chemotherapyUnplanned return visits | 14.1 (12.7 to 15.7) · 2,191 cases | Worse | Jan 2024 – Dec 2024 |
| Postoperative respiratory failure rateComplications and deaths | 4.08 (1.95 to 6.21) · 5,296 cases | Better | Jul 2022 – Jun 2024 |
| Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections | 0.317 | Better | Oct 2024 – Sep 2025 |
| Clostridium Difficile (C.Diff)Infections | 0.446 | Better | Oct 2024 – Sep 2025 |
| SSI - Colon SurgeryInfections | 0.241 | Better | Oct 2024 – Sep 2025 |
| Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits | 0.7 (0.6 to 0.9) · 3,348 cases | Better | Jan 2024 – Dec 2024 |
| Abdominopelvic accidental puncture or laceration rateComplications and deaths | 1.06 (0.45 to 1.67) · 5,374 cases | No different | Jul 2022 – Jun 2024 |
| CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths | 0.86 (0.72 to 1) | No different | Jul 2022 – Jun 2024 |
| Death rate among surgical inpatients with serious treatable complicationsComplications and deaths | 166.09 (137.88 to 194.3) · 470 cases | No different | Jul 2022 – Jun 2024 |
| Death rate for CABG surgery patientsComplications and deaths | 1.1 · 192 cases | None | Jul 2022 – Jun 2025 |
| Death rate for COPD patientsComplications and deaths | 6.4 · 146 cases | None | Jul 2022 – Jun 2025 |
| Death rate for heart attack patientsComplications and deaths | 9.7 · 253 cases | None | Jul 2022 – Jun 2025 |
| Death rate for heart failure patientsComplications and deaths | 6.3 · 880 cases | None | Jul 2022 – Jun 2025 |
| Death rate for pneumonia patientsComplications and deaths | 10.3 · 935 cases | None | Jul 2022 – Jun 2025 |
| Death rate for stroke patientsComplications and deaths | 8.7 · 501 cases | None | Jul 2023 – Jun 2025 |
| Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths | 2.1 · 7,730 cases | None | Jul 2024 – Jun 2025 |
| Iatrogenic pneumothorax rateComplications and deaths | 0.13 (0 to 0.27) · 20,799 cases | No different | Jul 2022 – Jun 2024 |
| In-hospital fall-associated fracture rateComplications and deaths | 0.28 (0.14 to 0.43) · 23,182 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative acute kidney injury requiring dialysis rateComplications and deaths | 0.94 (0.2 to 1.68) · 5,694 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative hemorrhage or hematoma rateComplications and deaths | 2.36 (1.54 to 3.19) · 7,846 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative sepsis rateComplications and deaths | 5.2 (3.76 to 6.64) · 5,603 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative wound dehiscence rateComplications and deaths | 1.38 (0.23 to 2.53) · 2,211 cases | No different | Jul 2022 – Jun 2024 |
| Pressure ulcer rateComplications and deaths | 0.52 (0.21 to 0.83) · 19,915 cases | No different | Jul 2022 – Jun 2024 |
| Rate of complications for hip/knee replacement patientsComplications and deaths | 3.6 · 416 cases | None | Apr 2023 – Mar 2025 |
| Central Line Associated Bloodstream Infection (ICU + select Wards)Infections | 0.869 | No different | Oct 2024 – Sep 2025 |
| MRSA BacteremiaInfections | 0.857 | No different | Oct 2024 – Sep 2025 |
| SSI - Abdominal HysterectomyInfections | 0.368 | No different | Oct 2024 – Sep 2025 |
| Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits | 16.2 · 247 cases | None | Jul 2023 – Jun 2025 |
