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Reena Parada Thomas, MD

Neurology · Stanford

NPI 1285868786

Medicare standing
Clear
Enrolled, allowed to bill and order, not excluded
Plans that list them
5
2 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

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. Thomas’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 A117262 · Current

Licensed to practise in California · since 2011 · expires 2028-10-31 · Georgetown University 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

$4,342

Medicare paid this office $4,342 for 28 people.

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

Largest Original Medicare bills
Return visit (30+ min)15$1,305$87

Who their Medicare patients are

28 Original Medicare patients in 2024. Average age 69 · Women 57% · Health risk score 2.78. Sicker patients than 9 in 10 peers; the typical neurology clinician is at 1.61.

Conditions among them: High blood pressure 64% · Cancer 46% · Stroke 39%.

The office billed $12,113, Medicare allowed $5,666 and paid $4,342; for 40 services of 4 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
20242840692.78$12,113$4,342
202364143692.29$58,451$14,035
202262121702.67$49,264$13,604
202155128711.86$60,973$13,229
202059193692.27$78,656$15,864
201981185712.41$25,917$17,786
201881185692.15$31,136$18,841
201788176692.23$45,109$18,251
201689177692.16$54,053$18,422
201573135712.25$50,151$16,338
20141521691.24$9,198$2,774

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: 2 services

Original Medicare services billed in 2023
Return visit (30+ min)51$10,519$90
New patient visit (60+ min)16$2,537$159

2022: 3 services

Original Medicare services billed in 2022
Return visit (30+ min)45$6,202$91
Long return visit (40+ min)27$4,293$130
New patient visit (60+ min)16$2,713$170

2021: 2 services

Original Medicare services billed in 2021
Return visit (30+ min)37$7,641$89
Long return visit (40+ min)21$3,547$131

2020: 5 services

Original Medicare services billed in 2020
Return visit (30+ min)31$6,022$74
Return visit (30+ min)23$3,200$80
Long return visit (40+ min)15$2,015$96
New patient visit (45+ min)11$1,351$123
Long return visit (40+ min)11$1,080$98

2019: 4 services

Original Medicare services billed in 2019
Long return visit (40+ min)34$6,658$99
Long return visit (40+ min)24$4,956$99
New patient visit (60+ min)14$2,047$146
Return visit (30+ min)17$1,435$68

2018: 4 services

Original Medicare services billed in 2018
Long return visit (40+ min)28$6,085$100
Long return visit (40+ min)27$4,946$97
New patient visit (60+ min)20$3,010$151
Return visit (30+ min)12$848$71

2017: 3 services

Original Medicare services billed in 2017
Long return visit (40+ min)36$6,513$96
Long return visit (40+ min)24$5,006$98
New patient visit (60+ min)20$2,885$144

2016: 5 services

Original Medicare services billed in 2016
Long return visit (40+ min)36$6,411$99
Long return visit (40+ min)18$4,261$99
New patient visit (60+ min)14$2,096$150
New patient visit (60+ min)11$1,647$150
Return visit (30+ min)14$1,140$67

2015: 3 services

Original Medicare services billed in 2015
New patient visit (60+ min)38$5,645$149
Long return visit (40+ min)32$5,512$97
Initial hospital care with moderate level of medical decision making at least 75 minutes17$3,223$179

Medicaid work

$814 in 2021

Medicaid paid $814 for 13 billed services this clinician did in 2021, 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 2021
Return visit (30+ min)13$814
Medicaid work by year
202113112$814

Money from drug and device companies

$39 in 2019

A payment is not proof that care is biased.

Payments by company
NovocureOncology$39
1 payment
  • Meals for Oncology · 2019-11-23 · $39
See the published payment
Every published payment
NovocureMeals · 2019-11-23Oncology$39

Research money

Money a company paid to run a study. Where it went to their institution, the clinician is named as an investigator and did not receive it; the amount covers the whole study, often across many sites.

Research payments by company and study
E.R. Squibb & Sons, L.L.C. · A Multi-Center Phase II Blinded Or Open-Label Study To Evaluate Tumor Response in Subjects With Melanoma Brain Metastases Treated With Nivolumab Monotherapy Or Nivolumab Combined With Ipilimumab · 2019Their institution$44,636
E.R. Squibb & Sons, L.L.C. · A Multi-Center Phase II [Blinded Or Open-Label] Study To Evaluate Tumor Response in Subjects With Melanoma Brain Metastases Treated With Nivolumab Monotherapy Or Nivolumab Combined With Ipilimumab · 2021Their institution$17,179
E.R. Squibb & Sons, L.L.C. · A Multi-Center Phase II [Blinded Or Open-Label] Study To Evaluate Tumor Response in Subjects With Melanoma Brain Metastases Treated With Nivolumab Monotherapy Or Nivolumab Combined With Ipilimumab · 2020Their institution$16,884

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
1285868786
Licence
CA A117262California A117262: Current · expires 2028-10-31
Gender
Female
More record details
Sole proprietor
No
Taxonomy
Neurology (2084N0400X); Student in a training program (390200000X)
Mailing address
300 Pasteur Drive, Neurology, Room H3144/Mc:5235, Stanford, CA, 94305
NPI first listed
2009-05-12
NPI last updated
2014-05-27

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