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David Michael Quillen, MD

Family Practice · Stanford

NPI 1912939398

Medicare standing
Clear
Enrolled, allowed to bill and order, not excluded
Plans that list them
10
2 carriers
Offices
3

Offices

3 locations · Stanford Health Care · University Healthcare Alliance

Looking this up.

Hospitals listed: Stanford Health Care Tri-Valley. That is not proof they admit you there this week.

Plans that list them

10 plans · 2 carriers

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

10 of 10 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
DualConnect (HMO D-SNP)Santa Clara Family Health PlanListedSep 1, 2026

California Medical Board record

Licence G193646 · Current

Licensed to practise in California · since 2024 · expires 2028-04-30 · University of North Carolina at Chapel Hill.

No disciplinary actions, convictions, malpractice judgments or citations in this record.

State licence records

1 licence

  • Florida ME77291Medical Doctor · since 1999 · expires 2027-01-31
    ActiveNo board action on this licenceCheck it with the state

We check Colorado, Delaware, Florida, Illinois, Maryland, New Jersey, New York, Tennessee, Texas, Virginia, Washington, plus California above. A state that is not in this list has not been checked, which is not the same as clear.

School, training and certification

3 placements

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

  • Family Medicine

Education

  • University of North Carolina C · MD1992Medical school

Residency and fellowship

  • Duke University, OtherDURHAM, NC · 1995–1996
  • Duke University, Family Medicine***, NC · 1993–1995
  • Duke University, Family Medicine***, NC · 1992–1993

What else the board holds

Hospitals they may admit to

Where the clinician told their state board they may admit and treat patients.

  • Shands Hospital at the University of Flo · FL

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 Care Tri-ValleyPleasanton, CAAcute Care Hospital · Voluntary non-profit - Private · Has an emergency department · Birthing-friendlyPart of Stanford Health Care, which runs 3 hospitalsPatients rate it 3 of 5 · 74% would definitely recommend it
    Overall rating: 5 of 5 starsBetter than the national rate — Central Line Associated Bloodstream Infection (ICU + select Wards): 0.178, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.237, Oct 2024 – Sep 2025
See every measure and the patient survey for Stanford Health Care Tri-Valley

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: 2 better, 7 the same, 0 worse of 9 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 Tri-Valley
Central Line Associated Bloodstream Infection (ICU + select Wards)Infections0.178BetterOct 2024 – Sep 2025
Clostridium Difficile (C.Diff)Infections0.237BetterOct 2024 – Sep 2025
Abdominopelvic accidental puncture or laceration rateComplications and deaths0.79 (0 to 1.73) · 1,041 casesNo differentJul 2022 – Jun 2024
CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths0.79 (0.5 to 1.08)No differentJul 2022 – Jun 2024
Death rate among surgical inpatients with serious treatable complicationsComplications and deaths145.81 (96.5 to 195.12) · 72 casesNo differentJul 2022 – Jun 2024
Death rate for CABG surgery patientsComplications and deaths2.9 · 55 casesNoneJul 2022 – Jun 2025
Death rate for COPD patientsComplications and deaths8.6 · 92 casesNoneJul 2022 – Jun 2025
Death rate for heart attack patientsComplications and deaths12.5 · 96 casesNoneJul 2022 – Jun 2025
Death rate for heart failure patientsComplications and deaths9.5 · 395 casesNoneJul 2022 – Jun 2025
Death rate for pneumonia patientsComplications and deaths10.3 · 391 casesNoneJul 2022 – Jun 2025
Death rate for stroke patientsComplications and deaths10.1 · 162 casesNoneJul 2023 – Jun 2025
Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths3 · 1,736 casesNoneJul 2024 – Jun 2025
Iatrogenic pneumothorax rateComplications and deaths0.16 (0 to 0.37) · 4,425 casesNo differentJul 2022 – Jun 2024
In-hospital fall-associated fracture rateComplications and deaths0.22 (0.02 to 0.41) · 4,771 casesNo differentJul 2022 – Jun 2024
Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths3.45 (1.46 to 5.44) · 1,403 casesNo differentJul 2022 – Jun 2024
Postoperative acute kidney injury requiring dialysis rateComplications and deaths1.5 (0.05 to 2.94) · 645 casesNo differentJul 2022 – Jun 2024
Postoperative hemorrhage or hematoma rateComplications and deaths1.81 (0.38 to 3.24) · 1,279 casesNo differentJul 2022 – Jun 2024
Postoperative respiratory failure rateComplications and deaths8.53 (3.2 to 13.85) · 639 casesNo differentJul 2022 – Jun 2024
Postoperative sepsis rateComplications and deaths5.15 (1.89 to 8.41) · 648 casesNo differentJul 2022 – Jun 2024
Postoperative wound dehiscence rateComplications and deaths1.61 (0.14 to 3.07) · 370 casesNo differentJul 2022 – Jun 2024
Pressure ulcer rateComplications and deaths0.16 (0 to 0.83) · 4,160 casesNo differentJul 2022 – Jun 2024
Rate of complications for hip/knee replacement patientsComplications and deaths4 · 74 casesNoneApr 2023 – Mar 2025
Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections0.369No differentOct 2024 – Sep 2025
MRSA BacteremiaInfections1.112No differentOct 2024 – Sep 2025
SSI - Colon SurgeryInfections0No differentOct 2024 – Sep 2025
Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits13.1 · 110 casesNoneJul 2023 – Jun 2025
Heart failure (HF) 30-Day Readmission RateUnplanned return visits20.1 · 437 casesNoneJul 2023 – Jun 2025
Hospital return days for heart attack patientsUnplanned return visits-5.8 · 94 casesNoneJul 2022 – Jun 2025
Hospital return days for heart failure patientsUnplanned return visits-19.3 · 456 casesNoneJul 2022 – Jun 2025
Hospital return days for pneumonia patientsUnplanned return visits-0.3 · 402 casesNoneJul 2022 – Jun 2025
Pneumonia (PN) 30-Day Readmission RateUnplanned return visits15.8 · 358 casesNoneJul 2023 – Jun 2025
Rate of emergency department (ED) visits for patients receiving outpatient chemotherapyUnplanned return visits6.8 (4.7 to 9.6) · 198 casesNo differentJan 2024 – Dec 2024
Rate of inpatient admissions for patients receiving outpatient chemotherapyUnplanned return visits10.1 (7.5 to 13.6) · 198 casesNo differentJan 2024 – Dec 2024
Rate of readmission after hip/knee replacementUnplanned return visits5.3 · 80 casesNoneJul 2023 – Jun 2025
Rate of readmission for CABGUnplanned return visits10.9 · 46 casesNoneJul 2023 – Jun 2025
Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits19.3 · 92 casesNoneJul 2023 – Jun 2025
Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits12.4 (9.6 to 16.2) · 1,532 casesNo differentJan 2022 – Dec 2024
Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits1 (0.8 to 1.2) · 929 casesNo differentJan 2024 – Dec 2024

