Marie C Preval, NP

Offices

1 location · Stanford Health Care · 3,152 clinicians in this group

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Hospitals listed: Stanford Health Care. 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 Marie C Preval’s office at (650) 723-4000 to ask if they take your plan before you enroll.

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.

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Every scored measure at Stanford Health Care

Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths	5.31 (4.24 to 6.37) · 8,661 cases	Worse	Jul 2022 – Jun 2024
Rate of inpatient admissions for patients receiving outpatient chemotherapyUnplanned return visits	14.1 (12.7 to 15.7) · 2,191 cases	Worse	Jan 2024 – Dec 2024
Postoperative respiratory failure rateComplications and deaths	4.08 (1.95 to 6.21) · 5,296 cases	Better	Jul 2022 – Jun 2024
Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections	0.317	Better	Oct 2024 – Sep 2025
Clostridium Difficile (C.Diff)Infections	0.446	Better	Oct 2024 – Sep 2025
SSI - Colon SurgeryInfections	0.241	Better	Oct 2024 – Sep 2025
Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits	0.7 (0.6 to 0.9) · 3,348 cases	Better	Jan 2024 – Dec 2024
Abdominopelvic accidental puncture or laceration rateComplications and deaths	1.06 (0.45 to 1.67) · 5,374 cases	No different	Jul 2022 – Jun 2024
CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths	0.86 (0.72 to 1)	No different	Jul 2022 – Jun 2024
Death rate among surgical inpatients with serious treatable complicationsComplications and deaths	166.09 (137.88 to 194.3) · 470 cases	No different	Jul 2022 – Jun 2024
Death rate for CABG surgery patientsComplications and deaths	1.1 · 192 cases	None	Jul 2022 – Jun 2025
Death rate for COPD patientsComplications and deaths	6.4 · 146 cases	None	Jul 2022 – Jun 2025
Death rate for heart attack patientsComplications and deaths	9.7 · 253 cases	None	Jul 2022 – Jun 2025
Death rate for heart failure patientsComplications and deaths	6.3 · 880 cases	None	Jul 2022 – Jun 2025
Death rate for pneumonia patientsComplications and deaths	10.3 · 935 cases	None	Jul 2022 – Jun 2025
Death rate for stroke patientsComplications and deaths	8.7 · 501 cases	None	Jul 2023 – Jun 2025
Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths	2.1 · 7,730 cases	None	Jul 2024 – Jun 2025
Iatrogenic pneumothorax rateComplications and deaths	0.13 (0 to 0.27) · 20,799 cases	No different	Jul 2022 – Jun 2024
In-hospital fall-associated fracture rateComplications and deaths	0.28 (0.14 to 0.43) · 23,182 cases	No different	Jul 2022 – Jun 2024
Postoperative acute kidney injury requiring dialysis rateComplications and deaths	0.94 (0.2 to 1.68) · 5,694 cases	No different	Jul 2022 – Jun 2024
Postoperative hemorrhage or hematoma rateComplications and deaths	2.36 (1.54 to 3.19) · 7,846 cases	No different	Jul 2022 – Jun 2024
Postoperative sepsis rateComplications and deaths	5.2 (3.76 to 6.64) · 5,603 cases	No different	Jul 2022 – Jun 2024
Postoperative wound dehiscence rateComplications and deaths	1.38 (0.23 to 2.53) · 2,211 cases	No different	Jul 2022 – Jun 2024
Pressure ulcer rateComplications and deaths	0.52 (0.21 to 0.83) · 19,915 cases	No different	Jul 2022 – Jun 2024
Rate of complications for hip/knee replacement patientsComplications and deaths	3.6 · 416 cases	None	Apr 2023 – Mar 2025
Central Line Associated Bloodstream Infection (ICU + select Wards)Infections	0.869	No different	Oct 2024 – Sep 2025
MRSA BacteremiaInfections	0.857	No different	Oct 2024 – Sep 2025
SSI - Abdominal HysterectomyInfections	0.368	No different	Oct 2024 – Sep 2025
Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits	16.2 · 247 cases	None	Jul 2023 – Jun 2025
Heart failure (HF) 30-Day Readmission RateUnplanned return visits	20.5 · 1,021 cases	None	Jul 2023 – Jun 2025
Hospital return days for heart attack patientsUnplanned return visits	47.8 · 258 cases	None	Jul 2022 – Jun 2025
Hospital return days for heart failure patientsUnplanned return visits	-1.6 · 990 cases	None	Jul 2022 – Jun 2025
Hospital return days for pneumonia patientsUnplanned return visits	20.8 · 976 cases	None	Jul 2022 – Jun 2025
Pneumonia (PN) 30-Day Readmission RateUnplanned return visits	16.5 · 959 cases	None	Jul 2023 – Jun 2025
Rate of emergency department (ED) visits for patients receiving outpatient chemotherapyUnplanned return visits	5.2 (4.4 to 6.2) · 2,191 cases	No different	Jan 2024 – Dec 2024
Rate of readmission after hip/knee replacementUnplanned return visits	5.1 · 425 cases	None	Jul 2023 – Jun 2025
Rate of readmission for CABGUnplanned return visits	9.6 · 158 cases	None	Jul 2023 – Jun 2025
Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits	19.6 · 183 cases	None	Jul 2023 – Jun 2025
Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits	12.7 (10.4 to 15.4) · 4,578 cases	No different	Jan 2022 – Dec 2024

