May-Anh Nguyen, MD
General Surgery · Mountain View
- Medicare standing
- Clear
- Enrolled, allowed to bill and order, not excluded
- Plans that list them
- 33
- 9 carriers
- Office
- 1
Offices
1 location · Shyamali Mallick Singhal MD PHD Inc · 6 clinicians in this group
Looking this up.
Hospitals listed: El Camino Health · Good Samaritan Hospital. That is not proof they admit you there this week.
Plans that list them
33 plans · 9 carriers
A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Nguyen’s office at (650) 641-7861 to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.
33 of 33 plans
| Aetna Medicare Eagle (PPO) | Aetna Medicare | Listed | Sep 8, 2026 |
| Aetna Medicare Enhanced (PPO) | Aetna Medicare | Listed | Sep 8, 2026 |
| Alignment Health Advantage PPO (PPO) | Alignment Health Plan | Listed | Oct 3, 2026 |
| 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 |
| Anthem Full Dual Advantage Aligned (HMO D-SNP) | Anthem Blue Cross | Listed | Oct 3, 2026 |
| Anthem Medicare Advantage (HMO-POS) | Anthem Blue Cross | Listed | Oct 3, 2026 |
| Anthem Prime (HMO-POS) | Anthem Blue Cross Partnership Plan | Listed | Oct 3, 2026 |
| Astiva Health C-SNP WOW - NorCal (HMO C-SNP) | Astiva Health | Listed | Sep 27, 2026 |
| Astiva Health Premier Plan - NorCal (HMO) | Astiva Health | Listed | Sep 27, 2026 |
| Astiva Health Savings Plan - NorCal (HMO) | Astiva Health | Listed | Sep 27, 2026 |
| Blue Shield Inspire (HMO) | Blue Shield of California | Listed | Aug 26, 2026 |
| Central Health Classic Care Plan III (HMO) | Central Health Medicare Plan | Listed | Aug 15, 2026 |
| Central Health Dual Access Plan (HMO D-SNP) | Central Health Medicare Plan | Listed | Aug 15, 2026 |
| Central Health Embrace Choice Plan (HMO C-SNP) | Central Health Medicare Plan | Listed | Aug 15, 2026 |
| Central Health Valor Care Plan (HMO) | Central Health Medicare Plan | Listed | Aug 15, 2026 |
| Imperial Courage Plan (HMO) | Imperial Health Plan of California, Inc. | Listed | Sep 1, 2026 |
| Imperial Dynamic Plan (HMO) | Imperial Health Plan of California, Inc. | Listed | Sep 1, 2026 |
| Imperial Senior Value (HMO C-SNP) | Imperial Health Plan of California, Inc. | Listed | Sep 1, 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 |
Hospitals they work in
2 hospitals
These rate the hospital, not this clinician. Most measures at most hospitals are no different from the national rate.
- El Camino HealthMountain View, CAAcute Care Hospital · Government - Hospital District or Authority · Has an emergency department · Birthing-friendlyPart of El Camino Health, which runs 2 hospitalsPatients rate it 4 of 5 · 80% would definitely recommend itOverall rating: 4 of 5 starsBetter than the national rate — Central Line Associated Bloodstream Infection (ICU + select Wards): 0.291, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.393, Oct 2024 – Sep 2025Better than the national rate — MRSA Bacteremia: 0, Oct 2024 – Sep 2025
- Good Samaritan HospitalSan Jose, CAAcute Care Hospital · Proprietary · Has an emergency department · Birthing-friendlyPart of HCA Healthcare, which runs 185 hospitals in 19 statesPatients rate it 2 of 5 · 67% would definitely recommend itOverall rating: 2 of 5 starsBetter than the national rate — Clostridium Difficile (C.Diff): 0.337, Oct 2024 – Sep 2025
See every measure and the patient survey for El Camino Health
Behind the star rating — Deaths: 3 better, 5 the same, 0 worse of 8 measures. Safety: 3 better, 5 the same, 0 worse of 8 measures. Readmissions: 1 better, 9 the same, 1 worse of 11 measures. The star rating is worked out from an earlier period than the measures below, so the two can disagree.
