Haydn Hok Sham Leung, MD
Emergency Medicine · Santa Clara
- Medicare standing
- Clear
- Enrolled, allowed to bill and order, not excluded
- Plans that list them
- Not verified
- Not the same as out of network.
- Offices
- 2
Offices
2 locations · Permanente Medical Group Inc · 10,928 clinicians in this group
Hospitals listed: Kaiser Foundation Hospital-Santa Clara. 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. Leung’s office at (408) 851-1000 to ask if they take your plan before you enroll.
California Medical Board record
Licence A79890 · Current
Licensed to practise in California · since 2002 · expires 2028-06-30 · University of Hawaii School of Medicine.
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.
- Kaiser Foundation Hospital-Santa ClaraSanta Clara, CAAcute Care Hospital · Voluntary non-profit - Private · Has an emergency department · Birthing-friendlyPart of Kaiser Permanente, which runs 41 hospitals in 3 statesPatients rate it 3 of 5 · 75% would definitely recommend itOverall rating: 2 of 5 starsBetter than the national rate — Clostridium Difficile (C.Diff): 0.38, Oct 2024 – Sep 2025
See every measure and the patient survey for Kaiser Foundation Hospital-Santa Clara
Behind the star rating — Deaths: 0 better, 3 the same, 0 worse of 3 measures. Safety: 2 better, 4 the same, 0 worse of 6 measures. Readmissions: 0 better, 1 the same, 1 worse of 2 measures. The star rating is worked out from an earlier period than the measures below, so the two can disagree.
| Clostridium Difficile (C.Diff)Infections | 0.38 | Better | Oct 2024 – Sep 2025 |
| Abdominopelvic accidental puncture or laceration rateComplications and deaths | 1.01 (0 to 2.09) · 181 cases | No different | Jul 2022 – Jun 2024 |
| CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths | 1.02 (0.61 to 1.42) | No different | Jul 2022 – Jun 2024 |
| Death rate for stroke patientsComplications and deaths | 10.5 · 312 cases | None | Jul 2023 – Jun 2025 |
| Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths | 3.8 · 3,736 cases | None | Jul 2024 – Jun 2025 |
| Iatrogenic pneumothorax rateComplications and deaths | 0.2 (0 to 0.43) · 910 cases | No different | Jul 2022 – Jun 2024 |
| In-hospital fall-associated fracture rateComplications and deaths | 0.26 (0.05 to 0.48) · 1,036 cases | No different | Jul 2022 – Jun 2024 |
| Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths | 4.53 (2.03 to 7.03) · 235 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative acute kidney injury requiring dialysis rateComplications and deaths | 1.57 (0 to 3.25) · 83 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative hemorrhage or hematoma rateComplications and deaths | 2.5 (0.82 to 4.18) · 178 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative respiratory failure rateComplications and deaths | 11.73 (3.81 to 19.64) · 74 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative sepsis rateComplications and deaths | 5.31 (1.3 to 9.32) · 94 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative wound dehiscence rateComplications and deaths | 1.75 (0.22 to 3.28) · 37 cases | No different | Jul 2022 – Jun 2024 |
| Pressure ulcer rateComplications and deaths | 0.34 (0 to 1.34) · 819 cases | No different | Jul 2022 – Jun 2024 |
| Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections | 0.72 | No different | Oct 2024 – Sep 2025 |
| Central Line Associated Bloodstream Infection (ICU + select Wards)Infections | 1.049 | No different | Oct 2024 – Sep 2025 |
| MRSA BacteremiaInfections | 0.598 | No different | Oct 2024 – Sep 2025 |
| SSI - Colon SurgeryInfections | 0.926 | No different | Oct 2024 – Sep 2025 |
| Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits | 13 · 589 cases | None | Jul 2023 – Jun 2025 |
| Heart failure (HF) 30-Day Readmission RateUnplanned return visits | 20.7 · 828 cases | None | Jul 2023 – Jun 2025 |
| Hospital return days for heart failure patientsUnplanned return visits | 107.6 · 27 cases | None | Jul 2022 – Jun 2025 |
| Pneumonia (PN) 30-Day Readmission RateUnplanned return visits | 17.9 · 642 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for CABGUnplanned return visits | 7.8 · 249 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits | 20.6 · 181 cases | None | Jul 2023 – Jun 2025 |
What patients said (572 patients answered, 25% of those asked)
| Cleanliness | 4 |
| Nurse communication | 3 |
| Doctor communication | 4 |
| Communication about medicines | 2 |
| Discharge information | 4 |
| Overall hospital rating | 3 |
| Quietness | 2 |
| Recommend hospital | 4 |
| Room was "always" clean | 72% |
| Nurses "always" communicated well | 75% |
| Doctors "always" communicated well | 80% |
| Staff "always" explained | 57% |
| Yes, staff "did" give patients this information | 88% |
| Yes, staff "did" give patients information about help after discharge | 88% |
| Doctors "always" explained things so they could understand | 74% |
| Doctors "always" listened carefully | 79% |
| Doctors "always" treated them with courtesy and respect | 87% |
| Patients who gave a rating of "9" or "10" (high) | 70% |
| Staff "always" explained new medications | 72% |
| Nurses "always" explained things so they could understand | 72% |
| Nurses "always" listened carefully | 71% |
| Nurses "always" treated them with courtesy and respect | 82% |
| "Always" quiet at night | 44% |
| "YES", patients would definitely recommend the hospital | 75% |
| Staff "always" explained possible side effects | 42% |
| Yes, staff "did" give patients information about possible symptoms | 89% |
Original Medicare doctor bills
$1,331
Medicare paid this office $1,331 for 18 people.
