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Dr. Gregory C. Warner, MD

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Specializes in: Adult Pulmonology, Sleep Medicine and Adult Critical Care

University of Nebraska College of Medicine (1980)

Professional interests include: sleep disorders, lung issues, intensive care

1510 E Herndon Avenue Suite 210
Fresno, CA 93720

(559) 450-7041

Dr. Gregory C. Warner, MD is a pulmonologist in Fresno, CA specializing in adult pulmonology, sleep medicine and adult critical care. He graduated from University of Nebraska College of Medicine in 1980 and has 46 years of experience. Dr. Gregory C. Warner, MD is affiliated with Saint Agnes Medical Center, SAINT AGNES MEDICAL FOUNDATION and ADVENTIST HEALTH PHYSICIANS NETWORK.

Office Locations

1303 E Herndon Avenue Ms 485
Fresno, CA 93720

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Saint Agnes Medical Center

1510 E Herndon Avenue Suite 210
Fresno, CA 93720

(559) 450-7041

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5400 W Hillsdale Avenue
Visalia, CA 93291

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Some issues Dr. Gregory C. Warner, MD can help you with:

Lung Issues

Every cell in the body requires oxygen to function and produces carbon dioxide as a waste product. In order to keep the body's tissues constantly supplied with fresh oxygen and to keep waste from building up, the lungs pump air in and out, even while sleeping or unaware. Unfortunately, diseases and disorders affecting the lungs are some of the most common medical problems afflicting people around the world. Some of the most common lung problems include asthma, COPD, pneumonia, and lung cancer.

Asthma is a chronic disease where swollen, inflamed airways make it hard to breathe. It is often brought on by specific triggers. While asthma is a common condition, affecting millions of people, it can also be serious and even fatal in severe cases. Treatment involves avoiding triggers and using inhaled corticosteroid medications.

COPD, or Chronic Obstructive Pulmonary Disease, is the name given to two illnesses that both cause difficulty breathing: emphysema and chronic bronchitis. In emphysema, the air sacs of the lungs become damaged, while with bronchitis they become clogged with mucus. COPD is the fourth leading cause of death in the United States. It is almost always caused by breathing irritants into the lungs, such as smoking or heavy pollution.

Pneumonia is a lung infection that can be caused by bacteria, a virus, or fungi. Most healthy people recover from pneumonia in a week or two, but for some people pneumonia can be fatal. There are treatments available for pneumonia, but the best treatment is to prevent getting sick in the first place. People who are at risk should make sure they get a flu shot every year. There is also a vaccine available for the type of bacteria that causes pneumonia.

Lung cancer occurs when abnormal cells inside the lung grow into a tumor, destroying healthy tissue. Because it is so difficult to detect lung cancer in early stages when it has few symptoms, it is the deadliest form of cancer, responsible for the most cancer deaths both in the U.S. and worldwide. Most lung cancer is caused by exposure to tobacco smoke, but between 10-15% of cases are not linked to smoking.

Some problems with the lungs are minor and are not cause for concern. However if symptoms have lasted for a month or more, even if they are minor, it is worth checking with a healthcare professional. A cough, shortness of breath, or excess mucus production that lingers for weeks are all worth getting looked at.

Noteworthy Medicare Patient Procedures Performed by Dr. Gregory C. Warner, MD in 2023

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

Top 5%

By Affordability:

airway management

CPAP treatment

diagnostic sleep study

in-lab polysomnography

in-lab sleep study

polysomnography

sleep study

sleep study with CPAP

In 2023, Dr. Gregory C. Warner, MD had a list price for airway management, CPAP treatment, diagnostic (regular) sleep study, in-lab polysomnography (overnight sleep study), in-lab sleep study, polysomnography (PSG), sleep study, and sleep study with CPAP that was lower than the list prices billed to Medicare by 95% of providers in related specialties within California. 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 10%

By Volume:

endotracheal intubation

In 2023, Dr. Gregory C. Warner, MD performed more endotracheal intubation procedures for Medicare patients than 90% of providers in related specialties within California.

