Mike Tzuhen Wei, MD

Offices

1 location · Stanford Health Care · 3,152 clinicians in this group

Looking this up.

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. Wei’s office at (650) 723-4000 to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.

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Plans whose provider directory lists this clinician

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 A150927 · Current

Licensed to practise in California · since 2017 · expires 2026-12-31 · Cornell University Medical College.

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 it
Overall 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.

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Every scored measure at Stanford Health Care

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)

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Patient survey stars by topic at Stanford Health Care

Cleanliness	4
Nurse communication	4
Doctor communication	4
Communication about medicines	3
Discharge information	4
Overall hospital rating	4
Quietness	2
Recommend hospital	5

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Share of patients giving the best answer at Stanford Health Care

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

$117,358

Medicare paid this office $117,358 for 336 people.

This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.

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Largest Original Medicare bills

Long return visit (40+ min)	90	$23,153	$156
Return visit (30+ min)	120	$20,116	$111
Removal of polyps or growths of large bowel using an endoscope with mechanical snare	69	$16,285	$233
New patient visit (45+ min)	61	$7,951	$130
New patient visit (60+ min)	36	$6,286	$175

See all 14 services

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Every Original Medicare service billed

Long return visit (40+ min)	90	$23,153	$156
Return visit (30+ min)	120	$20,116	$111
Removal of polyps or growths of large bowel using an endoscope with mechanical snare	69	$16,285	$233
New patient visit (45+ min)	61	$7,951	$130
New patient visit (60+ min)	36	$6,286	$175
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	60	$5,515	$89
Initial hospital care with moderate level of medical decision making at least 75 minutes	26	$4,183	$149
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes	27	$3,960	$116
Removal of polyps or growths of large bowel using an endoscope with mechanical snare	21	$3,622	$172
Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's	119	$2,423	$15
Short return visit (20+ min)	25	$2,018	$72
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	22	$1,863	$81
Biopsy of large bowel using a flexible endoscope	32	$1,716	$52
Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito	54	$271	$5

Procedures Medicare counted

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Procedure volume Medicare published

Colonoscopy	137	More than 87% of doctors who do this
Upper gastrointestinal (GI) endoscopy for acid reflux	153	More than 85% of doctors who do this

Who their Medicare patients are

336 Original Medicare patients in 2024. Average age 72 · Under 65 12% · 85 and older 12% · Women 49% · Also on Medicaid 32% · Health risk score 1.63. Above the middle of the specialty; the typical gastroenterology clinician is at 1.42.

Conditions among them: High blood pressure 72% · Coronary heart disease 32% · Diabetes 30% · Atrial fibrillation 25% · Chronic kidney disease 23% · Cancer 22% · Heart failure 20% · Depression 18% · COPD 14% · Dementia 9% · Stroke 8%.

The office billed $1,147,829, Medicare allowed $151,588 and paid $117,358; for 1,073 services of 46 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

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Original Medicare by year

2024	336	1,073	72	1.63	$1,147,829	$117,358
2023	323	860	72	1.91	$778,070	$90,539
2022	48	87	73	1.51	$77,239	$8,673

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: 17 services

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Original Medicare services billed in 2023

Initial hospital care with straightforward or low-level medical decision making at least 55 minutes	82	$12,378	$117
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes	49	$11,577	$106
Removal of polyps or growths of large bowel using an endoscope with mechanical snare	48	$10,855	$226
Return visit (30+ min)	76	$9,268	$86
New patient visit (45+ min)	79	$8,404	$106
Long return visit (40+ min)	38	$6,170	$112
Initial hospital care with moderate level of medical decision making at least 75 minutes	32	$5,509	$157
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	31	$2,593	$84
Short return visit (20+ min)	37	$2,581	$57
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes	13	$1,852	$71
Biopsy of large bowel using a flexible endoscope	29	$1,818	$63
New patient visit (60+ min)	13	$1,624	$125
Biopsy of large bowel using a flexible endoscope	11	$1,338	$122
Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope	13	$1,272	$85
Hospital discharge day management, more than 30 minutes	13	$1,256	$97
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope	12	$1,244	$104
Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito	44	$206	$5

2022: 1 service

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Original Medicare services billed in 2022

Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito	15	$65	$4

Medicaid work

$55,112 in 2024

Medicaid paid $55,112 for 561 billed services this clinician did in 2024, up to 28 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.