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
| Emergency department visit with moderate level of medical decision making | 12 | $1,127 | $94 |
Who their Medicare patients are
18 Original Medicare patients in 2024. Average age 71 · Health risk score 1.52. At or below the middle of the specialty; the typical emergency medicine clinician is at 2.01.
Conditions among them: High blood pressure 72%.
The office billed $8,870, Medicare allowed $1,875 and paid $1,331; for 19 services of 4 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 | 18 | 19 | 71 | 1.52 | $8,870 | $1,331 |
| 2023 | 35 | 38 | 71 | 1.90 | $18,485 | $2,832 |
| 2022 | 27 | 28 | 66 | 3.62 | $11,469 | $2,104 |
| 2021 | 33 | 36 | 68 | 2.40 | $14,851 | $2,758 |
| 2020 | 23 | 23 | 65 | 2.31 | $8,804 | $1,330 |
| 2019 | 35 | 37 | 72 | 2.97 | $14,752 | $2,835 |
| 2018 | 48 | 55 | 65 | 3.24 | $20,688 | $4,170 |
| 2017 | 53 | 57 | 68 | 2.54 | $17,100 | $3,252 |
| 2016 | 39 | 40 | 62 | 2.97 | $13,464 | $2,388 |
| 2015 | 22 | 22 | 67 | 2.02 | $7,777 | $1,432 |
| 2014 | 29 | 29 | 66 | 2.53 | $12,040 | $2,380 |
| 2013 | 26 | 27 | 73 | 1.89 | $13,950 | $2,336 |
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
| Emergency department visit with moderate level of medical decision making | 20 | $1,850 | $84 |
2022: 1 service
| Emergency department visit with moderate level of medical decision making | 14 | $1,407 | $100 |
2021: 1 service
| Emergency department visit with moderate level of medical decision making | 14 | $1,293 | $92 |
2019: 1 service
| Emergency department visit with moderate level of medical decision making | 14 | $1,315 | $94 |
2018: 1 service
| Emergency department visit with moderate level of medical decision making | 21 | $1,729 | $82 |
2017: 2 services
| Emergency department visit with moderate level of medical decision making | 20 | $1,873 | $85 |
| Emergency department visit for problem that may not require health care professional | 12 | $121 | $10 |
2016: 1 service
| Emergency department visit with moderate level of medical decision making | 22 | $1,582 | $72 |
2015: 1 service
| Emergency department visit with moderate level of medical decision making | 16 | $1,284 | $80 |
2014: 1 service
| Emergency department visit with moderate level of medical decision making | 25 | $2,255 | $90 |
2013: 2 services
| Emergency department visit with high level of medical decision making | 12 | $1,193 | $99 |
| Emergency department visit with moderate level of medical decision making | 12 | $1,057 | $88 |
Medicaid work
$20,660 in 2024
Medicaid paid $20,660 for 134 billed services this clinician did in 2024, up to 22 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.
| EMERGENCY DEPT VISIT MOD MDM | 134 | $20,660 |
| 2024 | 134 | 1 | 22 | $20,660 |
| 2023 | 129 | 2 | 18 | $900 |
| 2022 | 111 | 1 | 20 | $1,316 |
| 2021 | 46 | 1 | 17 | $303 |
| 2018 | 15 | 1 | 14 | $130 |
See the largest Medicaid services in earlier years
2023
| EMERGENCY DEPT VISIT MOD MDM | 101 | $875 |
| EMERGENCY DEPARTMENT VISIT STRAIGHTFORWARD MDM | 28 | $24 |
2022
| EMERGENCY DEPT VISIT MOD MDM | 111 | $1,316 |
2021
| EMERGENCY DEPT VISIT MOD MDM | 46 | $303 |
2018
| EMERGENCY DEPT VISIT MOD MDM | 15 | $130 |
Drugs they prescribed that Part D paid
$5,079
Pharmacies billed $5,079 in 2024.