Top 25%

By Affordability:

endotracheal intubation

tracheal procedures

In 2012, Dr. Gregory C. Warner, MD had a list price for endotracheal intubation, and tracheal (windpipe) procedures that was lower than the list prices billed to Medicare by 75% of providers in related specialties within California. 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. Gregory C. Warner, MD treated as a pulmonologist in Fresno, CA during 2012 were hospital care, inpatient care, pulmonary testing and sleep study.

Volume of procedures performed by Dr. Gregory C. Warner, MD for Medicare patients.

airway management	95
aspiration	26
bronchoscopy	26
catheterization	48
doctor visit	442
hospital care	557
inpatient care	557
pulmonary testing	216
sleep study	139
tracheal (windpipe) procedures	21

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Gregory C. Warner, MD treated as a pulmonologist in Fresno, CA during 2013 were pulmonary testing, sleep study, airway management and hospital care.

Volume of procedures performed by Dr. Gregory C. Warner, MD for Medicare patients.

airway management	92
aspiration	35
bronchoscopy	35
catheterization	46
doctor visit	408
hospital care	84
inpatient care	84
pulmonary testing	152
sleep study	149
tracheal (windpipe) procedures	37

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory C. Warner, MD.

**Gender**
Male	406
Female	415

**Ethnicity**
Non-Hispanic White	537
Black	24
Hispanic	221
Asian	21
Other	0
Native American	0

**Age**
From 65 to 74	350
From 75 to 84	227
85 and over	103
Less than 65	141

Conditions of Medicare patients treated by Dr. Gregory C. Warner, MD in 2013

Hypertension	75
High Cholesterol	65
Stroke	10
Ischemic Heart Disease	63
Depression	30
Chronic Kidney Disease	43
Asthma	27
Osteoperosis	10
Atrial Fibrilation	17
Heart Failure	51
Chronic Obstructive Pulmonary Disease	52
Diabetes	49
Dementia	14
Cancer	13

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Gregory C. Warner, MD treated as a pulmonologist in Fresno, CA during 2014 were sleep study, hospital care, inpatient care and airway management.

Volume of procedures performed by Dr. Gregory C. Warner, MD for Medicare patients.

airway management	78
aspiration	16
bronchoscopy	46
catheterization	61
doctor visit	556
hospital care	97
inpatient care	97
minimally invasive procedures	19
pulmonary testing	76
sleep study	128
tracheal (windpipe) procedures	28

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory C. Warner, MD.

**Gender**
Male	429
Female	438

**Ethnicity**
Non-Hispanic White	553
Black	20
Hispanic	233
Asian	42
Other	0
Native American	0

**Age**
From 65 to 74	318
From 75 to 84	263
85 and over	116
Less than 65	170

Conditions of Medicare patients treated by Dr. Gregory C. Warner, MD in 2014

Hypertension	75
High Cholesterol	65
Stroke	11
Ischemic Heart Disease	67
Depression	28
Chronic Kidney Disease	50
Asthma	25
Osteoperosis	9
Atrial Fibrilation	17
Heart Failure	54
Chronic Obstructive Pulmonary Disease	48
Diabetes	51
Dementia	14
Cancer	13

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Gregory C. Warner, MD treated as a pulmonologist in Fresno, CA during 2015 were sleep study, hospital care, inpatient care and airway management.

Volume of procedures performed by Dr. Gregory C. Warner, MD for Medicare patients.

airway management	115
aspiration	13
bronchoscopy	24
catheterization	55
doctor visit	666
hospital care	175
inpatient care	175
minimally invasive procedures	11
pulmonary testing	108
sleep study	188
tracheal (windpipe) procedures	33

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory C. Warner, MD.

**Gender**
Male	844
Female	888

**Ethnicity**
Non-Hispanic White	1142
Black	36
Hispanic	470
Asian	58
Other	0
Native American	0

**Age**
From 65 to 74	720
From 75 to 84	518
85 and over	190
Less than 65	304

Conditions of Medicare patients treated by Dr. Gregory C. Warner, MD in 2015

Hypertension	75
High Cholesterol	67
Stroke	16
Ischemic Heart Disease	62
Depression	32
Chronic Kidney Disease	48
Asthma	38
Osteoperosis	11
Atrial Fibrilation	17
Heart Failure	51
Chronic Obstructive Pulmonary Disease	47
Diabetes	46
Dementia	15
Cancer	12

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Gregory C. Warner, MD treated as a pulmonologist in Fresno, CA during 2016 were hospital care, inpatient care, sleep study and pulmonary testing.

