John Robert Dayton, MD

Offices

2 locations · Stanford Health Care · North Valley Emergency Physicians Lc

Looking this up.

Hospitals listed: American Fork Hospital. That is not proof they admit you there this week.

Plans that list them

1 plan · 1 carrier

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

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Plans whose provider directory lists this clinician

DualConnect (HMO D-SNP)	Santa Clara Family Health Plan	Listed	Sep 1, 2026

California Medical Board record

Licence C171586 · Current

Licensed to practise in California · since 2021 · expires 2027-02-28 · George Washington 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.

American Fork HospitalAmerican Fork, UTAcute Care Hospital · Voluntary non-profit - Private · Has an emergency department · Birthing-friendlyPart of Intermountain Healthcare, which runs 33 hospitals in 4 statesPatients rate it 4 of 5 · 76% would definitely recommend it
Overall rating: 4 of 5 starsBetter than the national rate — Clostridium Difficile (C.Diff): 0.181, Oct 2024 – Sep 2025

See every measure and the patient survey for American Fork Hospital

Behind the star rating — Deaths: 0 better, 3 the same, 0 worse of 3 measures. Safety: 1 better, 3 the same, 0 worse of 4 measures. Readmissions: 1 better, 6 the same, 0 worse of 7 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 American Fork Hospital

Clostridium Difficile (C.Diff)Infections	0.181	Better	Oct 2024 – Sep 2025
Abdominopelvic accidental puncture or laceration rateComplications and deaths	1.01 (0 to 2.08) · 243 cases	No different	Jul 2022 – Jun 2024
CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths	0.9 (0.44 to 1.37)	No different	Jul 2022 – Jun 2024
Death rate for heart failure patientsComplications and deaths	12 · 70 cases	None	Jul 2022 – Jun 2025
Death rate for pneumonia patientsComplications and deaths	14.7 · 105 cases	None	Jul 2022 – Jun 2025
Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths	4 · 937 cases	None	Jul 2024 – Jun 2025
Iatrogenic pneumothorax rateComplications and deaths	0.2 (0 to 0.43) · 1,299 cases	No different	Jul 2022 – Jun 2024
In-hospital fall-associated fracture rateComplications and deaths	0.31 (0.09 to 0.52) · 1,237 cases	No different	Jul 2022 – Jun 2024
Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths	3.19 (0.67 to 5.72) · 197 cases	No different	Jul 2022 – Jun 2024
Postoperative acute kidney injury requiring dialysis rateComplications and deaths	1.65 (0 to 3.38) · 72 cases	No different	Jul 2022 – Jun 2024
Postoperative hemorrhage or hematoma rateComplications and deaths	2.25 (0.54 to 3.95) · 189 cases	No different	Jul 2022 – Jun 2024
Postoperative respiratory failure rateComplications and deaths	8.59 (0 to 18.34) · 68 cases	No different	Jul 2022 – Jun 2024
Postoperative sepsis rateComplications and deaths	4.96 (0.73 to 9.19) · 62 cases	No different	Jul 2022 – Jun 2024
Postoperative wound dehiscence rateComplications and deaths	1.75 (0.22 to 3.27) · 70 cases	No different	Jul 2022 – Jun 2024
Pressure ulcer rateComplications and deaths	0.45 (0 to 1.58) · 886 cases	No different	Jul 2022 – Jun 2024
MRSA BacteremiaInfections	0	No different	Oct 2024 – Sep 2025
SSI - Colon SurgeryInfections	0	No different	Oct 2024 – Sep 2025
Heart failure (HF) 30-Day Readmission RateUnplanned return visits	21.6 · 151 cases	None	Jul 2023 – Jun 2025
Hospital return days for heart failure patientsUnplanned return visits	-36.8 · 85 cases	None	Jul 2022 – Jun 2025
Hospital return days for pneumonia patientsUnplanned return visits	-26.6 · 118 cases	None	Jul 2022 – Jun 2025
Pneumonia (PN) 30-Day Readmission RateUnplanned return visits	16.5 · 163 cases	None	Jul 2023 – Jun 2025
Rate of emergency department (ED) visits for patients receiving outpatient chemotherapyUnplanned return visits	5.3 (3.2 to 8.5) · 35 cases	No different	Jan 2024 – Dec 2024
Rate of inpatient admissions for patients receiving outpatient chemotherapyUnplanned return visits	9.7 (6.3 to 14.6) · 35 cases	No different	Jan 2024 – Dec 2024
Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits	13.7 (10.3 to 18.5) · 524 cases	No different	Jan 2022 – Dec 2024
Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits	1.1 (0.8 to 1.4) · 374 cases	No different	Jan 2024 – Dec 2024

