Loretta B Chou, MD
Orthopedic Surgery · Stanford
- Medicare standing
- Clear
- Enrolled, allowed to bill and order, not excluded
- Plans that list them
- 9
- 1 carrier
- Offices
- 3
Offices
3 locations · 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
9 plans · 1 carrier
A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Chou’s office at (650) 723-4000 to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.
| 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 |
California Medical Board record
Licence G60695 · Current
Licensed to practise in California · since 1987 · expires 2027-03-31 · University of California, Irvine College 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.
- 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
$49,271
Medicare paid this office $49,271 for 133 people.
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
| Short return visit (20+ min) | 79 | $7,813 | $60 |
| Return visit (30+ min) | 49 | $4,868 | $89 |
| New patient visit (45+ min) | 31 | $3,060 | $99 |
Who their Medicare patients are
133 Original Medicare patients in 2024. Average age 73 · Women 62% · Also on Medicaid 14% · Health risk score 1.41. Above the middle of the specialty; the typical orthopedic surgery clinician is at 1.13.
Conditions among them: High blood pressure 65% · Diabetes 29% · Coronary heart disease 29% · Chronic kidney disease 23% · Depression 23% · Heart failure 21% · Cancer 17% · Atrial fibrillation 17% · COPD 12%.
The office billed $450,272, Medicare allowed $64,264 and paid $49,271; for 333 services of 50 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 | 133 | 333 | 73 | 1.41 | $450,272 | $49,271 |
| 2023 | 144 | 330 | 70 | 1.21 | $553,893 | $51,530 |
| 2022 | 155 | 301 | 70 | 1.14 | $312,725 | $41,815 |
| 2021 | 167 | 375 | 69 | 1.30 | $427,798 | $56,908 |
| 2020 | 143 | 316 | 71 | 1.42 | $426,217 | $56,348 |
| 2019 | 164 | 365 | 72 | 1.14 | $280,619 | $43,587 |
| 2018 | 178 | 376 | 69 | 1.11 | $325,620 | $47,621 |
| 2017 | 177 | 400 | 68 | 1.32 | $402,345 | $45,612 |
| 2016 | 218 | 440 | 69 | 1.37 | $383,449 | $49,084 |
| 2015 | 209 | 457 | 69 | 1.39 | $600,459 | $69,943 |
| 2014 | 223 | 419 | 69 | 1.42 | $449,888 | $59,339 |
| 2013 | 237 | 526 | 68 | 1.36 | $500,876 | $63,220 |
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
| Short return visit (20+ min) | 62 | $5,093 | $53 |
| Return visit (30+ min) | 58 | $4,920 | $73 |
| New patient visit (45+ min) | 41 | $4,320 | $105 |
| Imaging guidance for procedure, 60 minutes or less | 13 | $182 | $14 |
2022: 3 services
| New patient visit (45+ min) | 51 | $5,542 | $109 |
| Short return visit (20+ min) | 56 | $4,937 | $51 |
| Return visit (30+ min) | 55 | $4,730 | $83 |
2021: 4 services
| Return visit (30+ min) | 63 | $6,161 | $82 |
| Short return visit (20+ min) | 74 | $5,596 | $52 |
| New patient visit (45+ min) | 40 | $3,994 | $100 |
| Imaging guidance for procedure, 60 minutes or less | 16 | $234 | $14 |
2020: 4 services
| New patient visit (45+ min) | 53 | $5,835 | $110 |
| Short return visit (20+ min) | 60 | $3,317 | $39 |
| Return visit (30+ min) | 50 | $3,259 | $60 |
| Imaging guidance for procedure, 60 minutes or less | 16 | $227 | $14 |
2019: 4 services
| Short return visit (20+ min) | 102 | $6,823 | $41 |
| Return visit (30+ min) | 33 | $2,476 | $67 |
| New patient visit (45+ min) | 20 | $2,308 | $115 |
| New patient visit (30+ min) | 35 | $1,742 | $50 |
2018: 3 services
| Short return visit (20+ min) | 117 | $6,538 | $39 |
| New patient visit (30+ min) | 62 | $3,874 | $62 |
| Imaging guidance for procedure, 60 minutes or less | 13 | $100 | $8 |
2017: 4 services
| Short return visit (20+ min) | 126 | $8,233 | $39 |
| New patient visit (30+ min) | 44 | $2,074 | $47 |
| Return visit (30+ min) | 13 | $772 | $59 |
| Imaging guidance for procedure, 60 minutes or less | 11 | $85 | $8 |
2016: 4 services
| Short return visit (20+ min) | 138 | $8,770 | $40 |
| New patient visit (30+ min) | 60 | $3,491 | $58 |
| Return visit (30+ min) | 39 | $2,523 | $65 |
| Imaging guidance for procedure, 60 minutes or less | 18 | $146 | $8 |
2015: 4 services
| Short return visit (20+ min) | 124 | $7,235 | $43 |
| New patient visit (30+ min) | 62 | $3,781 | $61 |
| Short return visit | 14 | $319 | $23 |
| Imaging guidance for procedure, 60 minutes or less | 33 | $262 | $8 |
2014: 5 services
| Short return visit (20+ min) | 132 | $6,848 | $39 |
| Removal of deep implant from bone | 15 | $4,896 | $272 |
| New patient visit (30+ min) | 68 | $4,160 | $61 |
| Return visit (30+ min) | 15 | $980 | $65 |
| Imaging guidance for procedure, 60 minutes or less | 23 | $174 | $8 |
2013: 4 services
| Short return visit (20+ min) | 154 | $9,915 | $38 |
| Fusion of big toe at joint with foot | 14 | $7,613 | $544 |
| New patient visit (30+ min) | 100 | $6,005 | $60 |
| Imaging guidance for procedure, 60 minutes or less | 28 | $212 | $8 |
Medicaid work
$396 in 2023
Medicaid paid $396 for 13 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.
