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Sybil N Zachariah, MD

Emergency Medicine · Burlingame

NPI 1508202094

Medicare standing
Clear
Enrolled, allowed to bill and order, not excluded
Plans that list them
Not verified
Not the same as out of network.
Office
1
Since medical school
13 years
Un of California, Irvine, College of Medicine, 2013

Offices

1 location · Mills-Peninsula Emergency Medical Associates, Inc · 28 clinicians in this group

Looking this up.

Hospitals listed: Mills-Peninsula Medical Center. That is not proof they admit you there this week.

Plan participation

Not verified

We could not verify current plan participation for this doctor. This does not mean they are out of network. Call Dr. Zachariah’s office at (650) 696-5500 to ask if they take your plan before you enroll.

California Medical Board record

Licence A131673 · Current

Licensed to practise in California · since 2014 · expires 2027-11-30 · David Geffen School of Medicine at UCLA.

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 Emergency Medicine - Emergency Medicine

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.

  • Peninsula Medical CenterBurlingame, CAAcute Care Hospital · Voluntary non-profit - Private · Has an emergency department · Birthing-friendlyPart of Sutter Health, which runs 27 hospitals in 2 statesPatients rate it 4 of 5 · 78% would definitely recommend it
    Overall rating: 5 of 5 starsBetter than the national rate — Catheter Associated Urinary Tract Infections (ICU + select Wards): 0.139, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.242, Oct 2024 – Sep 2025
See every measure and the patient survey for Peninsula Medical Center

Behind the star rating — Deaths: 2 better, 6 the same, 0 worse of 8 measures. Safety: 2 better, 5 the same, 0 worse of 7 measures. Readmissions: 0 better, 10 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.

