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Dr. Greg J. Davis, MD

Accepting New Patients

(216 Ratings)

Specializes in: Adult Pulmonology and Critical Care (Intensive Care Medicine)

University of Iowa, Carver College of Medicine

Professional interests include: tuberculosis (TB), bronchiectasis, bronchitis, and more.

523 N 3rd Street
Brainerd, MN 56401

(218) 829-2861

Dr. Greg J. Davis, MD is a pulmonologist in Brainerd, MN specializing in adult pulmonology and critical care (intensive care medicine). He graduated from University of Iowa, Carver College of Medicine. Dr. Greg J. Davis, MD is affiliated with Essentia Health.

Office Locations

2024 S 6th Street
Brainerd, MN 56401

open_in_new

Essentia Health

523 N 3rd Street
Brainerd, MN 56401

(218) 829-2861

(218) 828-3103

open_in_new

Some issues Dr. Greg J. Davis, MD can help you with:

Asthma

Asthma is a chronic lung disease where the tissue and airways of the lungs become extremely sensitive to certain substances. When these substances are breathed in, the lungs become inflamed. The muscles around the airways tighten and squeeze the lungs, and passages within the lungs swell and tighten. The airways themselves produce mucus, which further clogs the tightened, swollen airways. A person having an asthma attack finds it very difficult to breathe, and a severe attack can even be fatal.

Asthma affects people of all ages, but people with asthma are most often diagnosed as children. Symptoms can include wheezing, a tight feeling in the chest, shortness of breath, and coughing. Some people have mild symptoms all the time, and some people have no symptoms at all, but everyone with asthma is susceptible to occasional severe attacks or flare-ups of symptoms when they are exposed to triggers. Triggers vary widely but can include:

Allergens (dust mites, pet fur, mold, pollen, grass)
Irritants (smoke, pollution, dust, chemicals)
Viral infections
Physical activity, especially outdoors
Certain medications or chemicals in foods (aspirin, sulfites)

Treatment for most asthma patients involves three steps. Patients learn what their asthma triggers are and avoid them. They take a daily control medication, usually an inhaled corticosteroid, to reduce inflammation in the lungs. Also, they have rescue medication with them at all times to take in case of a severe attack. These quick-acting inhaled medications relax the muscles around the airways and allow the lungs to open up for air.

There is no cure for asthma, but with treatment it should not interfere with daily life and activities.

Heart Problems

The heart is one of the most important organs in the body. This smooth muscle expands and contracts rhythmically an entire lifetime, pumping blood to the lungs and then to every other cell in the body. When heart problems occur, it becomes difficult for the body to get the nutrients and oxygen it needs via the blood. So while there are a variety of illnesses and disorders that affect the heart, most of them cause weakness, exhaustion and shortness of breath. The most common heart conditions include heart disease, angina, arrhythmia, and valve disorders.

Heart disease is the leading cause of death in the United States for both men and women. This includes coronary artery disease, heart attacks, congestive heart failure, and congenital heart disease. Some conditions, such as genetics, cannot be controlled. But there are many other things one can do to lower their risk for heart disease. Controlling high blood pressure and cholesterol levels, reducing or stopping smoking, exercising more and losing weight if needed, and eating a diet low in sodium can all protect the heart.

Angina is a squeezing type of chest pain that happens when the muscles around the heart don't get enough oxygen. It can be regular or infrequent. Usually, angina is caused by coronary heart disease. However, not all chest pain is angina. Chest pain can also be caused by a lung infection or panic attack, for example, so it is important to have any sudden pain checked.

Arrhythmia is the word for when the heart beats too fast, too slow, or irregularly with skipped beats. It can feel frightening, and depending on the type it can be dangerous, but in most cases arrhythmia is not serious and can be treated. It is very common, especially in older adults.

Heart valve problems can happen in any one of the the heart's four valves that keep blood flowing where it needs to go. Babies can be born with problems in their heart valves, or valves can be damaged by infections. The valves can stiffen and become less mobile, or they can stop closing properly and 'leak' when the heart beats. Valve problems can usually be repaired surgically.

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.

