Joy Y Wu, MD
Internal Medicine · Stanford
- Medicare standing
- Clear
- Enrolled, allowed to bill and order, not excluded
- Plans that list them
- 17
- 3 carriers
- Office
- 1
Offices
1 location · Stanford Health Care · 3,152 clinicians in this group
Hospitals listed: Stanford Health Care. That is not proof they admit you there this week.
Plans that list them
17 plans · 3 carriers
A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Wu’s office at (650) 723-4000 to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.
17 of 17 plans
| Alignment Health BreathEasy (HMO C-SNP) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Clarity (HMO C-SNP) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Harmony (HMO) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Heart & Diabetes (HMO C-SNP) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Heart & Diabetes CalPlus (HMO C-SNP) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Heart & Diabetes Care (HMO C-SNP) | Alignment Health Plan | Listed | Sep 28, 2026 |
| Alignment Health Heart & Diabetes Choice (HMO C-SNP) | Alignment Health Plan | Listed | Sep 28, 2026 |
| Alignment Health Honor+ Plan (HMO) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health My Choice CalCare (HMO) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Silicon (HMO C-SNP) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health smartHMO (HMO) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health the ONE (HMO) | Alignment Health Plan | Listed | Oct 3, 2026 |
| SCAN Balance (HMO C-SNP) | SCAN Health Plan | Listed | Oct 3, 2026 |
| SCAN Classic (HMO) | SCAN Health Plan | Listed | Oct 3, 2026 |
| SCAN MyChoice (HMO) | SCAN Health Plan | Listed | Oct 3, 2026 |
| SCAN Strive (HMO C-SNP) | SCAN Health Plan | Listed | Oct 3, 2026 |
| DualConnect (HMO D-SNP) | Santa Clara Family Health Plan | Listed | Sep 1, 2026 |
California Medical Board record
Licence C55455 · Current
Licensed to practise in California · since 2012 · expires 2028-07-31 · Duke University School of Medicine.
No disciplinary actions, convictions, malpractice judgments or citations in this record.
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.
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
$17,553
Medicare paid this office $17,553 for 164 people.
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
| Return visit (30+ min) | 70 | $7,933 | $107 |
| Return visit (30+ min) | 71 | $5,977 | $83 |
| New patient visit (45+ min) | 14 | $1,316 | $94 |
Who their Medicare patients are
164 Original Medicare patients in 2024. Average age 75 · Under 65 7% · 85 and older 13% · Women 87% · Also on Medicaid 21% · Health risk score 1.56. At or below the middle of the specialty; the typical internal medicine clinician is at 1.76.
Conditions among them: High blood pressure 59% · Cancer 38% · Coronary heart disease 21% · Chronic kidney disease 19% · Depression 19% · Atrial fibrillation 17% · Diabetes 16% · COPD 13% · Heart failure 12%.
The office billed $77,125, Medicare allowed $24,452 and paid $17,553; for 185 services of 6 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 | 164 | 185 | 75 | 1.56 | $77,125 | $17,553 |
| 2023 | 180 | 212 | 75 | 1.40 | $88,526 | $17,301 |
| 2022 | 180 | 217 | 75 | 1.30 | $103,758 | $16,753 |
| 2021 | 188 | 230 | 75 | 1.44 | $136,959 | $20,841 |
| 2020 | 179 | 183 | 75 | 1.31 | $82,398 | $12,702 |
| 2019 | 189 | 204 | 74 | 1.40 | $21,306 | $13,626 |
| 2018 | 194 | 221 | 73 | 1.48 | $28,029 | $15,649 |
| 2017 | 181 | 203 | 72 | 1.59 | $43,521 | $15,456 |
| 2016 | 128 | 160 | 71 | 1.44 | $38,640 | $12,547 |
| 2015 | 105 | 139 | 74 | 1.43 | $32,389 | $10,063 |
| 2014 | 70 | 76 | 73 | 1.03 | $21,433 | $6,775 |
| 2013 | 36 | 43 | 69 | 1.52 | $13,301 | $3,989 |
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: 4 services
| Return visit (30+ min) | 142 | $11,919 | $81 |
| New patient visit (45+ min) | 16 | $1,870 | $117 |
| Initial hospital care with straightforward or low-level medical decision making at least 55 minutes | 12 | $1,435 | $120 |
| Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes | 11 | $1,084 | $45 |
2022: 2 services
| Return visit (30+ min) | 149 | $11,786 | $75 |
| New patient visit (45+ min) | 12 | $1,374 | $114 |
2021: 3 services
| Return visit (30+ min) | 108 | $9,240 | $83 |
| Long return visit (40+ min) | 48 | $5,795 | $114 |
| Telephone medical discussion with physician, 21-30 minutes | 11 | $857 | $71 |
2020: 4 services
| Return visit (30+ min) | 117 | $7,916 | $67 |
| New patient visit (45+ min) | 25 | $2,239 | $90 |
| Return visit (30+ min) | 19 | $1,171 | $62 |
| Telephone medical discussion with physician, 21-30 minutes | 13 | $814 | $63 |
2019: 2 services
| Return visit (30+ min) | 160 | $10,188 | $60 |
| New patient visit (45+ min) | 23 | $2,405 | $105 |
2018: 3 services
| Return visit (30+ min) | 152 | $10,219 | $64 |
| Long return visit (40+ min) | 20 | $1,850 | $92 |
| New patient visit (45+ min) | 17 | $1,614 | $95 |
2017: 3 services
| Return visit (30+ min) | 98 | $6,101 | $57 |
| New patient visit (45+ min) | 47 | $4,665 | $99 |
| Long return visit (40+ min) | 32 | $3,165 | $99 |
2016: 2 services
| Return visit (30+ min) | 85 | $7,238 | $66 |
| New patient visit (45+ min) | 34 | $3,746 | $110 |
2015: 2 services
| Return visit (30+ min) | 79 | $6,099 | $63 |
| New patient visit (45+ min) | 24 | $2,540 | $106 |
2014: 2 services
| New patient visit (45+ min) | 37 | $4,162 | $112 |
| Return visit (30+ min) | 27 | $1,938 | $67 |
2013: 1 service
| New patient visit (45+ min) | 21 | $2,238 | $107 |
Medicaid work
$154 in 2023
Medicaid paid $154 for 12 billed services this clinician did in 2023, up to 12 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.