Every scored measure at Peninsula Medical Center
Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections0.139BetterOct 2024 – Sep 2025
Clostridium Difficile (C.Diff)Infections0.242BetterOct 2024 – Sep 2025
Abdominopelvic accidental puncture or laceration rateComplications and deaths1.21 (0.27 to 2.15) · 1,258 casesNo differentJul 2022 – Jun 2024
CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths0.81 (0.51 to 1.1)No differentJul 2022 – Jun 2024
Death rate among surgical inpatients with serious treatable complicationsComplications and deaths155.44 (112.67 to 198.21) · 90 casesNo differentJul 2022 – Jun 2024
Death rate for CABG surgery patientsComplications and deaths2.5 · 32 casesNoneJul 2022 – Jun 2025
Death rate for COPD patientsComplications and deaths7.1 · 82 casesNoneJul 2022 – Jun 2025
Death rate for heart attack patientsComplications and deaths10 · 188 casesNoneJul 2022 – Jun 2025
Death rate for heart failure patientsComplications and deaths9 · 473 casesNoneJul 2022 – Jun 2025
Death rate for pneumonia patientsComplications and deaths14.8 · 342 casesNoneJul 2022 – Jun 2025
Death rate for stroke patientsComplications and deaths9.4 · 485 casesNoneJul 2023 – Jun 2025
Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths2.9 · 3,730 casesNoneJul 2024 – Jun 2025
Iatrogenic pneumothorax rateComplications and deaths0.2 (0 to 0.4) · 6,904 casesNo differentJul 2022 – Jun 2024
In-hospital fall-associated fracture rateComplications and deaths0.21 (0.02 to 0.4) · 7,052 casesNo differentJul 2022 – Jun 2024
Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths3.41 (1.43 to 5.39) · 1,695 casesNo differentJul 2022 – Jun 2024
Postoperative acute kidney injury requiring dialysis rateComplications and deaths1.72 (0.17 to 3.28) · 665 casesNo differentJul 2022 – Jun 2024
Postoperative hemorrhage or hematoma rateComplications and deaths2.11 (0.66 to 3.56) · 1,545 casesNo differentJul 2022 – Jun 2024
Postoperative respiratory failure rateComplications and deaths7.1 (1.3 to 12.9) · 670 casesNo differentJul 2022 – Jun 2024
Postoperative sepsis rateComplications and deaths5.96 (2.63 to 9.29) · 653 casesNo differentJul 2022 – Jun 2024
Postoperative wound dehiscence rateComplications and deaths1.61 (0.15 to 3.08) · 418 casesNo differentJul 2022 – Jun 2024
Pressure ulcer rateComplications and deaths0.14 (0 to 0.78) · 5,539 casesNo differentJul 2022 – Jun 2024
Rate of complications for hip/knee replacement patientsComplications and deaths3.7 · 192 casesNoneApr 2023 – Mar 2025
Central Line Associated Bloodstream Infection (ICU + select Wards)Infections0.215No differentOct 2024 – Sep 2025
MRSA BacteremiaInfections0.263No differentOct 2024 – Sep 2025
SSI - Colon SurgeryInfections0.74No differentOct 2024 – Sep 2025
Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits14.3 · 300 casesNoneJul 2023 – Jun 2025
Heart failure (HF) 30-Day Readmission RateUnplanned return visits19 · 702 casesNoneJul 2023 – Jun 2025
Hospital return days for heart attack patientsUnplanned return visits1.2 · 207 casesNoneJul 2022 – Jun 2025
Hospital return days for heart failure patientsUnplanned return visits-13.6 · 531 casesNoneJul 2022 – Jun 2025
Hospital return days for pneumonia patientsUnplanned return visits24.3 · 343 casesNoneJul 2022 – Jun 2025
Pneumonia (PN) 30-Day Readmission RateUnplanned return visits18.1 · 449 casesNoneJul 2023 – Jun 2025
Rate of emergency department (ED) visits for patients receiving outpatient chemotherapyUnplanned return visits4.5 (2.8 to 7) · 85 casesNo differentJan 2024 – Dec 2024
Rate of inpatient admissions for patients receiving outpatient chemotherapyUnplanned return visits9.6 (6.7 to 13.7) · 85 casesNo differentJan 2024 – Dec 2024
Rate of readmission after hip/knee replacementUnplanned return visits5.7 · 189 casesNoneJul 2023 – Jun 2025
Rate of readmission for CABGUnplanned return visits11 · 45 casesNoneJul 2023 – Jun 2025
Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits20.6 · 117 casesNoneJul 2023 – Jun 2025
Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits13 (9.7 to 17.2) · 584 casesNo differentJan 2022 – Dec 2024
Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits0.9 (0.7 to 1.2) · 764 casesNo differentJan 2024 – Dec 2024

What patients said (523 patients answered, 27% of those asked)

Patient survey stars by topic at Peninsula Medical Center
Cleanliness4
Nurse communication4
Doctor communication4
Communication about medicines3
Discharge information4
Overall hospital rating4
Quietness3
Recommend hospital5
Share of patients giving the best answer at Peninsula Medical Center
Room was "always" clean76%
Nurses "always" communicated well81%
Doctors "always" communicated well80%
Staff "always" explained58%
Yes, staff "did" give patients this information89%
Yes, staff "did" give patients information about help after discharge87%
Doctors "always" explained things so they could understand74%
Doctors "always" listened carefully79%
Doctors "always" treated them with courtesy and respect87%
Patients who gave a rating of "9" or "10" (high)75%
Staff "always" explained new medications72%
Nurses "always" explained things so they could understand77%
Nurses "always" listened carefully79%
Nurses "always" treated them with courtesy and respect88%
"Always" quiet at night54%
"YES", patients would definitely recommend the hospital78%
Staff "always" explained possible side effects44%
Yes, staff "did" give patients information about possible symptoms90%

Original Medicare doctor bills

$65,316

Medicare paid this office $65,316 for 434 people.