What patients said (1,268 patients answered, 26% of those asked)

Patient survey stars by topic at Stanford Health Care Tri-Valley
Cleanliness3
Nurse communication3
Doctor communication4
Communication about medicines3
Discharge information4
Overall hospital rating3
Quietness2
Recommend hospital4
Share of patients giving the best answer at Stanford Health Care Tri-Valley
Room was "always" clean65%
Nurses "always" communicated well77%
Doctors "always" communicated well79%
Staff "always" explained58%
Yes, staff "did" give patients this information88%
Yes, staff "did" give patients information about help after discharge88%
Doctors "always" explained things so they could understand74%
Doctors "always" listened carefully78%
Doctors "always" treated them with courtesy and respect86%
Patients who gave a rating of "9" or "10" (high)70%
Staff "always" explained new medications72%
Nurses "always" explained things so they could understand73%
Nurses "always" listened carefully74%
Nurses "always" treated them with courtesy and respect84%
"Always" quiet at night42%
"YES", patients would definitely recommend the hospital74%
Staff "always" explained possible side effects44%
Yes, staff "did" give patients information about possible symptoms89%

Original Medicare doctor bills

$11,199

Medicare paid this office $11,199 for 42 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 minutes31$7,760$103
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes18$1,458$63
Hospital discharge day management, more than 30 minutes12$1,242$104

Who their Medicare patients are

42 Original Medicare patients in 2024. Average age 75 · Women 45% · Also on Medicaid 31% · Health risk score 2.80. Sicker patients than 9 in 10 peers; the typical family practice clinician is at 1.13.

Conditions among them: High blood pressure 75% · Chronic kidney disease 62% · Coronary heart disease 60% · Diabetes 50% · Heart failure 48% · Atrial fibrillation 36% · Depression 36% · Dementia 33% · COPD 31%.