| Heart failure (HF) 30-Day Readmission RateUnplanned return visits | 20.5 · 1,021 cases | None | Jul 2023 – Jun 2025 |
| Hospital return days for heart attack patientsUnplanned return visits | 47.8 · 258 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for heart failure patientsUnplanned return visits | -1.6 · 990 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for pneumonia patientsUnplanned return visits | 20.8 · 976 cases | None | Jul 2022 – Jun 2025 |
| Pneumonia (PN) 30-Day Readmission RateUnplanned return visits | 16.5 · 959 cases | None | Jul 2023 – Jun 2025 |
| Rate of emergency department (ED) visits for patients receiving outpatient chemotherapyUnplanned return visits | 5.2 (4.4 to 6.2) · 2,191 cases | No different | Jan 2024 – Dec 2024 |
| Rate of readmission after hip/knee replacementUnplanned return visits | 5.1 · 425 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for CABGUnplanned return visits | 9.6 · 158 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits | 19.6 · 183 cases | None | Jul 2023 – Jun 2025 |
| Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits | 12.7 (10.4 to 15.4) · 4,578 cases | No different | Jan 2022 – Dec 2024 |
What patients said (6,810 patients answered, 25% of those asked)
| Cleanliness | 4 |
| Nurse communication | 4 |
| Doctor communication | 4 |
| Communication about medicines | 3 |
| Discharge information | 4 |
| Overall hospital rating | 4 |
| Quietness | 2 |
| Recommend hospital | 5 |
| Room was "always" clean | 75% |
| Nurses "always" communicated well | 82% |
| Doctors "always" communicated well | 81% |
| Staff "always" explained | 63% |
| Yes, staff "did" give patients this information | 89% |
| Yes, staff "did" give patients information about help after discharge | 89% |
| Doctors "always" explained things so they could understand | 76% |
| Doctors "always" listened carefully | 80% |
| Doctors "always" treated them with courtesy and respect | 87% |
| Patients who gave a rating of "9" or "10" (high) | 79% |
| Staff "always" explained new medications | 76% |
| Nurses "always" explained things so they could understand | 77% |
| Nurses "always" listened carefully | 79% |
| Nurses "always" treated them with courtesy and respect | 88% |
| "Always" quiet at night | 53% |
| "YES", patients would definitely recommend the hospital | 83% |
| Staff "always" explained possible side effects | 50% |
| Yes, staff "did" give patients information about possible symptoms | 90% |
Original Medicare doctor bills
$12,567
Medicare paid this office $12,567 for 199 people.
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
| Short return visit (20+ min) | 85 | $6,129 | $68 |
| Short return visit (20+ min) | 73 | $3,540 | $47 |
| New patient visit (30+ min) | 11 | $696 | $63 |
| New patient visit (15+ min) | 11 | $563 | $51 |
Procedures Medicare counted
| Removal of nail tissue | 1-10 | None |
Who their Medicare patients are
199 Original Medicare patients in 2024. Average age 73 · Under 65 10% · 85 and older 16% · Women 62% · Also on Medicaid 25% · Health risk score 1.33. Above the middle of the specialty; the typical physician assistant clinician is at 1.31.
Conditions among them: High blood pressure 59% · Diabetes 22% · Depression 20% · Coronary heart disease 19% · Cancer 19% · Atrial fibrillation 18% · Chronic kidney disease 16% · Heart failure 12% · Dementia 12% · COPD 8% · Stroke 6%.