This is pharmacy cost, not the office bill, and not what patients paid.
Opioids were 15% of their Part D prescriptions (26 of 174) in 2024. Above the middle of the specialty; the typical emergency medicine clinician is at 12%.
153 generic and 21 brand-name prescriptions · $5,079 in drug cost · 47 antibiotic prescriptions to 43 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.
| Cefpodoxime Proxetil | 12 | $415 | $32 |
| Albuterol Sulfate Hfa | 12 | $227 | $16 |
| Cephalexin | 14 | $161 | $11 |
| Oxycodone | 18 | $114 | $6 |
Year by year
| 2024 | 174 | 127 | 15% (26) | 12% | $5,079 |
| 2023 | 221 | 163 | 17% (37) | None | $6,892 |
| 2022 | 159 | 124 | 25% (40) | None | $3,297 |
| 2021 | 148 | 119 | 19% (28) | 7% | $4,882 |
| 2020 | 113 | 86 | 17% (19) | 13% | $6,365 |
| 2019 | 211 | 154 | 20% (43) | 12% | $3,598 |
| 2018 | 179 | 127 | 16% (28) | 13% | $3,564 |
| 2017 | 190 | 148 | 25% (48) | 11% | $4,418 |
| 2016 | 170 | 120 | 28% (47) | 12% | $4,461 |
| 2015 | 166 | 123 | 37% (61) | 10% | $3,478 |
| 2014 | 199 | 157 | 34% (68) | None | $5,708 |
| 2013 | 186 | 136 | 32% (60) | 12% | $3,470 |
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
| Cefpodoxime Proxetil | 23 | $808 | $35 |
| Albuterol Sulfate Hfa | 12 | $192 | $16 |
| Cephalexin | 14 | $145 | $10 |
| Hydrocodone-Acetaminophen | 19 | $132 | $7 |
| Oxycodone | 18 | $111 | $6 |
2022: 3 drugs
| Cefpodoxime Proxetil | 14 | $429 | $31 |
| Hydrocodone-Acetaminophen | 27 | $194 | $7 |
| Oxycodone | 11 | $65 | $6 |
2021: 2 drugs
| Cephalexin | 17 | $163 | $10 |
| Hydrocodone-Acetaminophen | 21 | $145 | $7 |
2020: 3 drugs
| Cefpodoxime Proxetil | 14 | $466 | $33 |
| Hydrocodone-Acetaminophen | 18 | $139 | $8 |
| Cephalexin | 11 | $90 | $8 |
2019: 3 drugs
| Amoxicillin-Clavulanate Potass | 17 | $338 | $20 |
| Hydrocodone-Acetaminophen | 39 | $277 | $7 |
| Cephalexin | 24 | $196 | $8 |
2018: 4 drugs
| Ventolin Hfa | 12 | $549 | $46 |
| Prednisone | 15 | $350 | $23 |
| Cephalexin | 21 | $218 | $10 |
| Hydrocodone-Acetaminophen | 22 | $163 | $7 |
2017: 5 drugs
| Ventolin Hfa | 16 | $661 | $41 |
| Hydrocodone-Acetaminophen | 42 | $447 | $11 |
| Prednisone | 13 | $339 | $26 |
| Ondansetron Odt | 17 | $212 | $12 |
| Cephalexin | 17 | $178 | $10 |
2016: 4 drugs
| Hydrocodone-Acetaminophen | 40 | $554 | $14 |
| Prednisone | 11 | $195 | $18 |
| Cephalexin | 11 | $171 | $16 |
| Ondansetron Odt | 16 | $147 | $9 |
2015: 2 drugs
| Hydrocodone-Acetaminophen | 46 | $689 | $15 |
| Cephalexin | 18 | $234 | $13 |
2014: 3 drugs
| Hydrocodone-Acetaminophen | 62 | $705 | $11 |
| Cephalexin | 16 | $245 | $15 |
| Prednisone | 12 | $172 | $14 |
2013: 1 drug
| Hydrocodone-Acetaminophen | 53 | $442 | $8 |
Professional record
- NPI
- 1386721215
- Licence
- CA A79890California A79890: Current · expires 2028-06-30
- Trained
- University of Hawaii John A. Burns School of Medicine, 2001
- Gender
- Male
More record details
- Sole proprietor
- No
- Medicaid ID
- CA 00A798900
- Taxonomy
- Federal specialty code 207P00000X (207P00000X)
- Mailing address
- 1800 Harrison St Fl 7, Oakland, CA, 94612
- NPI first listed
- 2006-10-31
- NPI last updated
- 2021-12-13
This is when the NPI record was last certified, not a medical board exam.
This office lists an electronic records connection.