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Aglaia Kaissa De Boer, MD

Pulmonary Disease · Stanford

NPI 1922421569

Medicare standing
Clear
Enrolled, allowed to bill and order, not excluded
Plans that list them
17
3 carriers
Office
1

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

17 plans · 3 carriers

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

17 of 17 plans

Plans whose provider directory lists this clinician
Alignment Health BreathEasy (HMO C-SNP)Alignment Health PlanListedOct 3, 2026
Alignment Health Clarity (HMO C-SNP)Alignment Health PlanListedOct 3, 2026
Alignment Health Harmony (HMO)Alignment Health PlanListedOct 3, 2026
Alignment Health Heart & Diabetes (HMO C-SNP)Alignment Health PlanListedOct 3, 2026
Alignment Health Heart & Diabetes CalPlus (HMO C-SNP)Alignment Health PlanListedOct 3, 2026
Alignment Health Heart & Diabetes Care (HMO C-SNP)Alignment Health PlanListedSep 28, 2026
Alignment Health Heart & Diabetes Choice (HMO C-SNP)Alignment Health PlanListedSep 28, 2026
Alignment Health Honor+ Plan (HMO)Alignment Health PlanListedOct 3, 2026
Alignment Health My Choice CalCare (HMO)Alignment Health PlanListedOct 3, 2026
Alignment Health Silicon (HMO C-SNP)Alignment Health PlanListedOct 3, 2026
Alignment Health smartHMO (HMO)Alignment Health PlanListedOct 3, 2026
Alignment Health the ONE (HMO)Alignment Health PlanListedOct 3, 2026
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 A128593 · Current

Licensed to practise in California · since 2014 · expires 2027-03-31 · University of Ottawa School 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 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

$43,042

Medicare paid this office $43,042 for 309 people.

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

Largest Original Medicare bills
Long return visit (40+ min)90$14,495$121
Return visit (30+ min)77$7,393$79
New patient visit (60+ min)35$5,708$163
Return visit (30+ min)22$3,066$123
Long return visit (40+ min)17$2,778$163
See all 13 services
Every Original Medicare service billed
Long return visit (40+ min)90$14,495$121
Return visit (30+ min)77$7,393$79
New patient visit (60+ min)35$5,708$163
Return visit (30+ min)22$3,066$123
Long return visit (40+ min)17$2,778$163
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes17$1,884$111
New patient visit (45+ min)11$1,095$100
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes12$1,049$70
Short return visit (20+ min)14$774$52
Test to examine how well the lungs exchange gases63$491$8
Test to measure expiratory airflow and volume changes before and after medication administration41$370$9
Test to determine lung volumes using sensors31$327$11
Test to measure expiratory airflow and volume39$282$7

Who their Medicare patients are

309 Original Medicare patients in 2024. Average age 74 · Under 65 8% · 85 and older 10% · Women 53% · Also on Medicaid 21% · Health risk score 2.20. Above the middle of the specialty; the typical pulmonary disease clinician is at 2.13.

Conditions among them: High blood pressure 74% · Coronary heart disease 40% · COPD 34% · Diabetes 30% · Chronic kidney disease 27% · Heart failure 26% · Atrial fibrillation 26% · Cancer 21% · Depression 18% · Stroke 8% · Dementia 6%.

The office billed $146,112, Medicare allowed $57,103 and paid $43,042; for 574 services of 23 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
2024309574742.20$146,112$43,042
2023318527741.98$116,052$36,564
2022416773732.01$189,142$52,328
2021331638731.94$116,494$51,324
2020272542732.04$121,326$35,794
2019130223721.90$23,669$11,127

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: 10 services

Original Medicare services billed in 2023
Long return visit (40+ min)96$15,188$126
New patient visit (60+ min)39$6,388$164
Return visit (30+ min)66$5,609$76
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes17$1,532$73
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes12$1,435$120
Short return visit (20+ min)20$1,253$60
Test to examine how well the lungs exchange gases65$498$8
Test to measure expiratory airflow and volume changes before and after medication administration46$403$9
Test to determine lung volumes using sensors33$339$10
Test to measure expiratory airflow and volume45$335$7

2022: 10 services

Original Medicare services billed in 2022
Long return visit (40+ min)123$20,753$125
Return visit (30+ min)91$9,222$77
New patient visit (60+ min)44$7,669$174
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes29$2,602$65
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes26$2,292$88
Short return visit (20+ min)29$1,505$52
Test to examine how well the lungs exchange gases94$731$7
Test to measure expiratory airflow and volume changes before and after medication administration65$566$9
Test to determine lung volumes using sensors48$479$10
Test to measure expiratory airflow and volume59$411$7

2021: 10 services

Original Medicare services billed in 2021
Long return visit (40+ min)94$18,117$147
Return visit (30+ min)87$11,809$105
New patient visit (60+ min)35$6,890$197
New patient visit (45+ min)32$4,752$149
Short return visit (20+ min)40$2,862$67
New patient visit (30+ min)13$1,037$80
Test to examine how well the lungs exchange gases80$644$8
Test to measure expiratory airflow and volume changes before and after medication administration49$449$9
Test to measure expiratory airflow and volume56$412$7
Test to determine lung volumes using sensors37$402$11

2020: 11 services

Original Medicare services billed in 2020
Long return visit (40+ min)67$9,239$105
Return visit (30+ min)69$6,906$73
New patient visit (60+ min)45$6,335$141
New patient visit (45+ min)25$2,887$115
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes17$1,564$68
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes12$1,513$126
Short return visit (20+ min)19$907$48
Test to examine how well the lungs exchange gases63$512$8
Test to measure expiratory airflow and volume changes before and after medication administration33$385$12
Test to measure expiratory airflow and volume50$381$8
Test to determine lung volumes using sensors22$238$11

