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Bo Sun, MD

Internal Medicine · Stanford

NPI 1366946121

Medicare standing
Clear
Enrolled, allowed to bill and order, not excluded
Plans that list them
5
2 carriers
Office
1
Since medical school
8 years
Duke University School of Medicine, 2018

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

5 plans · 2 carriers

A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Sun’s office at (650) 723-4000 to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.

5 of 5 plans

Plans whose provider directory lists this clinician
SCAN Balance (HMO C-SNP)SCAN Health PlanListedOct 3, 2026
SCAN Classic (HMO)SCAN Health PlanListedOct 3, 2026
SCAN MyChoice (HMO)SCAN Health PlanListedOct 3, 2026
SCAN Strive (HMO C-SNP)SCAN Health PlanListedOct 3, 2026
DualConnect (HMO D-SNP)Santa Clara Family Health PlanListedSep 1, 2026

California Medical Board record

Licence A164146 · Current

Licensed to practise in California · since 2019 · expires 2027-08-31 · Duke University School of Medicine.

No disciplinary actions, convictions, malpractice judgments or citations in this record.

School, training and certification

What this clinician told their state board, medical school and everything before it. Only some states publish this, so nothing here means the state does not say, not that there was no training or certification.

Specialty certification

  • American Board of Internal Medicine - Internal Medicine

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 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.

Every scored measure at Stanford Health Care
Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths5.31 (4.24 to 6.37) · 8,661 casesWorseJul 2022 – Jun 2024
Rate of inpatient admissions for patients receiving outpatient chemotherapyUnplanned return visits14.1 (12.7 to 15.7) · 2,191 casesWorseJan 2024 – Dec 2024
Postoperative respiratory failure rateComplications and deaths4.08 (1.95 to 6.21) · 5,296 casesBetterJul 2022 – Jun 2024
Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections0.317BetterOct 2024 – Sep 2025
Clostridium Difficile (C.Diff)Infections0.446BetterOct 2024 – Sep 2025
SSI - Colon SurgeryInfections0.241BetterOct 2024 – Sep 2025
Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits0.7 (0.6 to 0.9) · 3,348 casesBetterJan 2024 – Dec 2024
Abdominopelvic accidental puncture or laceration rateComplications and deaths1.06 (0.45 to 1.67) · 5,374 casesNo differentJul 2022 – Jun 2024
CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths0.86 (0.72 to 1)No differentJul 2022 – Jun 2024
Death rate among surgical inpatients with serious treatable complicationsComplications and deaths166.09 (137.88 to 194.3) · 470 casesNo differentJul 2022 – Jun 2024
Death rate for CABG surgery patientsComplications and deaths1.1 · 192 casesNoneJul 2022 – Jun 2025
Death rate for COPD patientsComplications and deaths6.4 · 146 casesNoneJul 2022 – Jun 2025
Death rate for heart attack patientsComplications and deaths9.7 · 253 casesNoneJul 2022 – Jun 2025
Death rate for heart failure patientsComplications and deaths6.3 · 880 casesNoneJul 2022 – Jun 2025
Death rate for pneumonia patientsComplications and deaths10.3 · 935 casesNoneJul 2022 – Jun 2025
Death rate for stroke patientsComplications and deaths8.7 · 501 casesNoneJul 2023 – Jun 2025
Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths2.1 · 7,730 casesNoneJul 2024 – Jun 2025
Iatrogenic pneumothorax rateComplications and deaths0.13 (0 to 0.27) · 20,799 casesNo differentJul 2022 – Jun 2024
In-hospital fall-associated fracture rateComplications and deaths0.28 (0.14 to 0.43) · 23,182 casesNo differentJul 2022 – Jun 2024
Postoperative acute kidney injury requiring dialysis rateComplications and deaths0.94 (0.2 to 1.68) · 5,694 casesNo differentJul 2022 – Jun 2024
Postoperative hemorrhage or hematoma rateComplications and deaths2.36 (1.54 to 3.19) · 7,846 casesNo differentJul 2022 – Jun 2024
Postoperative sepsis rateComplications and deaths5.2 (3.76 to 6.64) · 5,603 casesNo differentJul 2022 – Jun 2024
Postoperative wound dehiscence rateComplications and deaths1.38 (0.23 to 2.53) · 2,211 casesNo differentJul 2022 – Jun 2024
Pressure ulcer rateComplications and deaths0.52 (0.21 to 0.83) · 19,915 casesNo differentJul 2022 – Jun 2024
Rate of complications for hip/knee replacement patientsComplications and deaths3.6 · 416 casesNoneApr 2023 – Mar 2025
Central Line Associated Bloodstream Infection (ICU + select Wards)Infections0.869No differentOct 2024 – Sep 2025
MRSA BacteremiaInfections0.857No differentOct 2024 – Sep 2025
SSI - Abdominal HysterectomyInfections0.368No differentOct 2024 – Sep 2025
Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits16.2 · 247 casesNoneJul 2023 – Jun 2025
Heart failure (HF) 30-Day Readmission RateUnplanned return visits20.5 · 1,021 casesNoneJul 2023 – Jun 2025
Hospital return days for heart attack patientsUnplanned return visits47.8 · 258 casesNoneJul 2022 – Jun 2025
Hospital return days for heart failure patientsUnplanned return visits-1.6 · 990 casesNoneJul 2022 – Jun 2025
Hospital return days for pneumonia patientsUnplanned return visits20.8 · 976 casesNoneJul 2022 – Jun 2025
Pneumonia (PN) 30-Day Readmission RateUnplanned return visits16.5 · 959 casesNoneJul 2023 – Jun 2025
Rate of emergency department (ED) visits for patients receiving outpatient chemotherapyUnplanned return visits5.2 (4.4 to 6.2) · 2,191 casesNo differentJan 2024 – Dec 2024
Rate of readmission after hip/knee replacementUnplanned return visits5.1 · 425 casesNoneJul 2023 – Jun 2025
Rate of readmission for CABGUnplanned return visits9.6 · 158 casesNoneJul 2023 – Jun 2025
Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits19.6 · 183 casesNoneJul 2023 – Jun 2025
Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits12.7 (10.4 to 15.4) · 4,578 casesNo differentJan 2022 – Dec 2024