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Largest Medicaid services in 2024

COLONOSCOPY W/LESION REMOVAL	67	$18,283
Upper gastrointestinal endoscopy with biopsy	105	$13,135
Return visit (30+ min)	137	$10,274
TISSUE EXAM BY PATHOLOGIST	108	$6,871
Long return visit (40+ min)	56	$5,937
Fentanyl citrate injection	88	$611

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Medicaid work by year

2024	561	6	28	$55,112
2023	326	7	23	$20,310

See the largest Medicaid services in earlier years

2023

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Largest Medicaid services in 2023

Return visit (30+ min)	155	$7,546
New patient visit (45+ min)	77	$6,783
Upper gastrointestinal endoscopy with biopsy	15	$2,821
TISSUE EXAM BY PATHOLOGIST	17	$1,318
New patient visit (30+ min)	12	$850
SBSQ HOSPITAL IP/OBS CARE HIGH MDM 50 MINUTES	37	$616
Short return visit (20+ min)	13	$376

Drugs they prescribed that Part D paid

$135,844

Pharmacies billed $135,844 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 616) in 2024. At or below the middle of the specialty; the typical gastroenterology clinician is at 0%.

490 generic and 126 brand-name prescriptions · $135,844 in drug cost · 29 antibiotic prescriptions to 18 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.

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Largest Part D drug costs

Linzess	26	$21,497	$827
Dexlansoprazole Dr	30	$7,194	$240
Esomeprazole Magnesium	53	$6,453	$122
Sucralfate	13	$3,359	$258
Colesevelam	12	$1,614	$134

See all 12 drugs

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Every Part D drug this clinician prescribed

Linzess	26	$21,497	$827
Dexlansoprazole Dr	30	$7,194	$240
Esomeprazole Magnesium	53	$6,453	$122
Sucralfate	13	$3,359	$258
Colesevelam	12	$1,614	$134
Peg 3350-Electrolyte	76	$1,609	$21
Gavilyte-G	70	$1,317	$19
Omeprazole	102	$1,271	$12
Sod Sulf-Potass Sulf-Mag Sulf	16	$1,218	$76
Famotidine	83	$1,115	$13
Peg-3350 and Electrolytes	27	$546	$20
Pantoprazole	16	$203	$13

Year by year

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Part D prescribing by year

2024	616	282	0% (0)	20%	$135,844
2023	392	190	0% (0)	15%	$40,025
2022	180	74	None	None	$24,809
2021	34	14	0% (0)	38%	$16,035
2020	14	None	0% (0)	None	$1,999
2019	39	23	None	None	$2,642

Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.

See the drugs prescribed each year

2023: 6 drugs

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Part D drugs prescribed in 2023

Mesalamine	14	$5,359	$383
Omeprazole	96	$1,815	$19
Peg 3350-Electrolyte	69	$1,551	$22
Gavilyte-G	51	$991	$19
Famotidine	38	$822	$22
Peg-3350 and Electrolytes	11	$234	$21

2022: 4 drugs

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Part D drugs prescribed in 2022

Ampicillin-Sulbactam	18	$2,916	$162
Peg 3350-Electrolyte	20	$442	$22
Pantoprazole	11	$239	$22
Famotidine	12	$166	$14

Money from drug and device companies

$174,823 in 2025

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Industry payments by year

2025	1	10	$174,823	$174,823
2024	2	14	$131,763	$131,763
2023	4	13	$38,300	$41,395
2022	4	5	None	$33,649
2021	1	1	None	$122

Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.

A payment is not proof that care is biased.