2019: 7 services

Original Medicare services billed in 2019
New patient visit (60+ min)27$4,052$150
New patient visit (45+ min)22$2,528$115
Long return visit (40+ min)15$1,691$99
Test to measure expiratory airflow and volume changes before and after medication administration33$390$12
Test to examine how well the lungs exchange gases45$369$8
Test to measure expiratory airflow and volume35$266$8
Test to determine lung volumes using sensors23$256$11

Medicaid work

$77 in 2024

Medicaid paid $77 for 14 billed services this clinician did in 2024, up to 14 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
Diffusing capacity14$77
Medicaid work by year
202414114$77
202339215$176
202238213$301
202126214$181
See the largest Medicaid services in earlier years

2023

Largest Medicaid services in 2023
Diffusing capacity27$117
EVALUATION OF WHEEZING12$59

2022

Largest Medicaid services in 2022
Diffusing capacity26$153
EVALUATION OF WHEEZING12$148

2021

Largest Medicaid services in 2021
Spirometry, including graphic record, total and timed vital capacity, expiratory flow rate measurement(s), with or without maximal voluntary ventilation12$94
Diffusing capacity14$87

Drugs they prescribed that Part D paid

$2,637,456

Pharmacies billed $2,637,456 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 584) in 2024. At or below the middle of the specialty; the typical pulmonary disease clinician is at 0%.

269 generic and 315 brand-name prescriptions · $2,637,456 in drug cost · 20 antibiotic prescriptions to 13 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.

Largest Part D drug costs
Ofev205$2,492,220$12,157
Pirfenidone47$86,341$1,837
Breo Ellipta24$11,439$477
Mycophenolate Mofetil83$6,088$73
Albuterol Sulfate Hfa35$1,556$44
See all 10 drugs
Every Part D drug this clinician prescribed
Ofev205$2,492,220$12,157
Pirfenidone47$86,341$1,837
Breo Ellipta24$11,439$477
Mycophenolate Mofetil83$6,088$73
Albuterol Sulfate Hfa35$1,556$44
Azathioprine16$783$49
Fluticasone Propionate28$267$10
Prednisone25$216$9
Omeprazole15$191$13
Sulfamethoxazole-Trimethoprim13$22$2

Year by year

Part D prescribing by year
20245841140% (0)54%$2,637,456
2023528920% (0)59%$2,679,302
2022551940% (0)58%$2,708,162
2021595900% (0)57%$2,767,028
2020328770% (0)45%$846,796
201996350% (0)31%$59,372

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

See the drugs prescribed each year

2023: 12 drugs

Part D drugs prescribed in 2023
Ofev191$2,442,266$12,787
Pirfenidone48$154,165$3,212
Breo Ellipta21$12,203$581
Trelegy Ellipta17$11,878$699
Mycophenolate Mofetil45$7,643$170
Mycophenolic Acid11$6,195$563
Ventolin Hfa19$1,791$94
Albuterol Sulfate Hfa26$1,080$42
Azathioprine19$777$41
Omeprazole20$507$25
Benzonatate11$311$28
Prednisone16$170$11

2022: 12 drugs

Part D drugs prescribed in 2022
Ofev201$2,360,972$11,746
Pirfenidone20$163,784$8,189
Esbriet14$102,832$7,345
Mycophenolate Mofetil61$20,014$328
Breo Ellipta15$9,952$663
Symbicort19$9,879$520
Incruse Ellipta14$8,418$601
Azathioprine23$1,363$59
Albuterol Sulfate Hfa19$891$47
Omeprazole24$233$10
Prednisone26$231$9
Sulfamethoxazole-Trimethoprim12$63$5

2021: 14 drugs

Part D drugs prescribed in 2021
Ofev207$2,377,313$11,485
Esbriet31$309,503$9,984
Mycophenolate Mofetil85$13,969$164
Breo Ellipta17$9,529$561
Spiriva14$8,174$584
Wixela Inhub18$7,520$418
Symbicort15$6,316$421
Azathioprine22$961$44
Albuterol Sulfate Hfa13$565$43
Fluticasone Propionate26$397$15
Pantoprazole12$385$32
Prednisone31$264$9
Omeprazole17$225$13
Sulfamethoxazole-Trimethoprim20$76$4

2020: 9 drugs

Part D drugs prescribed in 2020
Ofev47$524,581$11,161
Esbriet22$265,987$12,090
Advair Diskus12$7,612$634
Incruse Ellipta14$7,190$514
Mycophenolate Mofetil58$5,848$101
Fluticasone Propionate25$424$17
Prednisone22$191$9
Pantoprazole17$176$10
Sulfamethoxazole-Trimethoprim16$123$8

2019: 2 drugs

Part D drugs prescribed in 2019
Prednisone14$235$17
Fluticasone Propionate11$192$17

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
1922421569
Licence
CA A128593California A128593: Current · expires 2027-03-31
Video visits
Lists video visits
Gender
Female
More record details
Sole proprietor
No
Taxonomy
Federal specialty code 207RP1001X (207RP1001X); Internal medicine (207R00000X)
Mailing address
300 Pasteur Dr, Palo Alto, CA, 94304
NPI first listed
2014-02-03
NPI last updated
2024-04-28
NPI record certified
2024-04-28

This is when the NPI record was last certified, not a medical board exam.

Extra NPI addresses: 505 Parnassus Ave, San Francisco, CA, 94143