Volume of procedures performed by Dr. Gregory C. Warner, MD for Medicare patients.

airway management	87
bronchoscopy	12
catheterization	41
doctor visit	679
hospital care	184
inpatient care	184
minimally invasive procedures	12
pulmonary testing	92
sleep study	158
tracheal (windpipe) procedures	23

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory C. Warner, MD.

**Gender**
Male	385
Female	372

**Ethnicity**
Non-Hispanic White	511
Black	16
Hispanic	189
Asian	22
Other	0
Native American	0

**Age**
From 65 to 74	351
From 75 to 84	215
85 and over	80
Less than 65	111

Conditions of Medicare patients treated by Dr. Gregory C. Warner, MD in 2016

Hypertension	75
High Cholesterol	68
Stroke	11
Ischemic Heart Disease	61
Depression	27
Chronic Kidney Disease	52
Asthma	54
Osteoperosis	9
Atrial Fibrilation	17
Heart Failure	47
Chronic Obstructive Pulmonary Disease	49
Diabetes	46
Dementia	17
Cancer	12

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Gregory C. Warner, MD treated as a pulmonologist in Fresno, CA during 2017 were pulmonary testing, sleep study, hospital care and inpatient care.

Volume of procedures performed by Dr. Gregory C. Warner, MD for Medicare patients.

airway management	78
aspiration	13
bronchoscopy	28
catheterization	45
doctor visit	600
hospital care	99
inpatient care	99
minimally invasive procedures	15
pulmonary testing	208
sleep study	129
tracheal (windpipe) procedures	29

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory C. Warner, MD.

**Gender**
Male	395
Female	393

**Ethnicity**
Non-Hispanic White	543
Black	15
Hispanic	192
Asian	20
Other	0
Native American	0

**Age**
From 65 to 74	319
From 75 to 84	254
85 and over	104
Less than 65	111

Conditions of Medicare patients treated by Dr. Gregory C. Warner, MD in 2017

Hypertension	75
High Cholesterol	60
Stroke	10
Ischemic Heart Disease	59
Depression	31
Chronic Kidney Disease	52
Asthma	25
Osteoperosis	10
Atrial Fibrilation	18
Heart Failure	48
Chronic Obstructive Pulmonary Disease	51
Diabetes	44
Dementia	18
Cancer	11

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Gregory C. Warner, MD treated as a pulmonologist in Fresno, CA during 2018 were pulmonary testing, sleep study, airway management and hospital care.

Volume of procedures performed by Dr. Gregory C. Warner, MD for Medicare patients.

airway management	91
bronchoscopy	16
catheterization	36
doctor visit	763
hospital care	87
inpatient care	87
pulmonary testing	312
sleep study	134
tracheal (windpipe) procedures	41

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory C. Warner, MD.

**Gender**
Male	385
Female	427

**Ethnicity**
Non-Hispanic White	560
Black	17
Hispanic	211
Asian	13
Other	0
Native American	0

**Age**
From 65 to 74	331
From 75 to 84	269
85 and over	101
Less than 65	111

Conditions of Medicare patients treated by Dr. Gregory C. Warner, MD in 2018

Hypertension	75
High Cholesterol	68
Stroke	11
Ischemic Heart Disease	58
Depression	27
Chronic Kidney Disease	52
Asthma	19
Osteoperosis	10
Atrial Fibrilation	18
Heart Failure	44
Chronic Obstructive Pulmonary Disease	44
Diabetes	47
Dementia	17
Cancer	11

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Gregory C. Warner, MD treated as a pulmonologist in Fresno, CA during 2019 were pulmonary testing, sleep study, airway management and tracheal (windpipe) procedures.