What patients said (1,115 patients answered, 22% of those asked)

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Patient survey stars by topic at American Fork Hospital

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

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Share of patients giving the best answer at American Fork Hospital

Room was "always" clean	75%
Nurses "always" communicated well	79%
Doctors "always" communicated well	81%
Staff "always" explained	60%
Yes, staff "did" give patients this information	89%
Yes, staff "did" give patients information about help after discharge	88%
Doctors "always" explained things so they could understand	77%
Doctors "always" listened carefully	80%
Doctors "always" treated them with courtesy and respect	85%
Patients who gave a rating of "9" or "10" (high)	74%
Staff "always" explained new medications	75%
Nurses "always" explained things so they could understand	75%
Nurses "always" listened carefully	76%
Nurses "always" treated them with courtesy and respect	87%
"Always" quiet at night	55%
"YES", patients would definitely recommend the hospital	76%
Staff "always" explained possible side effects	45%
Yes, staff "did" give patients information about possible symptoms	89%

Original Medicare doctor bills

$18,174

Medicare paid this office $18,174 for 126 people.

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

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Largest Original Medicare bills

Emergency department visit with high level of medical decision making	86	$11,926	$128
Emergency department visit with moderate level of medical decision making	34	$3,228	$90
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	31	$181	$6

Who their Medicare patients are

126 Original Medicare patients in 2024. Average age 73 · Under 65 12% · 85 and older 18% · Women 56% · Also on Medicaid 22% · Health risk score 2.07. Above the middle of the specialty; the typical emergency medicine clinician is at 2.01.

Conditions among them: High blood pressure 75% · Coronary heart disease 44% · Diabetes 37% · Depression 37% · Chronic kidney disease 34% · Heart failure 28% · Atrial fibrillation 22% · Cancer 18% · COPD 16% · Dementia 13%.

The office billed $151,152, Medicare allowed $24,414 and paid $18,174; for 196 services of 20 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	126	196	73	2.07	$151,152	$18,174
2023	236	258	75	2.31	$189,245	$29,755
2022	349	394	74	1.94	$281,916	$47,148
2021	245	287	73	2.25	$113,816	$23,854
2020	247	356	71	2.36	$239,693	$24,179
2019	376	481	68	2.04	$545,702	$49,986
2018	198	249	69	2.38	$162,704	$22,887
2017	157	239	66	2.31	$85,960	$17,495
2016	175	252	68	1.80	$95,980	$20,010
2015	192	235	67	1.76	$109,490	$22,892
2014	189	250	66	1.78	$109,408	$22,305
2013	172	226	66	1.84	$120,810	$20,976

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: 4 services

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Original Medicare services billed in 2023

Emergency department visit with high level of medical decision making	102	$15,422	$151
Emergency department visit with moderate level of medical decision making	70	$6,274	$90
Critical care, first 30-74 minutes	12	$2,308	$192
Emergency department visit with low level of medical decision making	30	$1,738	$58

2022: 5 services

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Original Medicare services billed in 2022

Emergency department visit with high level of medical decision making	123	$20,544	$166
Emergency department visit with moderate level of medical decision making	167	$19,169	$115
Emergency department visit with low level of medical decision making	12	$850	$65
Emergency department visit with straightforward medical decision making	15	$592	$39
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	16	$126	$7

2021: 5 services

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Original Medicare services billed in 2021