The office billed $43,993, Medicare allowed $14,530 and paid $11,199; for 123 services of 8 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
202442123752.80$43,993$11,199
202376216792.38$34,693$13,885
202255134762.17$21,870$7,983
202192222752.14$35,524$13,417
202098225742.61$36,008$13,676
2019189415712.94$94,352$23,140
2018283826692.28$268,624$59,445
2017290752672.57$248,613$54,547
20163611,012692.64$360,201$80,498
2015401995662.40$308,802$66,867
20145451,350661.95$367,915$82,284
20135681,419662.10$395,011$89,133

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: 5 services

Original Medicare services billed in 2023
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes55$7,697$62
Hospital discharge day management, 30 minutes or less34$2,196$65
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes15$1,578$88
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes12$1,224$102
Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes11$887$39

2022: 2 services

Original Medicare services billed in 2022
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes38$4,226$54
Hospital discharge day management, 30 minutes or less30$1,725$58

2021: 3 services

Original Medicare services billed in 2021
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes54$6,252$57
Hospital discharge day management, 30 minutes or less46$2,637$57
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes20$2,354$81

2020: 4 services

Original Medicare services billed in 2020
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes46$5,455$57
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes32$4,083$85
Hospital discharge day management, 30 minutes or less42$2,435$58
Hospital observation care on day of discharge14$801$57

2019: 9 services

Original Medicare services billed in 2019
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes39$5,367$84
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes48$5,282$57
Hospital discharge day management, 30 minutes or less70$3,813$54
Initial hospital care with moderate level of medical decision making at least 75 minutes19$2,758$145
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes20$1,772$89
Short return visit (20+ min)30$1,149$37
Hospital observation care on day of discharge11$528$48
Hemoglobin a1c level25$285$11
Blood test, clotting time12$111$4

2018: 9 services

Original Medicare services billed in 2018
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes89$18,519$82
Initial hospital care with moderate level of medical decision making at least 75 minutes81$14,559$158
Hospital discharge day management, 30 minutes or less108$7,184$57
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes54$6,115$58
Short return visit (20+ min)74$4,005$50
Return visit (30+ min)38$3,007$65
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes19$1,979$104
Blood test, clotting time16$95$5
Insertion of needle into vein for collection of blood sample23$74$3

2017: 10 services

Original Medicare services billed in 2017
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes56$13,083$82
Initial hospital care with moderate level of medical decision making at least 75 minutes69$11,830$158
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes53$6,402$57
Hospital discharge day management, 30 minutes or less99$6,242$56
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes39$4,322$108
Short return visit (20+ min)72$3,936$48
Initial hospital observation care per day, typically 50 minutes22$2,340$106
Return visit (30+ min)28$1,703$55
Hospital observation care on day of discharge15$799$53
Insertion of needle into vein for collection of blood sample20$62$3

2016: 9 services

Original Medicare services billed in 2016
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes96$18,087$83
Initial hospital care with moderate level of medical decision making at least 75 minutes100$17,248$157
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes105$12,515$56
Hospital discharge day management, 30 minutes or less171$10,885$56
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes90$9,425$100
Initial hospital observation care per day, typically 50 minutes58$6,093$102
Initial hospital observation care per day, typically 70 minutes13$1,676$129
Hospital observation care on day of discharge20$1,196$57
Short return visit (20+ min)22$991$45

2015: 11 services

Original Medicare services billed in 2015
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes113$13,039$57
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes98$11,092$106
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes53$9,379$83
Hospital discharge day management, 30 minutes or less147$9,357$57
Initial hospital care with moderate level of medical decision making at least 75 minutes46$8,029$161
Initial hospital observation care per day, typically 50 minutes38$4,093$108
Short return visit (20+ min)96$3,921$35
Return visit (30+ min)25$1,735$69
Hospital observation care on day of discharge20$1,152$58
Blood test, clotting time32$231$5
Insertion of needle into vein for collection of blood sample21$65$3

2014: 14 services

Original Medicare services billed in 2014
Short return visit (20+ min)218$13,806$52
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes118$13,518$56
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes119$12,929$103
Initial hospital care with moderate level of medical decision making at least 75 minutes62$10,410$160
Hospital discharge day management, 30 minutes or less154$9,428$56
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes47$5,923$82
Initial hospital observation care per day, typically 50 minutes51$5,515$104
Return visit (30+ min)33$2,866$84
Hospital observation care on day of discharge20$1,089$54
Administration of influenza virus vaccine32$770$24
Influenza vaccine, quadrivalent, preservative free, 0.5 ml dosage29$519$18
Blood test, clotting time46$384$5
Insertion of needle into vein for collection of blood sample54$168$3
Automated urinalysis test11$36$3

2013: 16 services

Original Medicare services billed in 2013
Initial hospital care with moderate level of medical decision making at least 75 minutes97$17,125$157
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes89$13,975$80
Short return visit (20+ min)217$12,462$47
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes98$10,506$56
Hospital discharge day management, 30 minutes or less144$9,072$56
Initial hospital care with straightforward or low-level medical decision making at least 55 minutes64$7,354$108
Initial hospital observation care per day, typically 50 minutes49$5,161$105
Initial hospital observation care per day, typically 70 minutes22$3,427$143
Return visit (30+ min)35$2,617$69
Hospital observation care on day of discharge38$2,140$54
Follow-up observation care per day, typically 25 minutes11$780$56
Blood test, clotting time49$357$5
Administration of influenza virus vaccine13$327$25
Insertion of needle into vein for collection of blood sample86$281$3
Hemoglobin a1c level19$250$13
Influenza vaccine, trivalent, split virus, preservative-free, 0.5 ml dosage13$160$12