| Central Line Associated Bloodstream Infection (ICU + select Wards)Infections | 0.291 | Better | Oct 2024 – Sep 2025 |
| Clostridium Difficile (C.Diff)Infections | 0.393 | Better | Oct 2024 – Sep 2025 |
| MRSA BacteremiaInfections | 0 | Better | Oct 2024 – Sep 2025 |
| Abdominopelvic accidental puncture or laceration rateComplications and deaths | 0.96 (0.12 to 1.79) · 2,340 cases | No different | Jul 2022 – Jun 2024 |
| CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths | 1.02 (0.76 to 1.28) | No different | Jul 2022 – Jun 2024 |
| Death rate among surgical inpatients with serious treatable complicationsComplications and deaths | 167.38 (125.03 to 209.73) · 96 cases | No different | Jul 2022 – Jun 2024 |
| Death rate for CABG surgery patientsComplications and deaths | 2.6 · 68 cases | None | Jul 2022 – Jun 2025 |
| Death rate for COPD patientsComplications and deaths | 7.1 · 185 cases | None | Jul 2022 – Jun 2025 |
| Death rate for heart attack patientsComplications and deaths | 11.8 · 200 cases | None | Jul 2022 – Jun 2025 |
| Death rate for heart failure patientsComplications and deaths | 8.9 · 814 cases | None | Jul 2022 – Jun 2025 |
| Death rate for pneumonia patientsComplications and deaths | 13 · 842 cases | None | Jul 2022 – Jun 2025 |
| Death rate for stroke patientsComplications and deaths | 9.6 · 361 cases | None | Jul 2023 – Jun 2025 |
| Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths | 2.6 · 4,633 cases | None | Jul 2024 – Jun 2025 |
| Iatrogenic pneumothorax rateComplications and deaths | 0.16 (0 to 0.34) · 11,474 cases | No different | Jul 2022 – Jun 2024 |
| In-hospital fall-associated fracture rateComplications and deaths | 0.27 (0.1 to 0.45) · 11,626 cases | No different | Jul 2022 – Jun 2024 |
| Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths | 3.14 (1.39 to 4.9) · 2,814 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative acute kidney injury requiring dialysis rateComplications and deaths | 2 (0.61 to 3.39) · 1,327 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative hemorrhage or hematoma rateComplications and deaths | 2.11 (0.8 to 3.43) · 2,641 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative respiratory failure rateComplications and deaths | 9.39 (4.18 to 14.6) · 1,287 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative sepsis rateComplications and deaths | 6.57 (3.47 to 9.68) · 1,308 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative wound dehiscence rateComplications and deaths | 2.14 (0.71 to 3.57) · 827 cases | No different | Jul 2022 – Jun 2024 |
| Pressure ulcer rateComplications and deaths | 0.6 (0.05 to 1.15) · 9,460 cases | No different | Jul 2022 – Jun 2024 |
| Rate of complications for hip/knee replacement patientsComplications and deaths | 4.5 · 122 cases | None | Apr 2023 – Mar 2025 |
| Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections | 0.993 | No different | Oct 2024 – Sep 2025 |
| SSI - Abdominal HysterectomyInfections | 0.706 | No different | Oct 2024 – Sep 2025 |
| SSI - Colon SurgeryInfections | 1.376 | No different | Oct 2024 – Sep 2025 |
| Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits | 15.5 · 218 cases | None | Jul 2023 – Jun 2025 |
| Heart failure (HF) 30-Day Readmission RateUnplanned return visits | 19.5 · 962 cases | None | Jul 2023 – Jun 2025 |
| Hospital return days for heart attack patientsUnplanned return visits | 3.8 · 200 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for heart failure patientsUnplanned return visits | -17 · 922 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for pneumonia patientsUnplanned return visits | 18.6 · 860 cases | None | Jul 2022 – Jun 2025 |
| Pneumonia (PN) 30-Day Readmission RateUnplanned return visits | 18.7 · 827 cases | None | Jul 2023 – Jun 2025 |
| Rate of emergency department (ED) visits for patients receiving outpatient chemotherapyUnplanned return visits | 6.1 (4.5 to 8.2) · 313 cases | No different | Jan 2024 – Dec 2024 |
| Rate of inpatient admissions for patients receiving outpatient chemotherapyUnplanned return visits | 13.4 (10.6 to 16.5) · 313 cases | No different | Jan 2024 – Dec 2024 |
| Rate of readmission after hip/knee replacementUnplanned return visits | 6.1 · 144 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for CABGUnplanned return visits | 10.3 · 80 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits | 20.7 · 237 cases | None | Jul 2023 – Jun 2025 |
| Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits | 12.8 (10 to 16.1) · 1,639 cases | No different | Jan 2022 – Dec 2024 |
| Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits | 0.9 (0.8 to 1.1) · 1,619 cases | No different | Jan 2024 – Dec 2024 |
What patients said (1,535 patients answered, 22% of those asked)
| Cleanliness | 4 |
| Nurse communication | 4 |
| Doctor communication | 4 |
