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Dr. John R. Tretter, MD

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Specializes in: Adult Cardiology

Autonomous University of Guadalajara Faculty of Medicine

803 N Salk Drive
Casa Grande, AZ 85122

(480) 814-0266

Dr. John R. Tretter, MD is a cardiologist in Chandler, AZ specializing in adult cardiology. He graduated from Autonomous University of Guadalajara Faculty of Medicine. Dr. John R. Tretter, MD is affiliated with Dignity Health, Chandler Regional Medical Center and Dignity Health Arizona.

Office Locations

77 S Dobson Road
Chandler, AZ 85224

open_in_new

Dignity Health Arizona

803 N Salk Drive
Casa Grande, AZ 85122

(480) 814-0266

(480) 814-0018

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Noteworthy Medicare Patient Procedures Performed by Dr. John R. Tretter, MD in 2023

Click on any procedure below to see further details on volume and pricing among Medicare patients.

Top 10%

By Volume:

Doppler echocardiography

stress EKG

By Affordability:

hospital care

inpatient care

inpatient hospital care

In 2023, among providers in related specialties within Arizona, Dr. John R. Tretter, MD performed more Doppler echocardiography, and stress EKG procedures for Medicare patients than 90% of them and he also had a list price for hospital care, inpatient care, and inpatient hospital care (for patient admitted to hospital) that was lower than the list prices billed to Medicare by 90% of them. Actual amounts paid by patients can vary widely depending on a number of factors, including insurance coverage. A lower list price, however, might mean lower fees when paying without insurance.

Top 25%

By Volume:

cardiac procedures

echocardiogram

inpatient hospital care

ultrasound

By Affordability:

transesophageal echocardiography

transthoracic echocardiography

In 2012, among providers in related specialties within Arizona, Dr. John R. Tretter, MD performed more cardiac procedures, echocardiogram (echo), inpatient hospital care (for patient admitted to hospital), and ultrasound (sonogram) procedures for Medicare patients than 75% of them and he also had a list price for cardiac imaging, echocardiogram (echo), electrocardiogram (EKG), stress EKG, transesophageal echocardiography (TEE), and transthoracic echocardiography (TTE) that was lower than the list prices billed to Medicare by 75% of them. Actual amounts paid by patients can vary widely depending on a number of factors, including insurance coverage. A lower list price, however, might mean lower fees when paying without insurance.

Medicare Procedure and Patient Information

2012 Medicare Procedure Volume

The top procedures that Dr. John R. Tretter, MD treated as a cardiologist in Chandler, AZ during 2012 were hospital care, cardiac procedures, inpatient care and stress testing.

Volume of procedures performed by Dr. John R. Tretter, MD for Medicare patients.

ambulatory monitoring	13
cardiac procedures	871
catheterization	11
diagnostic procedures	11
doctor visit	859
hospital care	879
inpatient care	738
lab tests	134
minimally invasive procedures	25
nuclear scan	41
outpatient care	141
stress testing	449
ultrasound (sonogram)	398
vascular procedures	11

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. John R. Tretter, MD treated as a cardiologist in Chandler, AZ during 2013 were hospital care, cardiac procedures, inpatient care and stress testing.

Volume of procedures performed by Dr. John R. Tretter, MD for Medicare patients.

ambulatory monitoring	20
cardiac procedures	870
doctor visit	1020
hospital care	886
inpatient care	784
lab tests	212
nuclear scan	23
outpatient care	102
stress testing	466
ultrasound (sonogram)	384

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. John R. Tretter, MD.

**Gender**
Male	589
Female	487

**Ethnicity**
Non-Hispanic White	900
Black	35
Hispanic	89
Asian	0
Other	0
Native American	40

**Age**
From 65 to 74	421
From 75 to 84	421
85 and over	135
Less than 65	99

Conditions of Medicare patients treated by Dr. John R. Tretter, MD in 2013

Hypertension	75
High Cholesterol	71
Stroke	8
Ischemic Heart Disease	63
Depression	17
Chronic Kidney Disease	30
Asthma	11
Osteoperosis	8
Atrial Fibrilation	36
Heart Failure	35
Chronic Obstructive Pulmonary Disease	29
Diabetes	38
Dementia	13
Cancer	13

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. John R. Tretter, MD treated as a cardiologist in Chandler, AZ during 2014 were cardiac procedures, hospital care, inpatient care and stress testing.

Volume of procedures performed by Dr. John R. Tretter, MD for Medicare patients.

cardiac procedures	900
cardioversion	12
catheterization	11
diagnostic procedures	11
doctor visit	1099
hospital care	782
inpatient care	674
lab tests	413
minimally invasive procedures	36
nuclear scan	22
outpatient care	108
stress testing	511
ultrasound (sonogram)	378
vascular procedures	11

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. John R. Tretter, MD.