Emergency department visit with moderate level of medical decision making	103	$11,758	$113
Emergency department visit with high level of medical decision making	32	$5,317	$166
Emergency department visit with low level of medical decision making	78	$3,636	$46
Emergency department visit with straightforward medical decision making	16	$450	$26
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	28	$127	$5

2020: 6 services

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Original Medicare services billed in 2020

Emergency department visit with high level of medical decision making	72	$9,278	$127
Critical care, first 30-74 minutes	29	$5,104	$170
Emergency department visit with low level of medical decision making	92	$4,772	$50
Emergency department visit with moderate level of medical decision making	34	$2,973	$87
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	94	$637	$7
Emergency department visit with straightforward medical decision making	16	$567	$35

2019: 5 services

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Original Medicare services billed in 2019

Emergency department visit with high level of medical decision making	229	$31,776	$134
Emergency department visit with moderate level of medical decision making	94	$8,482	$87
Critical care, first 30-74 minutes	36	$6,568	$173
Emergency department visit with low level of medical decision making	24	$1,112	$46
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	63	$447	$7

2018: 3 services

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Original Medicare services billed in 2018

Emergency department visit with high level of medical decision making	95	$13,089	$134
Emergency department visit with moderate level of medical decision making	87	$7,563	$85
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	31	$197	$6

2017: 3 services

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Original Medicare services billed in 2017

Emergency department visit with high level of medical decision making	61	$8,545	$136
Emergency department visit with moderate level of medical decision making	76	$6,457	$83
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	61	$427	$6

2016: 4 services

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Original Medicare services billed in 2016

Emergency department visit with high level of medical decision making	72	$10,072	$134
Emergency department visit with moderate level of medical decision making	69	$5,925	$86
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	30	$196	$6
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	26	$182	$6

2015: 3 services

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Original Medicare services billed in 2015

Emergency department visit with high level of medical decision making	84	$11,842	$133
Emergency department visit with moderate level of medical decision making	82	$7,386	$87
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	19	$120	$6

2014: 3 services

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Original Medicare services billed in 2014

Emergency department visit with high level of medical decision making	105	$14,322	$130
Emergency department visit with moderate level of medical decision making	55	$4,862	$87
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	38	$242	$6

2013: 3 services

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Original Medicare services billed in 2013

Emergency department visit with high level of medical decision making	106	$14,123	$128
Emergency department visit with moderate level of medical decision making	50	$4,502	$87
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	31	$199	$6

Medicaid work

$2,438 in 2024

Medicaid paid $2,438 for 39 billed services this clinician did in 2024, up to 15 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.

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Largest Medicaid services in 2024

EMERGENCY DEPARTMENT VISIT HIGH MDM	27	$2,438
Blood count; complete (CBC), automated (Hgb, Hct, RBC, WBC and platelet count) and automated differential WBC count	12	$0

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Medicaid work by year

2024	39	2	15	$2,438
2023	232	6	25	$12,121
2022	303	2	29	$20,111
2021	117	1	39	$6,806
2020	2,240	29	59	$92,777
2019	6,356	36	69	$243,326
2018	1,787	20	72	$83,135

See the largest Medicaid services in earlier years

2023

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Largest Medicaid services in 2023

EMERGENCY DEPT VISIT MOD MDM	119	$7,793
EMERGENCY DEPARTMENT VISIT HIGH MDM	39	$1,984
EMERGENCY DEPT VISIT LOW MDM	30	$1,614
Infectious disease (viral respiratory tract infection), pathogen-specific RNA, 4 targets (severe acute respiratory syndrome coronavirus 2 [SARS-CoV-2], influenza A, influenza B, respiratory syncytial virus [RSV]), upper respiratory specimen, each pathogen reported as detected or not detected	13	$729
COMPREHENSIVE METABOLIC PANEL	16	$0
Blood count; complete (CBC), automated (Hgb, Hct, RBC, WBC and platelet count) and automated differential WBC count	15	$0

2022

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Largest Medicaid services in 2022

EMERGENCY DEPT VISIT MOD MDM	248	$16,971
EMERGENCY DEPARTMENT VISIT HIGH MDM	55	$3,140

2021

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Largest Medicaid services in 2021

