Willa Jolie Chen, MD
Family Practice · Oakland
- 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
- 4
Offices
4 locations · Sutter Bay Medical Foundation · 3,783 clinicians in this group
Looking this up.
Hospitals listed: Alta Bates Summit Medical Center. 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. Chen’s office to ask if they take your plan before you enroll.
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.
- Alta Bates Summit Medical CenterOakland, CAAcute Care Hospital · Voluntary non-profit - Private · Has an emergency departmentPart of Sutter Health, which runs 27 hospitals in 2 statesPatients rate it 3 of 5 · 78% would definitely recommend itOverall rating: 5 of 5 starsBetter than the national rate — Death rate among surgical inpatients with serious treatable complications: 130.09 (87.72 to 172.46) · 109 cases, Jul 2022 – Jun 2024Better than the national rate — Central Line Associated Bloodstream Infection (ICU + select Wards): 0.274, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.227, Oct 2024 – Sep 2025
See every measure and the patient survey for Alta Bates Summit Medical Center
Behind the star rating — Deaths: 2 better, 6 the same, 0 worse of 8 measures. Safety: 4 better, 3 the same, 0 worse of 7 measures. Readmissions: 3 better, 6 the same, 0 worse of 9 measures. The star rating is worked out from an earlier period than the measures below, so the two can disagree.
| Death rate among surgical inpatients with serious treatable complicationsComplications and deaths | 130.09 (87.72 to 172.46) · 109 cases | Better | Jul 2022 – Jun 2024 |
| Central Line Associated Bloodstream Infection (ICU + select Wards)Infections | 0.274 | Better | Oct 2024 – Sep 2025 |
| Clostridium Difficile (C.Diff)Infections | 0.227 | Better | Oct 2024 – Sep 2025 |
| Abdominopelvic accidental puncture or laceration rateComplications and deaths | 1 (0.06 to 1.94) · 1,209 cases | No different | Jul 2022 – Jun 2024 |
| CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths | 0.88 (0.6 to 1.16) | No different | Jul 2022 – Jun 2024 |
| Death rate for CABG surgery patientsComplications and deaths | 2 · 89 cases | None | Jul 2022 – Jun 2025 |
| Death rate for COPD patientsComplications and deaths | 6.9 · 105 cases | None | Jul 2022 – Jun 2025 |
| Death rate for heart attack patientsComplications and deaths | 9.8 · 270 cases | None | Jul 2022 – Jun 2025 |
| Death rate for heart failure patientsComplications and deaths | 8.9 · 447 cases | None | Jul 2022 – Jun 2025 |
| Death rate for pneumonia patientsComplications and deaths | 13.7 · 341 cases | None | Jul 2022 – Jun 2025 |
| Death rate for stroke patientsComplications and deaths | 11.2 · 381 cases | None | Jul 2023 – Jun 2025 |
| Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths | 2.6 · 2,811 cases | None | Jul 2024 – Jun 2025 |
| Iatrogenic pneumothorax rateComplications and deaths | 0.13 (0 to 0.31) · 7,167 cases | No different | Jul 2022 – Jun 2024 |
| In-hospital fall-associated fracture rateComplications and deaths | 0.21 (0.02 to 0.4) · 7,659 cases | No different | Jul 2022 – Jun 2024 |
| Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths | 2.93 (0.92 to 4.94) · 1,668 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative acute kidney injury requiring dialysis rateComplications and deaths | 1.25 (0 to 2.75) · 580 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative hemorrhage or hematoma rateComplications and deaths | 2.67 (1.19 to 4.15) · 1,446 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative respiratory failure rateComplications and deaths | 6.17 (0.33 to 12.02) · 633 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative sepsis rateComplications and deaths | 8.11 (4.67 to 11.55) · 619 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative wound dehiscence rateComplications and deaths | 1.61 (0.15 to 3.07) · 309 cases | No different | Jul 2022 – Jun 2024 |
| Pressure ulcer rateComplications and deaths | 0.39 (0 to 0.96) · 6,085 cases | No different | Jul 2022 – Jun 2024 |
| Rate of complications for hip/knee replacement patientsComplications and deaths | 3.8 · 217 cases | None | Apr 2023 – Mar 2025 |
| Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections | 0.724 | No different | Oct 2024 – Sep 2025 |
| MRSA BacteremiaInfections | 1.425 | No different | Oct 2024 – Sep 2025 |
| SSI - Colon SurgeryInfections | 0.716 | No different | Oct 2024 – Sep 2025 |
| Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits | 12.7 · 416 cases | None | Jul 2023 – Jun 2025 |
| Heart failure (HF) 30-Day Readmission RateUnplanned return visits | 19.6 · 606 cases | None | Jul 2023 – Jun 2025 |