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

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Patient survey stars by topic at Stanford Health Care

Cleanliness	4
Nurse communication	4
Doctor communication	4
Communication about medicines	3
Discharge information	4
Overall hospital rating	4
Quietness	2
Recommend hospital	5

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Share of patients giving the best answer at Stanford Health Care

Room was "always" clean	75%
Nurses "always" communicated well	82%
Doctors "always" communicated well	81%
Staff "always" explained	63%
Yes, staff "did" give patients this information	89%
Yes, staff "did" give patients information about help after discharge	89%
Doctors "always" explained things so they could understand	76%
Doctors "always" listened carefully	80%
Doctors "always" treated them with courtesy and respect	87%
Patients who gave a rating of "9" or "10" (high)	79%
Staff "always" explained new medications	76%
Nurses "always" explained things so they could understand	77%
Nurses "always" listened carefully	79%
Nurses "always" treated them with courtesy and respect	88%
"Always" quiet at night	53%
"YES", patients would definitely recommend the hospital	83%
Staff "always" explained possible side effects	50%
Yes, staff "did" give patients information about possible symptoms	90%

Original Medicare doctor bills

$66,552

Medicare paid this office $66,552 for 323 people. Most of that is long return visits and Botox.

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

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Largest Original Medicare bills

Long return visit (40+ min)	219	$42,064	$138
Return visit (30+ min)	67	$8,332	$105
New patient visit (60+ min)	27	$4,778	$177
Telephone medical discussion with physician, 21-30 minutes	37	$4,304	$98
Long return visit (40+ min)	17	$1,881	$111

See all 9 services

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Every Original Medicare service billed

Long return visit (40+ min)	219	$42,064	$138
Return visit (30+ min)	67	$8,332	$105
New patient visit (60+ min)	27	$4,778	$177
Telephone medical discussion with physician, 21-30 minutes	37	$4,304	$98
Long return visit (40+ min)	17	$1,881	$111
Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's	101	$1,363	$13
Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or	26	$978	$25
Short return visit (20+ min)	12	$902	$75
Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or	11	$262	$24

Who their Medicare patients are

323 Original Medicare patients in 2024. Average age 77 · Under 65 5% · 85 and older 19% · Women 46% · Also on Medicaid 20% · Health risk score 1.77. Above the middle of the specialty; the typical nurse practitioner clinician is at 1.42.

Conditions among them: High blood pressure 75% · Atrial fibrillation 75% · Coronary heart disease 45% · Heart failure 42% · Diabetes 31% · Chronic kidney disease 31% · Cancer 19% · Depression 17% · COPD 16% · Stroke 15% · Dementia 10%.