EMERGENCY DEPT VISIT MOD MDM	117	$6,806

2020

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Largest Medicaid services in 2020

EMERGENCY DEPT VISIT MOD MDM	285	$31,756
EMERGENCY DEPT VISIT LOW MDM	212	$22,763
Intravenous infusion, hydration; each additional hour (List separately in addition to code for primary procedure)	49	$18,086
EMERGENCY DEPARTMENT VISIT HIGH MDM	160	$16,620
EMERGENCY DEPARTMENT VISIT STRAIGHTFORWARD MDM	12	$1,261
Radiologic examination, chest; 2 views	64	$714
Blood count; complete (CBC), automated (Hgb, Hct, RBC, WBC and platelet count) and automated differential WBC count	245	$463
Electrocardiogram, routine ECG with at least 12 leads; interpretation and report only	65	$366
Infectious agent antigen detection by immunoassay with direct optical (ie, visual) observation; Influenza	154	$207
Injection, morphine sulfate, preservative-free for epidural or intrathecal use, 10 mg	14	$143
Radiologic examination, chest; single view	38	$119
COMPREHENSIVE METABOLIC PANEL	124	$61

2019

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Largest Medicaid services in 2019

EMERGENCY DEPT VISIT MOD MDM	893	$71,046
EMERGENCY DEPT VISIT LOW MDM	694	$57,283
EMERGENCY DEPARTMENT VISIT HIGH MDM	587	$47,023
Intravenous infusion, hydration; each additional hour (List separately in addition to code for primary procedure)	206	$37,268
COMPREHENSIVE METABOLIC PANEL	352	$6,840
EMERGENCY DEPARTMENT VISIT STRAIGHTFORWARD MDM	81	$6,793
CT ABDOMEN & PELVIS W/CONTRAST MATERIAL	16	$3,852
Basic metabolic panel (Calcium, total) This panel must include the following: Calcium, total (82310) Carbon dioxide (bicarbonate) (82374) Chloride (82435) Creatinine (82565) Glucose (82947) Potassium (84132) Sodium (84295) Urea nitrogen (BUN) (84520)	223	$3,497
Therapeutic, prophylactic, or diagnostic injection (specify substance or drug); intravenous push, single or initial substance/drug	311	$1,370
Troponin, quantitative	95	$1,300
Drug test(s), presumptive, any number of drug classes, any number of devices or procedures; by instrument chemistry analyzers (eg, utilizing immunoassay [eg, EIA, ELISA, EMIT, FPIA, IA, KIMS, RIA]), chromatography (eg, GC, HPLC), and mass spectrometry either with or without chromatography, (eg, DART, DESI, GC-MS, GC-MS/MS, LC-MS, LC-MS/MS, LDTD, MALDI, TOF) includes sample validation when performed, per date of service	70	$1,253
HEPATIC FUNCTION PANEL	130	$897

2018

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Largest Medicaid services in 2018

EMERGENCY DEPT VISIT MOD MDM	334	$25,343
EMERGENCY DEPT VISIT LOW MDM	297	$23,744
EMERGENCY DEPARTMENT VISIT HIGH MDM	137	$14,683
Intravenous infusion, hydration; each additional hour (List separately in addition to code for primary procedure)	65	$11,609
EMERGENCY DEPARTMENT VISIT STRAIGHTFORWARD MDM	42	$3,314
COMPREHENSIVE METABOLIC PANEL	117	$2,374
Troponin, quantitative	59	$1,012
Radiologic examination, chest; 2 views	69	$397
Electrocardiogram, routine ECG with at least 12 leads; tracing only, without interpretation and report	68	$317
Gonadotropin, chorionic (hCG); qualitative	65	$146
Blood count; complete (CBC), automated (Hgb, Hct, RBC, WBC and platelet count) and automated differential WBC count	119	$110
Culture, bacterial; quantitative colony count, urine	36	$28

Drugs they prescribed that Part D paid

$2,056

Pharmacies billed $2,056 in 2024.

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

Opioids were 11% of their Part D prescriptions (17 of 150) in 2024. At or below the middle of the specialty; the typical emergency medicine clinician is at 12%.