What patients said (6,810 patients answered, 25% of those asked)

Patient survey stars by topic at Stanford Health Care
Cleanliness4
Nurse communication4
Doctor communication4
Communication about medicines3
Discharge information4
Overall hospital rating4
Quietness2
Recommend hospital5
Share of patients giving the best answer at Stanford Health Care
Room was "always" clean75%
Nurses "always" communicated well82%
Doctors "always" communicated well81%
Staff "always" explained63%
Yes, staff "did" give patients this information89%
Yes, staff "did" give patients information about help after discharge89%
Doctors "always" explained things so they could understand76%
Doctors "always" listened carefully80%
Doctors "always" treated them with courtesy and respect87%
Patients who gave a rating of "9" or "10" (high)79%
Staff "always" explained new medications76%
Nurses "always" explained things so they could understand77%
Nurses "always" listened carefully79%
Nurses "always" treated them with courtesy and respect88%
"Always" quiet at night53%
"YES", patients would definitely recommend the hospital83%
Staff "always" explained possible side effects50%
Yes, staff "did" give patients information about possible symptoms90%

Original Medicare doctor bills

$75,455

Medicare paid this office $75,455 for 195 people.

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

Largest Original Medicare bills
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes146$49,169$106
Initial hospital care with moderate level of medical decision making at least 75 minutes56$8,569$150
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes59$8,400$70
Hospital discharge day management, more than 30 minutes60$6,375$105
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes13$1,514$108
See all 6 services
Every Original Medicare service billed
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes146$49,169$106
Initial hospital care with moderate level of medical decision making at least 75 minutes56$8,569$150
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes59$8,400$70
Hospital discharge day management, more than 30 minutes60$6,375$105
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes13$1,514$108
Hospital discharge day management, 30 minutes or less15$1,112$74

Who their Medicare patients are

195 Original Medicare patients in 2024. Average age 75 · Under 65 13% · 85 and older 23% · Women 57% · Also on Medicaid 52% · Health risk score 3.12. Sicker patients than 9 in 10 peers; the typical internal medicine clinician is at 1.76.

Conditions among them: High blood pressure 75% · Coronary heart disease 49% · Diabetes 46% · Heart failure 46% · Chronic kidney disease 45% · Atrial fibrillation 43% · Depression 38% · Dementia 37% · COPD 31% · Cancer 23% · Stroke 23%.