**Gender**
Male	564
Female	499

**Ethnicity**
Non-Hispanic White	893
Black	30
Hispanic	92
Asian	0
Other	0
Native American	37

**Age**
From 65 to 74	416
From 75 to 84	424
85 and over	134
Less than 65	89

Conditions of Medicare patients treated by Dr. John R. Tretter, MD in 2014

Hypertension	75
High Cholesterol	71
Stroke	10
Ischemic Heart Disease	59
Depression	15
Chronic Kidney Disease	29
Asthma	11
Osteoperosis	6
Atrial Fibrilation	34
Heart Failure	30
Chronic Obstructive Pulmonary Disease	26
Diabetes	37
Dementia	12
Cancer	15

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. John R. Tretter, MD treated as a cardiologist in Chandler, AZ during 2015 were cardiac procedures, hospital care, inpatient care and ultrasound (sonogram).

Volume of procedures performed by Dr. John R. Tretter, MD for Medicare patients.

cardiac procedures	842
cardioversion	13
doctor visit	1021
hospital care	813
inpatient care	636
minimally invasive procedures	24
nuclear scan	17
outpatient care	177
stress testing	352
ultrasound (sonogram)	490

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. John R. Tretter, MD.

**Gender**
Male	1110
Female	1008

**Ethnicity**
Non-Hispanic White	1750
Black	0
Hispanic	210
Asian	0
Other	0
Native American	76

**Age**
From 65 to 74	868
From 75 to 84	790
85 and over	304
Less than 65	156

Conditions of Medicare patients treated by Dr. John R. Tretter, MD in 2015

Hypertension	75
High Cholesterol	69
Stroke	9
Ischemic Heart Disease	60
Depression	18
Chronic Kidney Disease	35
Asthma	18
Osteoperosis	6
Atrial Fibrilation	30
Heart Failure	35
Chronic Obstructive Pulmonary Disease	27
Diabetes	37
Dementia	13
Cancer	13

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. John R. Tretter, MD treated as a cardiologist in Chandler, AZ during 2016 were cardiac procedures, hospital care, inpatient care and ultrasound (sonogram).

Volume of procedures performed by Dr. John R. Tretter, MD for Medicare patients.

cardiac procedures	960
cardioversion	14
doctor visit	1165
hospital care	748
inpatient care	579
minimally invasive procedures	22
nuclear scan	12
outpatient care	169
stress testing	398
ultrasound (sonogram)	562

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. John R. Tretter, MD.

**Gender**
Male	583
Female	557

**Ethnicity**
Non-Hispanic White	942
Black	25
Hispanic	118
Asian	0
Other	0
Native American	39

**Age**
From 65 to 74	467
From 75 to 84	434
85 and over	157
Less than 65	82

Conditions of Medicare patients treated by Dr. John R. Tretter, MD in 2016

Hypertension	75
High Cholesterol	69
Stroke	10
Ischemic Heart Disease	58
Depression	18
Chronic Kidney Disease	41
Asthma	29
Osteoperosis	6
Atrial Fibrilation	28
Heart Failure	31
Chronic Obstructive Pulmonary Disease	27
Diabetes	38
Dementia	13
Cancer	16

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. John R. Tretter, MD treated as a cardiologist in Chandler, AZ during 2017 were cardiac procedures, hospital care, ultrasound (sonogram) and inpatient care.

Volume of procedures performed by Dr. John R. Tretter, MD for Medicare patients.

cardiac procedures	1084
doctor visit	1098
hospital care	770
inpatient care	622
minimally invasive procedures	16
nuclear scan	61
outpatient care	148
stress testing	413
ultrasound (sonogram)	671

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. John R. Tretter, MD.

**Gender**
Male	658
Female	536

**Ethnicity**
Non-Hispanic White	996
Black	34
Hispanic	101
Asian	0
Other	0
Native American	42

**Age**
From 65 to 74	465
From 75 to 84	467
85 and over	180
Less than 65	82

Conditions of Medicare patients treated by Dr. John R. Tretter, MD in 2017

Hypertension	75
High Cholesterol	67
Stroke	9
Ischemic Heart Disease	61
Depression	20
Chronic Kidney Disease	47
Asthma	9
Osteoperosis	8
Atrial Fibrilation	28
Heart Failure	33
Chronic Obstructive Pulmonary Disease	25
Diabetes	37
Dementia	14
Cancer	15

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. John R. Tretter, MD treated as a cardiologist in Chandler, AZ during 2018 were cardiac procedures, hospital care, inpatient care and ultrasound (sonogram).

Volume of procedures performed by Dr. John R. Tretter, MD for Medicare patients.

ambulatory monitoring	11
cardiac procedures	1100
doctor visit	1056
hospital care	812
inpatient care	707
minimally invasive procedures	22
nuclear scan	28
outpatient care	105
stress testing	390
ultrasound (sonogram)	699

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. John R. Tretter, MD.