134 generic and 16 brand-name prescriptions · $2,056 in drug cost · 47 antibiotic prescriptions to 45 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.

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Largest Part D drug costs

Ondansetron Odt	21	$201	$10
Cephalexin	13	$101	$8
Hydrocodone-Acetaminophen	14	$58	$4

Year by year

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Part D prescribing by year

2024	150	91	11% (17)	11%	$2,056
2023	74	48	None	None	$1,764
2022	81	60	21% (17)	None	$1,097
2021	49	35	None	None	$1,278
2020	112	72	19% (21)	10%	$1,366
2019	201	131	15% (31)	9%	$5,799
2018	149	98	21% (31)	None	$2,168
2017	147	88	20% (29)	10%	$3,601
2016	142	90	20% (29)	13%	$3,622
2015	159	109	22% (35)	13%	$2,786
2014	123	81	25% (31)	10%	$2,024
2013	99	66	28% (28)	15%	$2,679

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

See the drugs prescribed each year

2020: 3 drugs

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Part D drugs prescribed in 2020

Ondansetron	16	$111	$7
Hydrocodone-Acetaminophen	16	$70	$4
Naproxen	15	$44	$3

2019: 5 drugs

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Part D drugs prescribed in 2019

Naproxen	36	$227	$6
Ondansetron	27	$214	$8
Nitrofurantoin Mono-Macro	11	$187	$17
Hydrocodone-Acetaminophen	18	$93	$5
Prednisone	11	$50	$5

2018: 3 drugs

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Part D drugs prescribed in 2018

Naproxen	25	$152	$6
Oxycodone-Acetaminophen	15	$108	$7
Ondansetron	13	$86	$7

2017: 3 drugs

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Part D drugs prescribed in 2017

Ondansetron	20	$136	$7
Cephalexin	13	$81	$6
Oxycodone-Acetaminophen	13	$52	$4

2016: 3 drugs

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Part D drugs prescribed in 2016

Ondansetron	16	$114	$7
Oxycodone-Acetaminophen	14	$91	$6
Hydrocodone-Acetaminophen	12	$66	$5

2015: 5 drugs

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Part D drugs prescribed in 2015

Oxycodone-Acetaminophen	20	$137	$7
Ondansetron	14	$122	$9
Cephalexin	18	$89	$5
Azithromycin	11	$72	$7
Hydrocodone-Acetaminophen	13	$68	$5

2014: 3 drugs

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Part D drugs prescribed in 2014

Oxycodone-Acetaminophen	17	$160	$9
Cephalexin	15	$83	$6
Hydrocodone-Acetaminophen	12	$60	$5

2013: 2 drugs

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Part D drugs prescribed in 2013

Cephalexin	12	$110	$9
Hydrocodone-Acetaminophen	13	$80	$6

Money from drug and device companies

$14 in 2021

A payment is not proof that care is biased.

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Payments by company

Boston Scientific	Watchman	$14	1 payment Meals for Watchman · 2021-03-03 · $14

See the published payment

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Every published payment

Boston Scientific	Meals · 2021-03-03	Watchman	$14

Checkups this office reported

Medicare did not publish checkup rates for this clinician.

Medicare’s overall office score: 93.1 / 100; Scores the office’s reporting and systems. It is not a grade for how the doctor treats you.

Professional record

NPI: 1285801704
Licence: CA C171586, MO 2011026835, NY 247695, UT 7277539-1205, WY 9628ACalifornia C171586: Current · expires 2027-02-28
Trained: George Washington University School of Medicine, 2006
Group: Stanford Health Care · North Valley Emergency Physicians Lc
Gender: Male

More record details

Sole proprietor: No
Taxonomy: Federal specialty code 207P00000X (207P00000X)
Mailing address: 300 Pasteur Dr, Stanford, CA, 94305
NPI first listed: 2008-05-14
NPI last updated: 2024-03-19
NPI record certified: 2024-03-19

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

Extra NPI addresses: Division of Emergency Medicine, Salt Lake City, UT, 84132