The office billed $438,059, Medicare allowed $87,111 and paid $66,552; for 661 services of 10 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

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Original Medicare by year

2024	323	661	77	1.77	$438,059	$66,552
2023	168	225	77	1.71	$171,736	$21,584
2022	246	306	77	1.68	$198,382	$28,820
2021	263	329	76	1.60	$138,305	$20,898
2020	282	331	76	1.93	$109,057	$17,165
2019	144	157	75	1.66	$18,294	$8,826
2018	272	302	75	1.87	$28,314	$15,558
2017	164	186	74	1.93	$17,386	$7,103
2016	47	50	72	1.42	$5,150	$1,982

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: 3 services

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Original Medicare services billed in 2023

Long return visit (40+ min)	141	$17,887	$112
Telephone medical discussion with physician, 21-30 minutes	20	$1,379	$69
Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or	25	$764	$25

2022: 4 services

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Original Medicare services billed in 2022

Long return visit (40+ min)	143	$17,241	$109
Telephone medical discussion with physician, 21-30 minutes	69	$5,559	$71
Return visit (30+ min)	36	$2,506	$66
New patient visit (60+ min)	14	$2,216	$158

2021: 3 services

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Original Medicare services billed in 2021

Short return visit (20+ min)	160	$9,482	$51
Telephone medical discussion with physician, 21-30 minutes	83	$6,653	$69
Long return visit (40+ min)	27	$3,232	$115

2020: 4 services

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Original Medicare services billed in 2020

Short return visit (20+ min)	159	$6,211	$35
Telephone medical discussion with physician, 21-30 minutes	90	$5,977	$60
New patient visit (60+ min)	17	$2,315	$136
Long return visit (40+ min)	14	$1,245	$89

2019: 3 services

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Original Medicare services billed in 2019

Return visit (30+ min)	98	$5,496	$53
Long return visit (40+ min)	24	$1,899	$79
Short return visit (20+ min)	22	$868	$39

2018: 4 services

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Original Medicare services billed in 2018

Short return visit (20+ min)	150	$5,134	$32
Return visit (30+ min)	83	$5,012	$60
Long return visit (40+ min)	34	$3,053	$85
New patient visit (60+ min)	16	$2,010	$126

2017: 1 service

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Original Medicare services billed in 2017

Short return visit (20+ min)	148	$6,026	$35

2016: 1 service

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Original Medicare services billed in 2016

Short return visit (20+ min)	39	$1,549	$38

Drugs they prescribed that Part D paid

$173,922

Pharmacies billed $173,922 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 389) in 2024. At or below the middle of the specialty; the typical nurse practitioner clinician is at 0%.

262 generic and 127 brand-name prescriptions · $173,922 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.

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Largest Part D drug costs

Eliquis	61	$81,748	$1,340
Multaq	32	$42,460	$1,327
Xarelto	30	$38,003	$1,267
Dofetilide	16	$3,572	$223
Metoprolol	67	$952	$14

See all 9 drugs

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Every Part D drug this clinician prescribed

Eliquis	61	$81,748	$1,340
Multaq	32	$42,460	$1,327
Xarelto	30	$38,003	$1,267
Dofetilide	16	$3,572	$223
Metoprolol	67	$952	$14
Flecainide Acetate	31	$876	$28
Diltiazem 24hr Er (Cd)	31	$582	$19
Amiodarone	24	$467	$19
Metoprolol	25	$263	$11

Year by year

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Part D prescribing by year

2024	389	109	0% (0)	33%	$173,922
2023	389	98	None	36%	$175,476
2022	447	118	0% (0)	41%	$212,669
2021	466	104	0% (0)	41%	$199,187
2020	289	96	0% (0)	39%	$106,821
2019	278	97	0% (0)	40%	$103,055
2018	380	101	0% (0)	37%	$79,610
2017	154	53	0% (0)	30%	$24,006
2016	402	55	4% (14)	None	$15,889
2015	154	44	14% (21)	None	$3,729

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

See the drugs prescribed each year

2023: 10 drugs

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Part D drugs prescribed in 2023

Eliquis	92	$103,306	$1,123
Multaq	27	$30,884	$1,144
Xarelto	15	$24,742	$1,649
Flecainide Acetate	45	$2,628	$58
Dofetilide	12	$2,489	$207
Amiodarone	43	$2,095	$49
Metoprolol	53	$1,364	$26
Diltiazem 24hr Er (Cd)	23	$971	$42
Mexiletine	13	$955	$73
Metoprolol	16	$276	$17