| Return visit (30+ min) | 12 | $154 |
| 2023 | 12 | 1 | 12 | $154 |
Drugs they prescribed that Part D paid
$110,366
Pharmacies billed $110,366 in 2024.
This is pharmacy cost, not the office bill, and not what patients paid.
Opioids were 0% of their Part D prescriptions (0 of 185) in 2024. At or below the middle of the specialty; the typical internal medicine clinician is at 1%.
143 generic and fewer than 11 brand-name prescriptions · $110,366 in drug cost.
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.
| Tymlos | 35 | $92,253 | $2,636 |
| Alendronate | 110 | $1,868 | $17 |
Year by year
| 2024 | 185 | 41 | 0% (0) | None | $110,366 |
| 2023 | 119 | 40 | 0% (0) | None | $38,794 |
| 2022 | 97 | 33 | None | None | $1,268 |
| 2021 | 150 | 39 | 0% (0) | None | $36,493 |
| 2020 | 197 | 50 | 0% (0) | None | $71,673 |
| 2019 | 178 | 46 | 0% (0) | None | $21,774 |
| 2018 | 248 | 50 | 0% (0) | 6% | $3,805 |
| 2017 | 308 | 64 | 0% (0) | None | $96,144 |
| 2016 | 258 | 54 | 0% (0) | None | $170,204 |
| 2015 | 222 | 48 | 0% (0) | 29% | $118,591 |
| 2014 | 109 | 26 | 0% (0) | 25% | $36,607 |
| 2013 | 34 | None | 0% (0) | 44% | $22,026 |
Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.
See the drugs prescribed each year
2023: 2 drugs
| Tymlos | 14 | $37,017 | $2,644 |
| Alendronate | 97 | $1,431 | $15 |
2022: 1 drug
| Alendronate | 90 | $1,153 | $13 |
2021: 2 drugs
| Tymlos | 15 | $34,052 | $2,270 |
| Alendronate | 118 | $1,663 | $14 |
2020: 2 drugs
| Tymlos | 20 | $54,574 | $2,729 |
| Alendronate | 147 | $1,327 | $9 |
2019: 2 drugs
| Alendronate | 142 | $1,377 | $10 |
| Levothyroxine | 12 | $340 | $28 |
2018: 3 drugs
| Alendronate | 213 | $1,675 | $8 |
| Raloxifene | 17 | $1,105 | $65 |
| Levothyroxine | 14 | $446 | $32 |
2017: 3 drugs
| Forteo | 30 | $92,458 | $3,082 |
| Alendronate | 245 | $1,484 | $6 |
| Raloxifene | 17 | $1,224 | $72 |
2016: 3 drugs
| Forteo | 63 | $163,516 | $2,595 |
| Alendronate | 164 | $1,214 | $7 |
| Raloxifene | 11 | $793 | $72 |
2015: 3 drugs
| Forteo | 47 | $107,711 | $2,292 |
| Alendronate | 136 | $926 | $7 |
| Bd Ultra-Fine Pen Needle | 19 | $226 | $12 |
2014: 3 drugs
| Forteo | 22 | $33,762 | $1,535 |
| Alendronate | 70 | $575 | $8 |
| Bd Ultra-Fine Pen Needle | 12 | $236 | $20 |
2013: 2 drugs
| Forteo | 13 | $19,772 | $1,521 |
| Alendronate | 13 | $201 | $15 |
Money from drug and device companies
$21 in 2025
A payment is not proof that care is biased.
| ACADIA Pharmaceuticals | None | $21 | 1 payment
|
See the published payment
| ACADIA Pharmaceuticals | Meals · 2025-08-27 | None | $21 |
Research money
Money a company paid to run a study. Where it went to their institution, the clinician is named as an investigator and did not receive it; the amount covers the whole study, often across many sites.
| Radius Health, Inc. · G Stimulatory Protein-Mediated Signaling Downstream of Pth1r · 2019 | Their institution | $47,100 |
| Radius Health, Inc. · G Stimulatory Protein-Mediated Signaling Downstream of Pth1r · 2021 | Their institution | $47,100 |
Professional record
- NPI
- 1619968351
- Licence
- CA C55455, MA 216594California C55455: Current · expires 2028-07-31
- Trained
- Duke University School of Medicine, 2001
- Group
- Stanford Health Care
- Video visits
- Lists video visits
- Gender
- Female
More record details
- Sole proprietor
- No
- Taxonomy
- Federal specialty code 207RE0101X (207RE0101X); Internal medicine (207R00000X)
- Mailing address
- 300 Pasteur Dr., A175, Stanford, CA, 94305
- NPI first listed
- 2005-11-02
- NPI last updated
- 2024-04-12
- NPI record certified
- 2024-04-12
This is when the NPI record was last certified, not a medical board exam.
Extra NPI addresses: 300 Pasteur Dr., A175, Stanford, CA, 94305