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Payments by company

CapsoVision	Capsocam Colon	$174,823	10 payments Consulting for Capsocam Colon · 2025-12-18 · $33,431 Consulting for Capsocam Colon · 2025-12-05 · $28,279 Consulting for Capsocam Colon · 2025-10-24 · $17,096 Consulting for Capsocam Colon · 2025-08-27 · $2,191 Consulting for Capsocam Colon · 2025-08-06 · $14,098 Consulting for Capsocam Colon · 2025-08-06 · $3,190 Consulting for Capsocam Colon · 2025-07-09 · $21,718 Consulting for Capsocam Colon · 2025-05-21 · $30,033 Consulting for Capsocam Colon · 2025-04-03 · $23,588 Consulting for Capsocam Colon · 2025-01-02 · $1,200

See all 10 published payments

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Every published payment

CapsoVision	Consulting · 2025-12-18	Capsocam Colon	$33,431
CapsoVision	Consulting · 2025-12-05	Capsocam Colon	$28,279
CapsoVision	Consulting · 2025-10-24	Capsocam Colon	$17,096
CapsoVision	Consulting · 2025-08-27	Capsocam Colon	$2,191
CapsoVision	Consulting · 2025-08-06	Capsocam Colon	$14,098
CapsoVision	Consulting · 2025-08-06	Capsocam Colon	$3,190
CapsoVision	Consulting · 2025-07-09	Capsocam Colon	$21,718
CapsoVision	Consulting · 2025-05-21	Capsocam Colon	$30,033
CapsoVision	Consulting · 2025-04-03	Capsocam Colon	$23,588
CapsoVision	Consulting · 2025-01-02	Capsocam Colon	$1,200

See earlier years (2024, 2023, 2022, 2021)

2024: $131,763

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Payments by company in 2024

CapsoVision	Capsocam Colon	$124,163	8 payments Consulting for Capsocam Colon · 2024-12-30 · $12,210 Consulting for Capsocam Colon · 2024-12-11 · $20,775 Consulting for Capsocam Colon · 2024-11-20 · $25,590 Consulting for Capsocam Colon · 2024-10-09 · $15,840 Consulting for Capsocam Colon · 2024-09-11 · $18,885 Consulting for Capsocam Colon · 2024-08-14 · $17,363 Consulting for Capsocam Colon · 2024-06-05 · $9,263 Consulting for Capsocam Colon · 2024-05-23 · $4,238
Neptune Medical	None	$7,600	1 payment Consulting · 2024-10-30 · $7,600

2023: $41,395

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Payments by company in 2023

CapsoVision	Capsocam Colon	$35,100	8 payments Consulting for Capsocam Colon · 2023-12-06 · $5,550 Consulting for Capsocam Colon · 2023-11-02 · $4,050 Consulting for Capsocam Colon · 2023-10-04 · $3,600 Consulting for Capsocam Colon · 2023-08-10 · $6,300 Consulting for Capsocam Colon · 2023-07-12 · $2,550 Consulting for Capsocam Colon · 2023-06-14 · $825 Consulting for Capsocam Colon · 2023-06-14 · $2,475 Consulting for Capsocam Colon · 2023-04-05 · $9,750
Neptune Medical	None	$3,200	1 payment Consulting · 2023-10-18 · $3,200
Endogastric Solutions	Esophyx	$2,160	2 payments Meals for Esophyx · 2023-02-28 · $123 Travel for Esophyx · 2023-02-28 · $2,037
Ovesco Endoscopy USA	None	$935	1 payment Travel · 2023-09-22 · $935

2022: $33,649

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Payments by company in 2022

Conmed	Conmed	$33,333	1 payment Grant for Conmed · 2022-03-22 · $33,333
Olympus America	Endocuff Vision	$149	1 payment Meals for Endocuff Vision · 2022-05-18 · $149
Boston Scientific	Exalt Model D	$136	2 payments Meals for Exalt Model D · 2022-05-22 · $116 Meals for Axios · 2022-02-15 · $20
Apollo Endosurgery US	X-Tack Endoscopic Helix Tacking System	$31	1 payment Meals for X-Tack Endoscopic Helix Tacking System · 2022-06-06 · $31

2021: $122

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Payments by company in 2021

AbbVie	Humira	$122	1 payment Meals for Humira · 2021-09-30 · $122

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: 1417311408
Licence: CA A150927California A150927: Current · expires 2026-12-31
Group: Stanford Health Care
Video visits: Lists video visits
Gender: Male

More record details

Sole proprietor: No
Taxonomy: Federal specialty code 207RG0100X (207RG0100X); Internal medicine (207R00000X)
Mailing address: 300 Pasteur Dr, Stanford, CA, 94305
NPI first listed: 2016-04-06
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.