| Hospital return days for heart attack patientsUnplanned return visits | -30.4 · 359 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for heart failure patientsUnplanned return visits | -31.8 · 555 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for pneumonia patientsUnplanned return visits | -14.4 · 358 cases | None | Jul 2022 – Jun 2025 |
| Pneumonia (PN) 30-Day Readmission RateUnplanned return visits | 16 · 382 cases | None | Jul 2023 – Jun 2025 |
| Rate of emergency department (ED) visits for patients receiving outpatient chemotherapyUnplanned return visits | 5.1 (3.2 to 8.2) · 25 cases | No different | Jan 2024 – Dec 2024 |
| Rate of inpatient admissions for patients receiving outpatient chemotherapyUnplanned return visits | 10.8 (7.3 to 16) · 25 cases | No different | Jan 2024 – Dec 2024 |
| Rate of readmission after hip/knee replacementUnplanned return visits | 4.5 · 232 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for CABGUnplanned return visits | 9.9 · 56 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits | 20 · 152 cases | None | Jul 2023 – Jun 2025 |
| Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits | 14.8 (11.1 to 20) · 251 cases | No different | Jan 2022 – Dec 2024 |
| Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits | 1.2 (0.9 to 1.5) · 579 cases | No different | Jan 2024 – Dec 2024 |
What patients said (535 patients answered, 18% of those asked)
| Cleanliness | 4 |
| Nurse communication | 3 |
| Doctor communication | 4 |
| Communication about medicines | 2 |
| Discharge information | 3 |
| Overall hospital rating | 4 |
| Quietness | 3 |
| Recommend hospital | 5 |
| Room was "always" clean | 73% |
| Nurses "always" communicated well | 75% |
| Doctors "always" communicated well | 81% |
| Staff "always" explained | 58% |
| Yes, staff "did" give patients this information | 86% |
| Yes, staff "did" give patients information about help after discharge | 87% |
| Doctors "always" explained things so they could understand | 76% |
| Doctors "always" listened carefully | 79% |
| Doctors "always" treated them with courtesy and respect | 87% |
| Patients who gave a rating of "9" or "10" (high) | 75% |
| Staff "always" explained new medications | 73% |
| Nurses "always" explained things so they could understand | 69% |
| Nurses "always" listened carefully | 72% |
| Nurses "always" treated them with courtesy and respect | 85% |
| "Always" quiet at night | 54% |
| "YES", patients would definitely recommend the hospital | 78% |
| Staff "always" explained possible side effects | 43% |
| Yes, staff "did" give patients information about possible symptoms | 86% |
Medicaid work
$8,930 in 2022
Medicaid paid $8,930 for 52 billed services this clinician did in 2022, up to 25 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.
| Clinic visit/encounter, all-inclusive | 37 | $8,930 |
| Short return visit (20+ min) | 15 | $0 |
| 2022 | 52 | 2 | 25 | $8,930 |
Drugs they prescribed that Part D paid
$53,263
Pharmacies billed $53,263 in 2024.
This is pharmacy cost, not the office bill, and not what patients paid.
401 generic and 45 brand-name prescriptions · $53,263 in drug cost · 14 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.
| Jardiance | 12 | $20,169 | $1,681 |
| Finasteride | 21 | $193 | $9 |
| Omega-3 Acid Ethyl Esters | 28 | $192 | $7 |
| Atorvastatin | 46 | $182 | $4 |
| Losartan | 23 | $109 | $5 |
See all 7 drugs
| Jardiance | 12 | $20,169 | $1,681 |
| Finasteride | 21 | $193 | $9 |
| Omega-3 Acid Ethyl Esters | 28 | $192 | $7 |
| Atorvastatin | 46 | $182 | $4 |
| Losartan | 23 | $109 | $5 |
| Amlodipine Besylate | 30 | $97 | $3 |
| Metoprolol | 18 | $80 | $4 |
Year by year
| 2024 | 446 | 91 | None | 10% | $53,263 |
| 2023 | 279 | 61 | None | 10% | $33,843 |
| 2022 | 51 | 22 | 0% (0) | None | $956 |
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
| Atorvastatin | 42 | $567 | $14 |
| Amlodipine Besylate | 14 | $223 | $16 |
| Omeprazole | 13 | $195 | $15 |
| Omega-3 Acid Ethyl Esters | 26 | $193 | $7 |
| Metoprolol | 12 | $33 | $3 |
Professional record
- NPI
- 1497496244
- Gender
- Female
More record details
- Sole proprietor
- No
- Taxonomy
- Family medicine (207Q00000X); Hospitalist (208M00000X); Student in a training program (390200000X)
- Mailing address
- Po Box 276950, Sacramento, CA, 95827
- NPI first listed
- 2022-04-05
- NPI last updated
- 2025-09-18
- NPI record certified
- 2025-09-18
This is when the NPI record was last certified, not a medical board exam.
Extra NPI addresses: 455 Oconnor Dr Ste 250, San Jose, CA, 95128