| Communication about medicines | 3 |
| Discharge information | 3 |
| Overall hospital rating | 4 |
| Quietness | 2 |
| Recommend hospital | 5 |
| Room was "always" clean | 75% |
| Nurses "always" communicated well | 79% |
| Doctors "always" communicated well | 81% |
| Staff "always" explained | 61% |
| Yes, staff "did" give patients this information | 86% |
| Yes, staff "did" give patients information about help after discharge | 86% |
| 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) | 76% |
| Staff "always" explained new medications | 76% |
| Nurses "always" explained things so they could understand | 75% |
| Nurses "always" listened carefully | 76% |
| Nurses "always" treated them with courtesy and respect | 87% |
| "Always" quiet at night | 47% |
| "YES", patients would definitely recommend the hospital | 80% |
| Staff "always" explained possible side effects | 46% |
| Yes, staff "did" give patients information about possible symptoms | 86% |
See every measure and the patient survey for Good Samaritan Hospital
Behind the star rating — Deaths: 0 better, 8 the same, 0 worse of 8 measures. Safety: 1 better, 6 the same, 1 worse of 8 measures. Readmissions: 0 better, 5 the same, 4 worse of 9 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 | 0.337 | Better | Oct 2024 – Sep 2025 |
| Abdominopelvic accidental puncture or laceration rateComplications and deaths | 0.75 (0 to 1.67) · 1,340 cases | No different | Jul 2022 – Jun 2024 |
| CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths | 0.84 (0.54 to 1.14) | No different | Jul 2022 – Jun 2024 |
| Death rate among surgical inpatients with serious treatable complicationsComplications and deaths | 143.59 (98.7 to 188.49) · 98 cases | No different | Jul 2022 – Jun 2024 |
| Death rate for CABG surgery patientsComplications and deaths | 1.7 · 45 cases | None | Jul 2022 – Jun 2025 |
| Death rate for COPD patientsComplications and deaths | 7.1 · 100 cases | None | Jul 2022 – Jun 2025 |
| Death rate for heart attack patientsComplications and deaths | 12.7 · 270 cases | None | Jul 2022 – Jun 2025 |
| Death rate for heart failure patientsComplications and deaths | 11.3 · 573 cases | None | Jul 2022 – Jun 2025 |
| Death rate for pneumonia patientsComplications and deaths | 15.6 · 820 cases | None | Jul 2022 – Jun 2025 |
| Death rate for stroke patientsComplications and deaths | 8.5 · 482 cases | None | Jul 2023 – Jun 2025 |
| Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths | 3.3 · 3,711 cases | None | Jul 2024 – Jun 2025 |
| Iatrogenic pneumothorax rateComplications and deaths | 0.12 (0 to 0.3) · 8,866 cases | No different | Jul 2022 – Jun 2024 |
| In-hospital fall-associated fracture rateComplications and deaths | 0.2 (0.01 to 0.38) · 9,051 cases | No different | Jul 2022 – Jun 2024 |
| Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths | 2.65 (0.74 to 4.56) · 1,929 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative acute kidney injury requiring dialysis rateComplications and deaths | 1.8 (0.21 to 3.39) · 670 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative hemorrhage or hematoma rateComplications and deaths | 2.33 (0.88 to 3.78) · 1,836 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative respiratory failure rateComplications and deaths | 6.73 (0 to 13.46) · 669 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative sepsis rateComplications and deaths | 7.58 (3.96 to 11.19) · 654 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative wound dehiscence rateComplications and deaths | 1.59 (0.13 to 3.04) · 496 cases | No different | Jul 2022 – Jun 2024 |
| Pressure ulcer rateComplications and deaths | 0.27 (0 to 0.87) · 7,373 cases | No different | Jul 2022 – Jun 2024 |
| Rate of complications for hip/knee replacement patientsComplications and deaths | 4.1 · 152 cases | None | Apr 2023 – Mar 2025 |
| Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections | 1.08 | No different | Oct 2024 – Sep 2025 |
| Central Line Associated Bloodstream Infection (ICU + select Wards)Infections | 0.542 | No different | Oct 2024 – Sep 2025 |
| MRSA BacteremiaInfections | 0.484 | No different | Oct 2024 – Sep 2025 |
| SSI - Colon SurgeryInfections | 1.565 | No different | Oct 2024 – Sep 2025 |
| Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits | 15.8 · 327 cases | None | Jul 2023 – Jun 2025 |
| Heart failure (HF) 30-Day Readmission RateUnplanned return visits | 24.2 · 703 cases | None | Jul 2023 – Jun 2025 |
| Hospital return days for heart attack patientsUnplanned return visits | 61.1 · 289 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for heart failure patientsUnplanned return visits | 36.3 · 665 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for pneumonia patientsUnplanned return visits | 25.4 · 856 cases | None | Jul 2022 – Jun 2025 |
