Skip to main content
UniHealth

Doctor search

Cyrena T Simons, MD

Internal Medicine · Stanford

NPI 1538347927

Medicare standing
Clear
Enrolled, allowed to bill and order, not excluded
Plans that list them
13
2 carriers
Office
1
Since medical school
21 years
New York Medical College, 2005

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

13 plans · 2 carriers

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

13 of 13 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
DualConnect (HMO D-SNP)Santa Clara Family Health PlanListedSep 1, 2026

California Medical Board record

Licence A97710 · Current

Licensed to practise in California · since 2006 · expires 2028-04-30 · New York 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 - Hospice and Palliative 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

$17,927

Medicare paid this office $17,927 for 89 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 minutes43$7,108$105
Initial hospital care with moderate level of medical decision making at least 75 minutes27$3,941$146
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes25$3,026$116
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes21$1,836$68
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes11$802$73

Who their Medicare patients are

89 Original Medicare patients in 2024. Average age 74 · Under 65 15% · 85 and older 21% · Women 55% · Also on Medicaid 34% · Health risk score 3.40. 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 45% · Heart failure 45% · Chronic kidney disease 45% · Atrial fibrillation 43% · Depression 38% · Dementia 38% · Diabetes 30% · Cancer 29% · COPD 24% · Stroke 21%.

The office billed $81,743, Medicare allowed $23,119 and paid $17,927; for 198 services of 7 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
202489198743.40$81,743$17,927
202391211713.49$74,381$15,945
202295165733.64$64,355$15,491
2021106197733.36$75,872$19,792
2020108213733.39$84,011$22,458
2019119218753.17$70,319$18,589
201897254763.60$82,445$21,554
2017125320722.75$101,180$27,451
2016167367733.37$124,873$33,076
2015175433733.16$137,090$37,731
2014144326743.04$122,448$34,358
2013135360753.12$124,123$34,224

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
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes29$4,607$110
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes28$3,378$121
Initial hospital care with moderate level of medical decision making at least 75 minutes15$2,399$160
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes19$1,506$75
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes14$1,240$73
Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes15$1,006$40

2022: 6 services

Original Medicare services billed in 2022
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes38$4,473$84
Initial hospital care with moderate level of medical decision making at least 75 minutes15$2,898$181
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes20$2,458$123
Extended inpatient or observation hospital service, first hour18$1,658$79
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes18$1,623$90
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes18$1,169$65

2021: 7 services

Original Medicare services billed in 2021
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes41$5,059$95
Initial hospital care with moderate level of medical decision making at least 75 minutes23$4,256$185
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes30$3,821$127
Extended inpatient or observation hospital service, first hour22$2,220$85
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes21$1,958$93
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes18$1,394$66
Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes12$495$35

2020: 7 services

Original Medicare services billed in 2020
Initial hospital care with moderate level of medical decision making at least 75 minutes31$5,873$189
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes35$5,283$98
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes26$3,474$129
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes25$2,336$93
Extended inpatient or observation hospital service, first hour19$2,290$88
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes19$1,481$67
Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes11$470$34

2019: 6 services

Original Medicare services billed in 2019
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes40$5,471$94
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes35$3,180$91
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes42$3,168$66
Extended inpatient or observation hospital service, first hour19$1,946$85
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes15$1,856$124
Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes24$959$36

2018: 6 services

Original Medicare services billed in 2018
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes44$6,922$94
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes39$3,593$90
Extended inpatient or observation hospital service, first hour24$2,844$84
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes20$2,444$122
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes25$2,223$65
Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes21$1,014$35

2017: 7 services

Original Medicare services billed in 2017
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes65$9,185$91
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes31$3,783$122
Extended inpatient or observation hospital service, first hour33$3,658$83
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes31$2,781$90
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes30$2,556$64
Extended inpatient or observation hospital service, each additional 30 minutes16$2,411$83
Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes18$978$35

2016: 6 services

Original Medicare services billed in 2016
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes66$10,163$91
Initial hospital care with moderate level of medical decision making at least 75 minutes48$8,833$177
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes64$5,356$62
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes34$3,060$87
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes21$2,500$119
Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes34$1,538$34

2015: 6 services

Original Medicare services billed in 2015
Initial hospital care with moderate level of medical decision making at least 75 minutes60$10,912$179
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes66$10,506$93
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes73$7,567$65
Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes52$2,921$35
Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes32$2,849$89
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes19$2,317$122

2014: 4 services

Original Medicare services billed in 2014
Initial hospital care with moderate level of medical decision making at least 75 minutes104$19,426$180
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes51$7,024$92
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes61$4,868$64
Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes42$1,943$35

2013: 4 services

Original Medicare services billed in 2013
Initial hospital care with moderate level of medical decision making at least 75 minutes96$17,373$175
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes53$7,842$90
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes54$5,686$62
Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes52$2,566$34

Medicaid work

$1,984 in 2024

Medicaid paid $1,984 for 32 billed services this clinician did in 2024, up to 12 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 MINUTES32$1,984
Medicaid work by year
202432112$1,984
202323113$1,410
See the largest Medicaid services in earlier years

2023

Largest Medicaid services in 2023
SBSQ HOSPITAL IP/OBS CARE HIGH MDM 50 MINUTES23$1,410

Professional record

NPI
1538347927
Licence
CA A97710California A97710: Current · expires 2028-04-30
Trained
New York Medical College, 2005 · 21 years ago
Gender
Female
More record details
Sole proprietor
Yes
Taxonomy
Federal specialty code 207RH0002X (207RH0002X); Internal medicine (207R00000X)
Mailing address
300 Pasteur Dr, Stanford, CA, 94305
NPI first listed
2008-02-07
NPI last updated
2024-04-16
NPI record certified
2024-04-16

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

Extra NPI addresses: 1804 Embarcadero Rd, Palo Alto, CA, 94303