2022: 11 drugs

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Part D drugs prescribed in 2022

Eliquis	91	$107,633	$1,183
Multaq	45	$54,031	$1,201
Xarelto	24	$22,869	$953
Pradaxa	13	$16,595	$1,277
Flecainide Acetate	53	$3,676	$69
Metoprolol	82	$2,107	$26
Diltiazem 24hr Er (Cd)	16	$1,660	$104
Enoxaparin	18	$1,005	$56
Amiodarone	19	$275	$14
Metoprolol	14	$221	$16
Carvedilol	11	$193	$18

2021: 11 drugs

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Part D drugs prescribed in 2021

Eliquis	111	$106,904	$963
Multaq	34	$39,964	$1,175
Xarelto	33	$32,078	$972
Flecainide Acetate	31	$2,640	$85
Metoprolol	79	$2,355	$30
Diltiazem 24hr Er (Cd)	24	$1,277	$53
Enoxaparin	20	$1,173	$59
Amiodarone	12	$811	$68
Losartan	13	$172	$13
Metoprolol	22	$162	$7
Carvedilol	11	$116	$11

2020: 9 drugs

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Part D drugs prescribed in 2020

Eliquis	61	$53,353	$875
Multaq	16	$18,779	$1,174
Xarelto	16	$16,737	$1,046
Flecainide Acetate	29	$2,738	$94
Metoprolol	55	$1,238	$23
Enoxaparin	13	$988	$76
Diltiazem 24hr Er (Cd)	20	$696	$35
Amiodarone	11	$328	$30
Lisinopril	11	$41	$4

2019: 7 drugs

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Part D drugs prescribed in 2019

Eliquis	58	$52,924	$912
Xarelto	34	$28,202	$829
Flecainide Acetate	26	$3,099	$119
Metoprolol	30	$1,259	$42
Diltiazem 24hr Er (Cd)	19	$507	$27
Amiodarone	28	$483	$17
Cartia Xt	11	$393	$36

2018: 8 drugs

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Part D drugs prescribed in 2018

Eliquis	79	$47,162	$597
Xarelto	26	$15,109	$581
Flecainide Acetate	28	$2,999	$107
Metoprolol	48	$1,634	$34
Olmesartan-Amlodipine-Hctz	11	$1,025	$93
Cartia Xt	22	$706	$32
Amiodarone	37	$380	$10
Metoprolol	32	$173	$5

2017: 5 drugs

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Part D drugs prescribed in 2017

Eliquis	15	$5,915	$394
Metoprolol	25	$714	$29
Diltiazem 24hr Er	16	$352	$22
Amiodarone	19	$263	$14
Cartia Xt	15	$247	$16

2016: 14 drugs

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Part D drugs prescribed in 2016

Levothyroxine	18	$287	$16
Olanzapine	13	$207	$16
Sertraline	13	$172	$13
Simvastatin	13	$121	$9
Trazodone	21	$117	$6
Atorvastatin	17	$107	$6
Lisinopril	22	$91	$4
Lovastatin	14	$87	$6
Metformin	15	$58	$4
Metoprolol	12	$57	$5
Hydrochlorothiazide	21	$47	$2
Amlodipine Besylate	11	$44	$4
Glipizide	12	$23	$2
Cyclobenzaprine	12	$23	$2

2015: 1 drug

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Part D drugs prescribed in 2015

Hydrocodone-Acetaminophen	12	$195	$16

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: 1053719492
Licence: CA 95001849, FL 9275392
Group: Stanford Health Care
Video visits: Lists video visits
Gender: Female

More record details

Sole proprietor: No
Taxonomy: Nurse practitioner (363L00000X); Federal specialty code 363LA2200X (363LA2200X)
Mailing address: 300 Pasteur Dr, Stanford, CA, 94305
NPI first listed: 2014-12-17
NPI last updated: 2025-12-30
NPI record certified: 2025-12-30

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

Extra NPI addresses: 4400 the Woods Dr Apt 2033, San Jose, CA, 95136