| Pneumonia (PN) 30-Day Readmission RateUnplanned return visits | 19 · 978 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission after hip/knee replacementUnplanned return visits | 6.3 · 144 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for CABGUnplanned return visits | 12.3 · 46 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits | 21.2 · 135 cases | None | Jul 2023 – Jun 2025 |
| Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits | 13.8 (10.1 to 18.6) · 129 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) · 531 cases | No different | Jan 2024 – Dec 2024 |
What patients said (704 patients answered, 24% of those asked)
| Cleanliness | 3 |
| Nurse communication | 3 |
| Doctor communication | 2 |
| Communication about medicines | 2 |
| Discharge information | 3 |
| Overall hospital rating | 2 |
| Quietness | 1 |
| Recommend hospital | 3 |
| Room was "always" clean | 66% |
| Nurses "always" communicated well | 75% |
| Doctors "always" communicated well | 71% |
| Staff "always" explained | 54% |
| Yes, staff "did" give patients this information | 83% |
| Yes, staff "did" give patients information about help after discharge | 81% |
| Doctors "always" explained things so they could understand | 66% |
| Doctors "always" listened carefully | 69% |
| Doctors "always" treated them with courtesy and respect | 78% |
| Patients who gave a rating of "9" or "10" (high) | 63% |
| Staff "always" explained new medications | 68% |
| Nurses "always" explained things so they could understand | 69% |
| Nurses "always" listened carefully | 73% |
| Nurses "always" treated them with courtesy and respect | 82% |
| "Always" quiet at night | 38% |
| "YES", patients would definitely recommend the hospital | 67% |
| Staff "always" explained possible side effects | 40% |
| Yes, staff "did" give patients information about possible symptoms | 86% |
Original Medicare doctor bills
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
Procedures Medicare counted
| Colonoscopy | 1-10 | None |
| Hernia repair (minimally invasive) | 1-10 | None |
| Removal of skin lesions | 1-10 | None |
| Removal of tissue | 49 | More than 78% of doctors who do this |
| Removal or shaving of skin growth | 1-10 | None |
| Skin biopsy | 1-10 | None |
| Upper gastrointestinal (GI) endoscopy for acid reflux | 16 | More than 47% of doctors who do this |
Money from drug and device companies
$2,681 in 2025
| 2025 | 6 | 14 | None | $2,681 |
| 2024 | 3 | 7 | $1,350 | $1,585 |
| 2023 | 1 | 1 | $1,313 | $1,313 |
Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.
A payment is not proof that care is biased.
| Enterra Medical | None | $1,151 | 3 payments
|
| Medical Device Business Services | Linx Reflux Management System | $1,077 | 6 payments
|
| MIMEDX Group | None | $134 | 1 payment
|
| Intuitive Surgical | Da Vinci Surgical System | $127 | 1 payment
|
| Bayer Healthcare Pharmaceuticals | Kerendia | $118 | 1 payment
|
| Smith+Nephew | Grafix | $73 | 2 payments
|
See all 14 published payments
| Intuitive Surgical | Meals · 2025-12-16 | Da Vinci Surgical System | $127 |
| Medical Device Business Services | Travel · 2025-09-26 | Linx Reflux Management System | $258 |
| Medical Device Business Services | Meals · 2025-09-26 | Linx Reflux Management System | $60 |
| Medical Device Business Services | Travel · 2025-09-26 | Linx Reflux Management System | $251 |
| Medical Device Business Services | Travel · 2025-09-26 | Linx Reflux Management System | $428 |
| Medical Device Business Services | Meals · 2025-09-26 | Linx Reflux Management System | $40 |
| Medical Device Business Services | Meals · 2025-09-26 | Linx Reflux Management System | $40 |
| Smith+Nephew | Meals · 2025-04-17 | Grafix | $47 |
| Enterra Medical | Travel · 2025-04-10 | None | $543 |
| Enterra Medical | Meals · 2025-04-10 | None | $340 |
| Enterra Medical | Meals · 2025-04-10 | None | $268 |
| MIMEDX Group | Meals · 2025-03-13 | None | $134 |
| Smith+Nephew | Meals · 2025-02-28 | Collagenase Santyl | $26 |
| Bayer Healthcare Pharmaceuticals | Meals · 2025-02-22 | Kerendia | $118 |
See earlier years (2024, 2023)
2024: $1,585
| Medtronic | None | $1,350 | 1 payment
|
| Medical Device Business Services | None | $177 | 4 payments
|
| Abbvie | Botox | $58 | 2 payments
|
2023: $1,313
| Medtronic | None | $1,313 | 1 payment
|
Professional record
- NPI
- 1881391001
- Licence
- MA 1014530
- Video visits
- Lists video visits
- Gender
- Female
More record details
- Sole proprietor
- Yes
- Taxonomy
- Surgery (208600000X)
- Mailing address
- 2512 Samaritan Ct Ste G, San Jose, CA, 95124
- NPI first listed
- 2023-02-08
- NPI last updated
- 2025-02-07
- NPI record certified
- 2025-02-07
This is when the NPI record was last certified, not a medical board exam.
Extra NPI addresses: 2500 Hospital Dr Bldg 15-1, Mountain View, CA, 94040