Volume of procedures performed by Dr. Gregory C. Warner, MD for Medicare patients.

airway management	100
aspiration	19
bronchoscopy	19
catheterization	17
doctor visit	639
hospital care	15
inpatient care	15
pulmonary testing	465
sleep study	139
tracheal (windpipe) procedures	20

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory C. Warner, MD.

**Gender**
Male	420
Female	500

**Ethnicity**
Non-Hispanic White	626
Black	25
Hispanic	219
Asian	30
Other	0
Native American	0

**Age**
From 65 to 74	356
From 75 to 84	322
85 and over	133
Less than 65	109

Conditions of Medicare patients treated by Dr. Gregory C. Warner, MD in 2019

Hypertension	75
High Cholesterol	69
Stroke	9
Ischemic Heart Disease	56
Depression	27
Chronic Kidney Disease	50
Asthma	20
Osteoperosis	11
Atrial Fibrilation	20
Heart Failure	44
Chronic Obstructive Pulmonary Disease	47
Diabetes	44
Dementia	15
Cancer	12

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Gregory C. Warner, MD treated as a pulmonologist in Fresno, CA during 2020 were pulmonary testing, sleep study, airway management and catheterization.

Volume of procedures performed by Dr. Gregory C. Warner, MD for Medicare patients.

airway management	53
catheterization	13
doctor visit	316
hospital care	13
inpatient care	13
pulmonary testing	108
sleep study	73
tracheal (windpipe) procedures	13

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory C. Warner, MD.

**Gender**
Male	309
Female	311

**Ethnicity**
Non-Hispanic White	404
Black	18
Hispanic	152
Asian	29
Other	0
Native American	0

**Age**
From 65 to 74	217
From 75 to 84	231
85 and over	84
Less than 65	88

Conditions of Medicare patients treated by Dr. Gregory C. Warner, MD in 2020

Hypertension	75
High Cholesterol	71
Stroke	9
Ischemic Heart Disease	58
Depression	29
Chronic Kidney Disease	59
Asthma	18
Osteoperosis	13
Atrial Fibrilation	17
Heart Failure	48
Chronic Obstructive Pulmonary Disease	45
Diabetes	49
Dementia	20
Cancer	12

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Gregory C. Warner, MD treated as a pulmonologist in Fresno, CA during 2021 were sleep study, airway management, pulmonary testing and tracheal (windpipe) procedures.

Volume of procedures performed by Dr. Gregory C. Warner, MD for Medicare patients.

airway management	37
catheterization	21
doctor visit	276
hospital care	14
inpatient care	14
pulmonary testing	32
sleep study	60
tracheal (windpipe) procedures	22

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory C. Warner, MD.

**Gender**
Male	222
Female	270

**Ethnicity**
Non-Hispanic White	326
Black	0
Hispanic	115
Asian	29
Other	11
Native American	0

**Age**
From 65 to 74	197
From 75 to 84	164
85 and over	66
Less than 65	65

Conditions of Medicare patients treated by Dr. Gregory C. Warner, MD in 2021

Hypertension	75
High Cholesterol	75
Stroke	11
Ischemic Heart Disease	55
Depression	30
Chronic Kidney Disease	58
Asthma	18
Osteoperosis	12
Atrial Fibrilation	15
Heart Failure	43
Chronic Obstructive Pulmonary Disease	44
Diabetes	46
Dementia	17
Cancer	13

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Gregory C. Warner, MD treated as a pulmonologist in Fresno, CA during 2022 were hospital care, inpatient care, sleep study and pulmonary testing.

Volume of procedures performed by Dr. Gregory C. Warner, MD for Medicare patients.

airway management	56
aspiration	16
bronchoscopy	16
catheterization	30
doctor visit	375
hospital care	97
inpatient care	97
pulmonary testing	78
resuscitation	11
sleep study	91
tracheal (windpipe) procedures	40

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Gregory C. Warner, MD.