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

Largest Original Medicare bills
Emergency department visit with high level of medical decision making219$31,822$142
Critical care, first 30-74 minutes80$14,501$179
Emergency department visit with moderate level of medical decision making105$9,896$93
Initial hospital care with moderate level of medical decision making at least 75 minutes19$2,678$141
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only241$1,785$7
See all 7 services
Every Original Medicare service billed
Emergency department visit with high level of medical decision making219$31,822$142
Critical care, first 30-74 minutes80$14,501$179
Emergency department visit with moderate level of medical decision making105$9,896$93
Initial hospital care with moderate level of medical decision making at least 75 minutes19$2,678$141
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only241$1,785$7
Emergency department visit with low level of medical decision making14$720$51
Electrocardiogram (ecg) 1 to 3 leads with review by physician only119$695$6

Who their Medicare patients are

434 Original Medicare patients in 2024. Average age 79 · Under 65 4% · 85 and older 33% · Women 56% · Also on Medicaid 21% · Health risk score 1.92. At or below the middle of the specialty; the typical emergency medicine clinician is at 2.01.

Conditions among them: High blood pressure 75% · Chronic kidney disease 38% · Diabetes 37% · Coronary heart disease 35% · Atrial fibrillation 34% · Heart failure 31% · Depression 26% · Cancer 22% · Dementia 22% · COPD 20% · Stroke 20%.

The office billed $496,064, Medicare allowed $85,470 and paid $65,316; for 855 services of 28 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
2024434855791.92$496,064$65,316
2023245460791.87$247,231$37,762
2022511982781.71$495,420$83,232
2021387733762.01$378,017$70,162
2020446806771.71$412,197$72,292
2019566941771.85$500,929$83,478
20186301,001742.47$420,724$87,260
2017357503732.08$224,429$48,221
2016153172712.14$89,465$21,037

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: 6 services

Original Medicare services billed in 2023
Emergency department visit with high level of medical decision making103$15,066$146
Critical care, first 30-74 minutes43$8,080$188
Emergency department visit with moderate level of medical decision making66$6,312$94
Initial hospital care with moderate level of medical decision making at least 75 minutes29$4,793$160
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only130$970$7
Electrocardiogram (ecg) 1 to 3 leads with review by physician only53$317$6

2022: 7 services

Original Medicare services billed in 2022
Emergency department visit with high level of medical decision making277$45,823$160
Critical care, first 30-74 minutes59$13,503$229
Emergency department visit with moderate level of medical decision making110$11,433$103
Emergency department visit with low level of medical decision making70$4,422$59
Initial hospital observation care per day, typically 70 minutes13$1,955$150
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only243$1,874$7
Electrocardiogram (ecg) 1 to 3 leads with review by physician only117$701$6

2021: 7 services

Original Medicare services billed in 2021
Emergency department visit with high level of medical decision making194$33,399$169
Critical care, first 30-74 minutes66$15,782$236
Emergency department visit with moderate level of medical decision making66$7,561$110
Initial hospital observation care per day, typically 70 minutes23$4,168$181
Emergency department visit with low level of medical decision making42$2,804$64
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only198$1,723$8
Electrocardiogram (ecg) 1 to 3 leads with review by physician only58$349$6

2020: 6 services

Original Medicare services billed in 2020
Emergency department visit with high level of medical decision making256$41,569$160
Critical care, first 30-74 minutes60$13,946$225
Emergency department visit with moderate level of medical decision making83$8,106$97
Emergency department visit with low level of medical decision making49$2,736$56
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only208$1,956$8
Electrocardiogram (ecg) 1 to 3 leads with review by physician only66$450$7

2019: 6 services

Original Medicare services billed in 2019
Emergency department visit with high level of medical decision making311$48,092$149
Emergency department visit with moderate level of medical decision making122$12,275$99
Critical care, first 30-74 minutes60$11,969$196
Emergency department visit with low level of medical decision making80$4,300$54
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only255$2,220$8
Electrocardiogram (ecg) 1 to 3 leads with review by physician only14$88$6