The office billed $67,948, Medicare allowed $17,580 and paid $12,567; for 213 services of 10 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
| 2024 | 199 | 213 | 73 | 1.33 | $67,948 | $12,567 |
| 2023 | 229 | 275 | 74 | 1.47 | $94,449 | $14,303 |
| 2022 | 229 | 284 | 74 | 1.28 | $84,756 | $14,738 |
| 2021 | 11 | 11 | 77 | 1.33 | $2,726 | $767 |
| 2020 | 29 | 30 | 73 | 1.72 | $12,332 | $1,008 |
| 2019 | 188 | 230 | 74 | 1.40 | $106,557 | $12,605 |
| 2018 | 205 | 252 | 73 | 1.50 | $83,183 | $12,246 |
| 2017 | 218 | 269 | 71 | 1.59 | $65,351 | $14,559 |
| 2016 | 207 | 377 | 69 | 2.01 | $98,799 | $18,071 |
| 2015 | 233 | 497 | 68 | 2.33 | $123,828 | $23,731 |
| 2014 | 113 | 188 | 66 | 1.61 | $51,421 | $9,922 |
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
| Short return visit (20+ min) | 80 | $5,274 | $64 |
| Short return visit (20+ min) | 92 | $4,261 | $46 |
| New patient visit (30+ min) | 15 | $982 | $65 |
| New patient visit (30+ min) | 18 | $930 | $52 |
| Telehealth originating site facility fee | 35 | $685 | $20 |
2022: 7 services
| Short return visit (20+ min) | 71 | $4,724 | $67 |
| Short return visit (20+ min) | 83 | $4,190 | $49 |
| Return visit (30+ min) | 19 | $1,346 | $71 |
| Return visit (30+ min) | 13 | $1,092 | $84 |
| New patient visit (30+ min) | 14 | $971 | $69 |
| Telehealth originating site facility fee | 41 | $837 | $20 |
| New patient visit (30+ min) | 12 | $612 | $51 |
2019: 4 services
| Return visit (30+ min) | 42 | $3,844 | $87 |
| Return visit (30+ min) | 51 | $3,192 | $60 |
| Short return visit (20+ min) | 52 | $2,393 | $45 |
| Short return visit (20+ min) | 27 | $919 | $34 |
2018: 4 services
| Return visit (30+ min) | 88 | $5,181 | $56 |
| Short return visit (20+ min) | 61 | $3,087 | $49 |
| New patient visit (30+ min) | 18 | $1,039 | $58 |
| Short return visit (20+ min) | 18 | $666 | $37 |
2017: 5 services
| Return visit (30+ min) | 112 | $7,447 | $65 |
| Short return visit (20+ min) | 42 | $1,910 | $44 |
| Emergency department visit with high level of medical decision making | 13 | $1,441 | $111 |
| New patient visit (30+ min) | 17 | $834 | $49 |
| Emergency department visit with low level of medical decision making | 16 | $544 | $34 |
2016: 5 services
| Emergency department visit with high level of medical decision making | 59 | $7,078 | $120 |
| Emergency department visit with moderate level of medical decision making | 57 | $4,589 | $81 |
| Emergency department visit with low level of medical decision making | 82 | $3,690 | $44 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 48 | $303 | $6 |
| X-ray of chest, 1 view, front | 29 | $204 | $7 |
2015: 5 services
| Emergency department visit with high level of medical decision making | 100 | $12,435 | $124 |
| Emergency department visit with moderate level of medical decision making | 61 | $5,239 | $83 |
| Emergency department visit with low level of medical decision making | 69 | $2,902 | $41 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 105 | $697 | $6 |
| X-ray of chest, 1 view, front | 75 | $520 | $7 |
2014: 4 services
| Emergency department visit with moderate level of medical decision making | 39 | $3,072 | $79 |
| Emergency department visit with low level of medical decision making | 50 | $2,207 | $44 |
| Emergency department visit with high level of medical decision making | 18 | $2,072 | $115 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 18 | $116 | $6 |
Medicaid work
$12,584 in 2021
Medicaid paid $12,584 for 381 billed services this clinician did in 2021, up to 39 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.
| 2019-ncov coronavirus, sars-cov-2/2019-ncov (covid-19), any technique, multiple types or subtypes (includes all targets), non-cdc, making use of high throughput technologies as described by cms-2020-01-r | 211 | $11,119 |
| Hospital outpatient clinic visit specimen collection for severe acute respiratory syndrome coronavirus 2 (sars-cov-2) (coronavirus disease [covid-19]), any specimen source | 138 | $1,466 |
| Infectious agent detection by nucleic acid (dna or rna); severe acute respiratory syndrome coronavirus 2 (sars-cov-2) (coronavirus disease [covid-19]), amplified probe technique, cdc or non-cdc, making use of high throughput technologies, completed within 2 calendar days from date of specimen collection (list separately in addition to either hcpcs code u0003 or u0004) as described by cms-2020-01-r2 | 32 | $0 |
| 2021 | 381 | 3 | 39 | $12,584 |
| 2020 | 186 | 2 | 52 | $13,551 |
See the largest Medicaid services in earlier years
2020
| 2019-ncov coronavirus, sars-cov-2/2019-ncov (covid-19), any technique, multiple types or subtypes (includes all targets), non-cdc, making use of high throughput technologies as described by cms-2020-01-r | 114 | $11,810 |
| Hospital outpatient clinic visit specimen collection for severe acute respiratory syndrome coronavirus 2 (sars-cov-2) (coronavirus disease [covid-19]), any specimen source | 72 | $1,741 |
Drugs they prescribed that Part D paid
$7,015
Pharmacies billed $7,015 in 2024.