**Gender**
Male	291
Female	291

**Ethnicity**
Non-Hispanic White	382
Black	15
Hispanic	133
Asian	40
Other	0
Native American	0

**Age**
From 65 to 74	244
From 75 to 84	218
85 and over	73
Less than 65	47

Conditions of Medicare patients treated by Dr. Gregory C. Warner, MD in 2022

Hypertension	75
High Cholesterol	75
Stroke	16
Ischemic Heart Disease	46
Depression	27
Chronic Kidney Disease	43
Asthma	24
Osteoperosis	18
Atrial Fibrilation	31
Heart Failure	38
Chronic Obstructive Pulmonary Disease	47
Diabetes	44
Dementia	12
Cancer	16

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Gregory C. Warner, MD for Medicare patients.

The highest averages for the top procedures that Dr. Gregory C. Warner, MD treated as a pulmonologist in Fresno, CA were pulmonary testing, hospital care, inpatient care and sleep study.

airway management	80
aspiration	19
bronchoscopy	24
catheterization	37
doctor visit	520
hospital care	129
inpatient care	129
minimally invasive procedures	14
pulmonary testing	167
resuscitation	11
sleep study	126
tracheal (windpipe) procedures	27

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Gregory C. Warner, MD.

**Gender**
Male	371
Female	391

**Ethnicity**
Black / African American	16
Asian / Pacific Islander	27
Non-Hispanic White	507
Hispanic	194
Native American / Alaskan Native	0
Other	1

**Age**
75 to 84	243
85 and over	95
Less than 65	114
65 to 74	309

Average of Total of Conditions of Medicare patients treated by Dr. Gregory C. Warner, MD From 2012 - 2022

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

Hypertension	68
High Cholesterol	62
Stroke	10
Ischemic Heart Disease	53
Depression	26
Chronic Kidney Disease	46
Asthma	24
Osteoporosis	10
Heart Failure	42
Chronic Obstructive Pulmonary Disease	43
Diabetes	42
Atrial Fibrillation	17
Cancer	11
Dementia	14

Education & Training

Dr. Gregory C. Warner, MD graduated from University of Nebraska College of Medicine in 1980. He completed residency at University of Wisconsin Affiliated Hospitals. He is certified by the Internal Medicine, Internal Medicine, American Board and has a state license in California.

Medical School: University of Nebraska College of Medicine (1980)

Residency: University of Wisconsin Affiliated Hospitals (1985)

Board Certification: Internal Medicine, Internal Medicine, American Board (1987)

Licensed In: California

Affiliations & Hospitals

Dr. Gregory C. Warner, MD is associated with these hospitals and organizations:

Saint Agnes Medical Center

SAINT AGNES MEDICAL FOUNDATION

ADVENTIST HEALTH PHYSICIANS NETWORK

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General Payments

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

**Payments by Company**
GlaxoSmithKline, LLC.	$1,951 TRELEGY ELLIPTA $896	ANORO $695	BREO $155	ANORO ELLIPTA $126	NUCALA $43	Other $37
Boehringer Ingelheim Pharmaceuticals, Inc.	$1,223 SPIRIVA RESPIMAT $823	OFEV $189	STIOLTO $115	COMBIVENT RESPIMAT $82	STIOLTO RESPIMAT $14
AstraZeneca Pharmaceuticals LP	$236 SYMBICORT $85	BREZTRI $43	AIRSUPRA $25	BEVESPI AEROSPHERE $23	TEZSPIRE $17	Other $44
Mylan Specialty L.P.	$236 Yupelri $136	Perforomist $100
Sunovion Pharmaceuticals Inc.	$170 Brovana $121	Lonhala Magnair $49
Other	$1,574 DUPIXENT $177	CT THROMBECTOMY SYSTEM KIT $149	Impella $145	Esbriet $138	Da Vinci Surgical System $90	Other $875

**Types of Payments**
Food and Beverage	$5,386
Education	$5

Biography

Dr. Gregory Warner is a physician who specializes in adult critical care, general practice, and sleep medicine. He attended the University of Nebraska College of Medicine and the University of Wisconsin School of Medicine and Public Health and then went on to complete his residency at a hospital affiliated with the University of Wisconsin. Dr. Warner's areas of clinical interest consist of sleep disorders, intensive care, and internal medicine. He is professionally affiliated with Saint Agnes Medical Center.