2018: 7 services

Original Medicare services billed in 2018
Emergency department visit with high level of medical decision making340$51,008$146
Critical care, first 30-74 minutes70$13,634$192
Emergency department visit with moderate level of medical decision making134$12,364$92
Emergency department visit with low level of medical decision making80$3,725$46
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only169$1,358$8
X-ray of chest, 1 view90$763$8
X-ray of chest, 2 views18$158$9

2017: 6 services

Original Medicare services billed in 2017
Emergency department visit with high level of medical decision making187$27,693$145
Emergency department visit with moderate level of medical decision making90$8,542$95
Critical care, first 30-74 minutes24$4,710$196
Emergency department visit with low level of medical decision making34$1,694$50
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only64$501$7
X-ray of chest, 1 view, front26$215$8

2016: 2 services

Original Medicare services billed in 2016
Emergency department visit with high level of medical decision making93$14,256$149
Emergency department visit with moderate level of medical decision making34$3,532$101

Medicaid work

$36,038 in 2024

Medicaid paid $36,038 for 563 billed services this clinician did in 2024, up to 31 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
EMERGENCY DEPT VISIT MOD MDM255$18,405
EMERGENCY DEPARTMENT VISIT HIGH MDM182$16,396
Electrocardiogram, routine ECG with at least 12 leads; interpretation and report only126$1,236
Medicaid work by year
2024563331$36,038
2023393329$23,464
2022974545$53,946
2021658431$36,405
2020798432$45,383
2019891436$53,187
20182,3861391$100,803
See the largest Medicaid services in earlier years

2023

Largest Medicaid services in 2023
EMERGENCY DEPT VISIT MOD MDM182$13,112
EMERGENCY DEPARTMENT VISIT HIGH MDM109$9,388
Electrocardiogram, routine ECG with at least 12 leads; interpretation and report only102$964

2022

Largest Medicaid services in 2022
EMERGENCY DEPARTMENT VISIT HIGH MDM268$22,432
EMERGENCY DEPT VISIT MOD MDM250$17,234
EMERGENCY DEPT VISIT LOW MDM256$12,226
Electrocardiogram, routine ECG with at least 12 leads; interpretation and report only187$1,953
Rhythm ECG, 1-3 leads; interpretation and report only13$101

2021

Largest Medicaid services in 2021
EMERGENCY DEPARTMENT VISIT HIGH MDM195$17,301
EMERGENCY DEPT VISIT LOW MDM186$8,843
EMERGENCY DEPT VISIT MOD MDM128$8,763
Electrocardiogram, routine ECG with at least 12 leads; interpretation and report only149$1,498

2020

Largest Medicaid services in 2020
EMERGENCY DEPARTMENT VISIT HIGH MDM239$21,077
EMERGENCY DEPT VISIT MOD MDM224$15,440
EMERGENCY DEPT VISIT LOW MDM149$7,015
Electrocardiogram, routine ECG with at least 12 leads; interpretation and report only186$1,851

2019

Largest Medicaid services in 2019
EMERGENCY DEPARTMENT VISIT HIGH MDM253$22,651
EMERGENCY DEPT VISIT MOD MDM259$17,945
EMERGENCY DEPT VISIT LOW MDM244$11,184
Electrocardiogram, routine ECG with at least 12 leads; interpretation and report only135$1,407

2018

Largest Medicaid services in 2018
EMERGENCY DEPT VISIT LOW MDM789$29,247
EMERGENCY DEPT VISIT MOD MDM545$23,937
EMERGENCY DEPARTMENT VISIT HIGH MDM279$19,688
Miscellaneous therapeutic items and supplies, retail purchases, not otherwise classified; identify product in "remarks"55$11,645
Service212$7,794
Infectious agent antigen detection by immunoassay with direct optical (ie, visual) observation; Influenza13$2,358
Electrocardiogram, routine ECG with at least 12 leads; interpretation and report only234$2,307
COMPREHENSIVE METABOLIC PANEL55$1,563
Service102$1,212
Service13$645
Blood count; complete (CBC), automated (Hgb, Hct, RBC, WBC and platelet count) and automated differential WBC count48$267
Radiologic examination, chest; single view15$78

Drugs they prescribed that Part D paid

$9,673

Pharmacies billed $9,673 in 2024.