**Gender**
Male	649
Female	557

**Ethnicity**
Non-Hispanic White	1010
Black	23
Hispanic	105
Asian	0
Other	0
Native American	42

**Age**
From 65 to 74	501
From 75 to 84	462
85 and over	160
Less than 65	83

Conditions of Medicare patients treated by Dr. John R. Tretter, MD in 2018

Hypertension	75
High Cholesterol	71
Stroke	8
Ischemic Heart Disease	56
Depression	18
Chronic Kidney Disease	46
Asthma	7
Osteoperosis	7
Atrial Fibrilation	26
Heart Failure	32
Chronic Obstructive Pulmonary Disease	22
Diabetes	39
Dementia	12
Cancer	14

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. John R. Tretter, MD treated as a cardiologist in Chandler, AZ during 2019 were cardiac procedures, hospital care, ultrasound (sonogram) and inpatient care.

Volume of procedures performed by Dr. John R. Tretter, MD for Medicare patients.

ambulatory monitoring	14
cardiac procedures	1117
cardioversion	12
doctor visit	1074
hospital care	691
inpatient care	626
minimally invasive procedures	25
nuclear scan	81
outpatient care	65
stress testing	436
ultrasound (sonogram)	667

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. John R. Tretter, MD.

**Gender**
Male	667
Female	526

**Ethnicity**
Non-Hispanic White	992
Black	28
Hispanic	99
Asian	0
Other	0
Native American	47

**Age**
From 65 to 74	513
From 75 to 84	460
85 and over	150
Less than 65	70

Conditions of Medicare patients treated by Dr. John R. Tretter, MD in 2019

Hypertension	75
High Cholesterol	73
Stroke	10
Ischemic Heart Disease	55
Depression	18
Chronic Kidney Disease	45
Asthma	8
Osteoperosis	7
Atrial Fibrilation	27
Heart Failure	31
Chronic Obstructive Pulmonary Disease	20
Diabetes	37
Dementia	11
Cancer	13

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. John R. Tretter, MD treated as a cardiologist in Chandler, AZ during 2020 were cardiac procedures, hospital care, inpatient care and ultrasound (sonogram).

Volume of procedures performed by Dr. John R. Tretter, MD for Medicare patients.

ambulatory monitoring	12
cardiac procedures	1028
cardioversion	17
doctor visit	903
hospital care	772
inpatient care	742
minimally invasive procedures	28
nuclear scan	89
outpatient care	30
stress testing	313
ultrasound (sonogram)	703

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. John R. Tretter, MD.

**Gender**
Male	629
Female	535

**Ethnicity**
Non-Hispanic White	959
Black	34
Hispanic	96
Asian	0
Other	0
Native American	48

**Age**
From 65 to 74	538
From 75 to 84	431
85 and over	126
Less than 65	69

Conditions of Medicare patients treated by Dr. John R. Tretter, MD in 2020

Hypertension	75
High Cholesterol	75
Stroke	10
Ischemic Heart Disease	52
Depression	20
Chronic Kidney Disease	45
Asthma	8
Osteoperosis	6
Atrial Fibrilation	26
Heart Failure	32
Chronic Obstructive Pulmonary Disease	20
Diabetes	38
Dementia	12
Cancer	12

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. John R. Tretter, MD treated as a cardiologist in Chandler, AZ during 2021 were cardiac procedures, ultrasound (sonogram), hospital care and inpatient care.

Volume of procedures performed by Dr. John R. Tretter, MD for Medicare patients.

ambulatory monitoring	22
cardiac procedures	1220
cardioversion	12
doctor visit	946
hospital care	626
inpatient care	595
minimally invasive procedures	20
nuclear scan	117
outpatient care	31
stress testing	403
ultrasound (sonogram)	795

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. John R. Tretter, MD.

**Gender**
Male	637
Female	616

**Ethnicity**
Non-Hispanic White	1048
Black	31
Hispanic	116
Asian	0
Other	0
Native American	31

**Age**
From 65 to 74	557
From 75 to 84	464
85 and over	149
Less than 65	83

Conditions of Medicare patients treated by Dr. John R. Tretter, MD in 2021

Hypertension	75
High Cholesterol	74
Stroke	11
Ischemic Heart Disease	51
Depression	19
Chronic Kidney Disease	45
Asthma	9
Osteoperosis	8
Atrial Fibrilation	23
Heart Failure	30
Chronic Obstructive Pulmonary Disease	16
Diabetes	38
Dementia	12
Cancer	11

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. John R. Tretter, MD treated as a cardiologist in Chandler, AZ during 2022 were cardiac procedures, ultrasound (sonogram), hospital care and inpatient care.