Medicaid work

$2,522 in 2024

Medicaid paid $2,522 for 138 billed services this clinician did in 2024, up to 24 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
Short return visit (20+ min)64$1,789
Return visit (30+ min)16$733
Most recent systolic blood pressure less than 130 mm Hg (DM) (HTN, CKD, CAD)33$0
Most recent diastolic blood pressure less than 80 mm Hg (HTN, CKD, CAD) (DM)25$0
Medicaid work by year
2024138424$2,522
2021292435$4,509
2020347428$7,189
20191,6951772$27,556
201814113$89
See the largest Medicaid services in earlier years

2021

Largest Medicaid services in 2021
Short return visit (20+ min)165$3,792
Return visit (30+ min)16$717
Most recent systolic blood pressure less than 130 mm Hg (DM) (HTN, CKD, CAD)50$0
Most recent diastolic blood pressure less than 80 mm Hg (HTN, CKD, CAD) (DM)61$0

2020

Largest Medicaid services in 2020
Short return visit (20+ min)126$4,277
Return visit (30+ min)68$2,911
Most recent systolic blood pressure less than 130 mm Hg (DM) (HTN, CKD, CAD)56$0
Most recent diastolic blood pressure less than 80 mm Hg (HTN, CKD, CAD) (DM)97$0

2019

Largest Medicaid services in 2019
Short return visit (20+ min)466$12,208
Return visit (30+ min)214$9,052
New patient visit (30+ min)33$2,118
URINE PREGNANCY TEST29$1,829
Periodic comprehensive preventive medicine reevaluation and management of an individual including an age and gender appropriate history, examination, counseling/anticipatory guidance/risk factor reduction interventions, and the ordering of laboratory/diagnostic procedures, established patient; late childhood (age 5 through 11 years)20$1,493
Immunization administration (includes percutaneous, intradermal, subcutaneous, or intramuscular injections); 1 vaccine (single or combination vaccine/toxoid)60$480
Hospital inpatient or observation discharge day management; 30 minutes or less on the date of the encounter17$185
Hemoglobin A1C level28$113
Most recent systolic blood pressure greater than or equal to 140 mm Hg (HTN, CKD, CAD) (DM)72$77
Urinalysis, by dip stick or tablet reagent for bilirubin, glucose, hemoglobin, ketones, leukocytes, nitrite, pH, protein, specific gravity, urobilinogen, any number of these constituents; non-automated, without microscopy13$2
Most recent systolic blood pressure less than 130 mm Hg (DM) (HTN, CKD, CAD)241$0
Most recent systolic blood pressure 130-139 mm Hg (DM) (HTN, CKD, CAD)50$0

2018

Largest Medicaid services in 2018
Hospital inpatient or observation discharge day management; 30 minutes or less on the date of the encounter14$89

Money from drug and device companies

$23 in 2024

Industry payments by year
202411None$23
202311None$28
202224None$72

Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.

A payment is not proof that care is biased.

Payments by company
Boston ScientificWavewriter Alpha Prime 16$23
1 payment
  • Meals for Wavewriter Alpha Prime 16 · 2024-08-30 · $23
See the published payment
Every published payment
Boston ScientificMeals · 2024-08-30Wavewriter Alpha Prime 16$23
See earlier years (2023, 2022)

2023: $28

Payments by company in 2023
Gilead SciencesNone$28
1 payment
  • Meals · 2023-08-09 · $28

2022: $72

Payments by company in 2022
Janssen PharmaceuticalsXarelto$51
3 payments
  • Meals for Xarelto · 2022-08-16 · $21
  • Meals for Xarelto · 2022-07-26 · $15
  • Meals for Xarelto · 2022-07-07 · $14
Gilead SciencesEpclusa$21
1 payment
  • Meals for Epclusa · 2022-04-29 · $21

Professional record

NPI
1912939398
Licence
CA G193646, FL ME77291California G193646: Current · expires 2028-04-30Florida ME77291: Active
Group
Stanford Health Care · University Healthcare Alliance
Gender
Male
More record details
Sole proprietor
No
Medicaid ID
FL 255046600
Taxonomy
Family medicine (207Q00000X)
Mailing address
300 Pasteur Dr, Stanford, CA, 94305
NPI first listed
2006-07-07
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: 6400 W Newberry Rd Ste 202, Gainesville, FL, 32605