The office billed $301,028, Medicare allowed $95,493 and paid $75,455; for 737 services of 9 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

Original Medicare by year
2024195737753.12$301,028$75,455
2023182692743.66$284,479$73,117
2022232807742.85$336,931$83,267
2021131417742.45$158,932$41,042

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

Original Medicare services billed in 2023
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes128$44,475$105
Initial hospital care with moderate level of medical decision making at least 75 minutes70$10,933$154
Hospital discharge day management, more than 30 minutes76$8,017$104
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes41$6,451$70

2022: 4 services

Original Medicare services billed in 2022
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes177$51,658$92
Initial hospital care with moderate level of medical decision making at least 75 minutes98$17,717$179
Hospital discharge day management, more than 30 minutes76$7,488$95
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes15$2,320$64

2021: 5 services

Original Medicare services billed in 2021
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes100$25,386$95
Hospital discharge day management, more than 30 minutes52$5,347$99
Initial hospital care with moderate level of medical decision making at least 75 minutes26$4,761$183
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes30$2,628$66
Follow-up observation care per day, typically 35 minutes11$1,204$100

Medicaid work

$11,709 in 2024

Medicaid paid $11,709 for 318 billed services this clinician did in 2024, up to 21 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.

Largest Medicaid services in 2024
SBSQ HOSPITAL IP/OBS CARE HIGH MDM 50 MINUTES290$10,779
SBSQ HOSPITAL IP/OBS CARE MOD MDM 35 MINUTES28$930
Medicaid work by year
2024318221$11,709
2023494424$14,105
2022718329$25,158
2021233218$6,368
See the largest Medicaid services in earlier years

2023

Largest Medicaid services in 2023
SBSQ HOSPITAL IP/OBS CARE HIGH MDM 50 MINUTES348$9,444
SBSQ HOSPITAL IP/OBS CARE MOD MDM 35 MINUTES84$2,258
1ST HOSP IP/OBS HIGH 7526$1,551
Hospital inpatient or observation discharge day management; more than 30 minutes on the date of the encounter36$851

2022

Largest Medicaid services in 2022
SBSQ HOSPITAL IP/OBS CARE HIGH MDM 50 MINUTES638$21,719
1ST HOSP IP/OBS HIGH 7540$2,074
Hospital inpatient or observation discharge day management; more than 30 minutes on the date of the encounter40$1,365

2021

Largest Medicaid services in 2021
SBSQ HOSPITAL IP/OBS CARE HIGH MDM 50 MINUTES209$5,436
SBSQ HOSPITAL IP/OBS CARE MOD MDM 35 MINUTES24$932

Drugs they prescribed that Part D paid

$9,087

Pharmacies billed $9,087 in 2024.

This is pharmacy cost, not the office bill, and not what patients paid.

26 generic and fewer than 11 brand-name prescriptions · $9,087 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.

Year by year

Part D prescribing by year
20244217NoneNone$9,087
202343200% (0)None$3,280
2022134260% (0)None$9,618
202134754NoneNone$38,330
202040356None16%$53,423
201913None0% (0)0%$503

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

See the drugs prescribed each year

2022: 4 drugs

Part D drugs prescribed in 2022
Gabapentin16$451$28
Albuterol Sulfate Hfa11$284$26
Amlodipine Besylate11$182$17
Atorvastatin12$136$11

2021: 5 drugs

Part D drugs prescribed in 2021
Betamethasone Diprop Augmented23$1,802$78
Levothyroxine17$609$36
Atorvastatin23$328$14
Amlodipine Besylate25$311$12
Gabapentin12$246$20

2020: 9 drugs

Part D drugs prescribed in 2020
Betamethasone Diprop Augmented25$1,950$78
Ultra-Fine Nano Pen Needle11$1,100$100
Atorvastatin25$473$19
Levothyroxine11$317$29
Prochlorperazine Maleate12$259$22
Fluticasone Propionate18$186$10
Amlodipine Besylate15$122$8
Gabapentin11$120$11
Lisinopril21$93$4

Money from drug and device companies

$18 in 2024

Industry payments by year
202411None$18
202311None$30

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

A payment is not proof that care is biased.

Payments by company
Verrica PharmaceuticalsYcanth$18
1 payment
  • Meals for Ycanth · 2024-01-12 · $18
See the published payment
Every published payment
Verrica PharmaceuticalsMeals · 2024-01-12Ycanth$18
See earlier years (2023)

2023: $30

Payments by company in 2023
Boehringer Ingelheim PharmaceuticalsSpevigo$30
1 payment
  • Meals for Spevigo · 2023-03-08 · $30

Professional record

NPI
1366946121
Licence
CA A164146California A164146: Current · expires 2027-08-31
Trained
Duke University School of Medicine, 2018 · 8 years ago
Gender
Male
More record details
Sole proprietor
No
Taxonomy
Internal medicine (207R00000X)
Mailing address
300 Pasteur Drive, Lane 154, Stanford, CA, 94305
NPI first listed
2018-03-19
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.