This is pharmacy cost, not the office bill, and not what patients paid.
100 generic and 42 brand-name prescriptions · $7,015 in drug cost · 39 antibiotic prescriptions to 38 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.
| Paxlovid | 17 | $2,816 | $166 |
| Albuterol Sulfate Hfa | 12 | $249 | $21 |
| Amoxicillin-Clavulanate Potass | 18 | $95 | $5 |
Year by year
| 2024 | 142 | 107 | None | 30% | $7,015 |
| 2023 | 214 | 148 | None | 14% | $10,974 |
| 2022 | 187 | 129 | None | 9% | $6,143 |
| 2020 | 23 | 18 | 0% (0) | None | $506 |
| 2019 | 169 | 117 | None | None | $7,521 |
| 2018 | 172 | 117 | None | 15% | $4,099 |
| 2017 | 156 | 116 | 14% (22) | 13% | $3,323 |
| 2016 | 179 | 123 | 45% (81) | 7% | $1,759 |
| 2015 | 155 | 110 | 39% (60) | None | $2,389 |
| 2014 | 112 | 69 | 29% (32) | None | $1,264 |
Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.
See the drugs prescribed each year
2023: 5 drugs
| Albuterol Sulfate Hfa | 13 | $502 | $39 |
| Paxlovid (Eua) | 20 | $176 | $9 |
| Cephalexin | 15 | $139 | $9 |
| Mupirocin | 13 | $138 | $11 |
| Fluticasone Propionate | 11 | $97 | $9 |
2022: 3 drugs
| Diclofenac | 21 | $808 | $38 |
| Paxlovid (Eua) | 14 | $130 | $9 |
| Cephalexin | 17 | $103 | $6 |
2019: 2 drugs
| Diclofenac | 14 | $464 | $33 |
| Azithromycin | 12 | $83 | $7 |
2018: 3 drugs
| Diclofenac | 11 | $368 | $33 |
| Azithromycin | 15 | $86 | $6 |
| Cephalexin | 16 | $75 | $5 |
2017: 3 drugs
| Azithromycin | 21 | $140 | $7 |
| Ciprofloxacin | 11 | $79 | $7 |
| Acetaminophen-Codeine | 17 | $69 | $4 |
2016: 4 drugs
| Acetaminophen-Codeine | 36 | $181 | $5 |
| Hydrocodone-Acetaminophen | 24 | $161 | $7 |
| Cephalexin | 11 | $77 | $7 |
| Tramadol | 15 | $45 | $3 |
2015: 5 drugs
| Cephalexin | 17 | $123 | $7 |
| Hydrocodone-Acetaminophen | 18 | $120 | $7 |
| Acetaminophen-Codeine | 18 | $94 | $5 |
| Azithromycin | 13 | $93 | $7 |
| Tramadol | 22 | $59 | $3 |
2014: 3 drugs
| Hydrocodone-Acetaminophen | 20 | $111 | $6 |
| Cephalexin | 13 | $104 | $8 |
| Ibuprofen | 15 | $52 | $3 |
Money from drug and device companies
$15 in 2025
A payment is not proof that care is biased.
| AstraZeneca Pharmaceuticals LP | Wainua | $15 | 1 payment
|
See the published payment
| AstraZeneca Pharmaceuticals LP | Meals · 2025-08-08 | Wainua | $15 |
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
- 1669800231
- Licence
- CA 51220California C51220: Delinquent · expires 2024-10-31
- Group
- Stanford Health Care
- Video visits
- Lists video visits
- Gender
- Male
More record details
- Sole proprietor
- No
- Taxonomy
- Physician assistant (363A00000X); Physician assistant, medical (363AM0700X)
- Mailing address
- 300 Pasteur Dr Ste 100, Stanford, CA, 94305
- NPI first listed
- 2013-10-17
- 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.