| Short return visit (20+ min) | 13 | $396 |
| 2023 | 13 | 1 | 12 | $396 |
| 2022 | 14 | 1 | 14 | $301 |
See the largest Medicaid services in earlier years
2022
| Short return visit (20+ min) | 14 | $301 |
Money from drug and device companies
$2,696 in 2025
| 2025 | 6 | 10 | None | $2,696 |
| 2024 | 4 | 33 | None | $5,086 |
| 2023 | 4 | 20 | None | $3,731 |
| 2022 | 3 | 24 | None | $7,456 |
| 2021 | 3 | 13 | None | $1,318 |
| 2020 | 2 | 13 | None | $1,598 |
| 2019 | 5 | 6 | None | $588 |
Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.
A payment is not proof that care is biased.
| Exactech | Epic Foot Plate System | $1,234 | 3 payments
|
| Stryker | Infinity | $881 | 2 payments
|
| Evolution Surgical | None | $182 | 2 payments
|
| Trilliant Surgical | 13mm Star E+ Sliding Core Star Total Ankle | $150 | 1 payment
|
| Novastep | Nexis | $149 | 1 payment
|
| Paragon 28 | Mtp | $100 | 1 payment
|
See all 10 published payments
| Evolution Surgical | Meals · 2025-12-08 | None | $40 |
| Paragon 28 | Meals · 2025-11-12 | Mtp | $100 |
| Evolution Surgical | Meals · 2025-10-21 | None | $142 |
| Stryker | Travel · 2025-10-06 | Infinity | $778 |
| Trilliant Surgical | Meals · 2025-09-11 | 13mm Star E+ Sliding Core Star Total Ankle | $150 |
| Novastep | Meals · 2025-09-06 | Nexis | $149 |
| Exactech | Meals · 2025-08-22 | Epic Foot Plate System | $490 |
| Exactech | Travel · 2025-08-22 | Epic Foot Plate System | $323 |
| Exactech | Travel · 2025-08-22 | Epic Foot Plate System | $420 |
| Stryker | Meals · 2025-03-12 | Prostep Mica | $104 |
See earlier years (2024, 2023, 2022, 2021, 2020, 2019)
2024: $5,086
| Stryker | Infinity | $2,479 | 16 payments
|
| Evolution Surgical | None | $1,444 | 2 payments
|
| Arthrex | None | $1,064 | 14 payments
|
| Exactech | Vantage | $99 | 1 payment
|
2023: $3,731
| Evolution Surgical | None | $2,279 | 3 payments
|
| Arthrex | None | $1,035 | 14 payments
|
| Stryker | Infinity | $296 | 2 payments
|
| Exactech | Vantage | $121 | 1 payment
|
2022: $7,456
| Arthrex | None | $4,785 | 20 payments
|
| Evolution Surgical | None | $2,573 | 3 payments
|
| DePuy Synthes Sales | Elite | $98 | 1 payment
|
2021: $1,318
| Evolution Surgical | None | $628 | 4 payments
|
| Arthrex | None | $494 | 7 payments
|
| Stryker | Inbone | $197 | 2 payments
|
2020: $1,598
| Arthrex | None | $1,371 | 10 payments
|
| Evolution Surgical | None | $228 | 3 payments
|
2019: $588
| Stryker | Apex | $266 | 2 payments
|
| DePuy Synthes Sales | Elite | $114 | 1 payment
|
| Evolution Surgical | None | $106 | 1 payment
|
| Zimmer Biomet Holdings | Biomet Orthopak | $63 | 1 payment
|
| Bioventus | Exogen | $39 | 1 payment
|
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
- 1720174287
- Licence
- CA G60695California G60695: Current · expires 2027-03-31
- Trained
- University of California, Irvine, California College of Medicine, 1986
- Group
- Stanford Health Care
- Video visits
- Lists video visits
- Gender
- Female
More record details
- Sole proprietor
- Yes
- Taxonomy
- Federal specialty code 207XX0004X (207XX0004X); Orthopedic surgery (207X00000X)
- Mailing address
- 300 Pasteur Dr, Stanford, CA, 94305
- NPI first listed
- 2006-10-04
- NPI last updated
- 2024-04-23
- NPI record certified
- 2024-04-23
This is when the NPI record was last certified, not a medical board exam.