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

Opioids were 11% of their Part D prescriptions (28 of 258) in 2024. At or below the middle of the specialty; the typical emergency medicine clinician is at 12%.

242 generic and fewer than 11 brand-name prescriptions · $9,673 in drug cost · 124 antibiotic prescriptions to 107 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
Cephalexin48$363$7
Cefdinir16$267$17
Amoxicillin-Clavulanate Potass12$153$13
Ondansetron Odt18$133$7
Hydrocodone-Acetaminophen15$61$4
See all 8 drugs
Every Part D drug this clinician prescribed
Cephalexin48$363$7
Cefdinir16$267$17
Amoxicillin-Clavulanate Potass12$153$13
Ondansetron Odt18$133$7
Hydrocodone-Acetaminophen15$61$4
Acetaminophen-Codeine11$56$5
Prednisone16$46$3
Azithromycin13$37$3

Year by year

Part D prescribing by year
202425818811% (28)None$9,673
20231901368% (16)None$4,080
202230623213% (41)5%$7,036
202115311113% (20)8%$7,130
20201701329% (16)None$4,022
201919715412% (23)10%$5,709
201814310215% (22)None$1,948
201711081NoneNone$3,285
20161915NoneNone$443
2015352634% (12)None$1,173

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

See the drugs prescribed each year

2023: 3 drugs

Part D drugs prescribed in 2023
Cephalexin39$385$10
Amoxicillin-Clavulanate Potass12$126$10
Ondansetron Odt13$61$5

2022: 8 drugs

Part D drugs prescribed in 2022
Naloxone13$1,047$81
Cephalexin66$758$11
Amoxicillin-Clavulanate Potass18$308$17
Cefdinir11$258$23
Hydrocodone-Acetaminophen32$159$5
Paxlovid (Eua)14$140$10
Ondansetron Odt12$105$9
Sulfamethoxazole-Trimethoprim12$81$7

2021: 4 drugs

Part D drugs prescribed in 2021
Cephalexin34$420$12
Amoxicillin-Clavulanate Potass11$116$11
Hydrocodone-Acetaminophen16$71$4
Prednisone12$70$6

2020: 3 drugs

Part D drugs prescribed in 2020
Cephalexin29$354$12
Amoxicillin-Clavulanate Potass12$123$10
Ondansetron Odt12$83$7

2019: 4 drugs

Part D drugs prescribed in 2019
Cefdinir32$924$29
Cephalexin21$180$9
Azithromycin11$80$7
Hydrocodone-Acetaminophen15$59$4

2018: 4 drugs

Part D drugs prescribed in 2018
Ondansetron Odt16$178$11
Cephalexin14$129$9
Hydrocodone-Acetaminophen18$81$5
Prednisone13$52$4

Checkups this office reported

Medicare did not publish checkup rates for this clinician.

Medicare’s overall office score
94.9 / 100
Scores the office’s reporting and systems. It is not a grade for how the doctor treats you.

Professional record

NPI
1508202094
Licence
CA A131673California A131673: Current · expires 2027-11-30
Trained
Un of California, Irvine, College of Medicine, 2013 · 13 years ago
Gender
Female
More record details
Sole proprietor
No
Taxonomy
Federal specialty code 207P00000X (207P00000X)
Mailing address
300 Pasteur Dr, Stanford, CA, 94305
NPI first listed
2013-05-11
NPI last updated
2016-05-16

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