Volume of procedures performed by Dr. John R. Tretter, MD for Medicare patients.

cardiac procedures	1070
cardioversion	16
doctor visit	1000
hospital care	697
inpatient care	655
minimally invasive procedures	21
nuclear scan	47
outpatient care	42
stress testing	356
ultrasound (sonogram)	714

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. John R. Tretter, MD.

**Gender**
Male	621
Female	566

**Ethnicity**
Non-Hispanic White	999
Black	38
Hispanic	82
Asian	0
Other	0
Native American	34

**Age**
From 65 to 74	492
From 75 to 84	472
85 and over	151
Less than 65	72

Conditions of Medicare patients treated by Dr. John R. Tretter, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	14
Ischemic Heart Disease	43
Depression	17
Chronic Kidney Disease	33
Asthma	11
Osteoperosis	10
Atrial Fibrilation	36
Heart Failure	26
Chronic Obstructive Pulmonary Disease	20
Diabetes	37
Dementia	7
Cancer	17

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. John R. Tretter, MD for Medicare patients.

The highest averages for the top procedures that Dr. John R. Tretter, MD treated as a cardiologist in Chandler, AZ were cardiac procedures, hospital care, inpatient care and ultrasound (sonogram).

ambulatory monitoring	15
cardiac procedures	1005
cardioversion	13
catheterization	11
diagnostic procedures	11
doctor visit	1021
hospital care	770
inpatient care	668
lab tests	253
minimally invasive procedures	23
nuclear scan	48
outpatient care	101
stress testing	407
ultrasound (sonogram)	587
vascular procedures	11

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. John R. Tretter, MD.

**Gender**
Female	535
Male	609

**Ethnicity**
Black / African American	25
Asian / Pacific Islander	0
Non-Hispanic White	953
Hispanic	100
Native American / Alaskan Native	39
Other	0

**Age**
85 and over	149
75 to 84	438
Less than 65	80
65 to 74	476

Average of Total of Conditions of Medicare patients treated by Dr. John R. Tretter, MD From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. John R. Tretter, MD treated were hypertension, high cholesterol, ischemic heart disease and chronic kidney disease.

Hypertension	68
High Cholesterol	65
Stroke	9
Ischemic Heart Disease	50
Depression	16
Chronic Kidney Disease	36
Asthma	11
Osteoporosis	6
Heart Failure	28
Chronic Obstructive Pulmonary Disease	21
Diabetes	34
Atrial Fibrillation	26
Dementia	10
Cancer	12

Education & Training

Dr. John R. Tretter, MD graduated from Autonomous University of Guadalajara Faculty of Medicine. He is certified by the Internal Medicine Internal Medicine (Sub: Cardiovascular Disease) and has a state license in New York.

Medical School: Autonomous University of Guadalajara Faculty of Medicine

Board Certification: Internal Medicine Internal Medicine (Sub: Cardiovascular Disease)

Licensed In: New York

Affiliations & Hospitals

Dr. John R. Tretter, MD is associated with these hospitals and organizations:

Dignity Health

Chandler Regional Medical Center

Dignity Health Arizona

Insurance Information

Please note: Insurance information may change at any time, and the provider may accept your insurance plan even if it is not listed below. Please contact the provider's office to confirm that your insurance is accepted.

Dr. John R. Tretter, MD appears to accept the following insurance providers: Humana, Cigna, United Healthcare, TRICARE and First Health.

Insurance Accepted by Provider includes:

According to our sources, Dr. John R. Tretter, MD accepts the following insurance providers:

Humana

Cigna

United Healthcare

TRICARE

First Health

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General Payments

These charts describe general payments received by Dr. John R. Tretter, MD. Doctors may receive payments for a number of reasons, including meal compensation, travel compensation, and consulting.

**Payments by Company**
Medtronic Vascular, Inc.	$1,155 ClosureFast $1,128	VenaSeal $27
Merck Sharp & Dohme LLC	$549 VERQUVO $549
AstraZeneca Pharmaceuticals LP	$366 BRILINTA $319	FARXIGA $47
Novartis Pharmaceuticals Corporation	$324 LEQVIO $186	ENTRESTO $138
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)	$239 LifeVest $239
Other	$1,416 WATCHMAN $105	MitraClip $101	Repatha $100	XARELTO $98	ELIQUIS $84	Other $927

**Types of Payments**
Food and Beverage	$2,795
Travel and Lodging	$785
Education	$470

Biography

Dr. John Tretter is a specialist in adult cardiology. He works in Casa Grande, AZ and Chandler, AZ. Dr. Tretter seems to honor several insurance carriers, including Coventry, First Health, and Cigna. He attended medical school at Autonomous University of Guadalajara Faculty of Medicine. He is professionally affiliated with Chandler Regional Medical Center. He has an open panel in Casa Grande, AZ according to Dignity Health.