In The News (see more mentions in the news)

“Dr. Greg Davis of Essentia Health said morale among his hospital team was high at that time - they were working to save lives on a daily basis - but it was frustrating after the vaccines became...”—"Publisher's Note: Reflections on Five Years Since the Pandemic (from KAXE Radio)", Minnesota Women's Press, March 2025

“"We don't have any ICU capacity right now - in fact, we don't have any hospital capacity," said Dr. Greg Davis.”—"ICU, hospital beds at capacity in Brainerd", Brainerd Dispatch, December 2021

“When Dr. Greg Davis looks for an analogy to express the difference between being vaccinated against COVID-19 and facing a rise in cases without that protection, he turns to boxes of colorful candy.”—"COVID-19 cases surge across central Minnesota region", Brainerd Dispatch, November 2021

Noteworthy Medicare Patient Procedures Performed by Dr. Greg J. Davis, MD in 2023

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

Top 25%

By Volume:

pulmonary function test

By Affordability:

lung diffusion capacity test

lung volume test

pulmonary function test

pulmonary testing

In 2012, among providers in related specialties within Minnesota, Dr. Greg J. Davis, MD performed more pulmonary function test (PFT) procedures for Medicare patients than 75% of them and he also had a list price for lung diffusion capacity test (DLCO), lung volume test, pulmonary function test (PFT), and pulmonary testing 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. Greg J. Davis, MD treated as a pulmonologist in Brainerd, MN during 2012 were pulmonary testing, hospital care and inpatient care.

Volume of procedures performed by Dr. Greg J. Davis, MD for Medicare patients.

doctor visit	624
hospital care	208
inpatient care	208
pulmonary testing	275

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Greg J. Davis, MD treated as a pulmonologist in Brainerd, MN during 2013 were pulmonary testing, hospital care and inpatient care.

Volume of procedures performed by Dr. Greg J. Davis, MD for Medicare patients.

doctor visit	610
hospital care	172
inpatient care	172
pulmonary testing	357

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Greg J. Davis, MD.

**Gender**
Male	191
Female	227

**Age**
From 65 to 74	110
From 75 to 84	153
85 and over	73
Less than 65	82

Conditions of Medicare patients treated by Dr. Greg J. Davis, MD in 2013

Hypertension	70
High Cholesterol	50
Stroke	4
Ischemic Heart Disease	44
Depression	27
Chronic Kidney Disease	32
Asthma	16
Osteoperosis	9
Atrial Fibrilation	19
Heart Failure	28
Chronic Obstructive Pulmonary Disease	59
Diabetes	28
Dementia	4
Cancer	17

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Greg J. Davis, MD treated as a pulmonologist in Brainerd, MN during 2014 were pulmonary testing, hospital care, inpatient care and bronchoscopy.

Volume of procedures performed by Dr. Greg J. Davis, MD for Medicare patients.

bronchoscopy	11
diagnostic procedures	11
doctor visit	637
hospital care	215
inpatient care	215
minimally invasive procedures	11
pulmonary testing	358

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Greg J. Davis, MD.

**Gender**
Male	207
Female	199

**Age**
From 65 to 74	120
From 75 to 84	142
85 and over	60
Less than 65	84

Conditions of Medicare patients treated by Dr. Greg J. Davis, MD in 2014

Hypertension	72
High Cholesterol	54
Stroke	0
Ischemic Heart Disease	42
Depression	25
Chronic Kidney Disease	33
Asthma	15
Osteoperosis	10
Atrial Fibrilation	23
Heart Failure	31
Chronic Obstructive Pulmonary Disease	61
Diabetes	32
Dementia	5
Cancer	16

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Greg J. Davis, MD treated as a pulmonologist in Brainerd, MN during 2015 were pulmonary testing, hospital care and inpatient care.

Volume of procedures performed by Dr. Greg J. Davis, MD for Medicare patients.

doctor visit	507
hospital care	175
inpatient care	175
pulmonary testing	307

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Greg J. Davis, MD.

**Gender**
Male	398
Female	408

**Age**
From 65 to 74	258
From 75 to 84	262
85 and over	116
Less than 65	170

Conditions of Medicare patients treated by Dr. Greg J. Davis, MD in 2015

Hypertension	68
High Cholesterol	51
Stroke	5
Ischemic Heart Disease	42
Depression	33
Chronic Kidney Disease	35
Asthma	37
Osteoperosis	11
Atrial Fibrilation	18
Heart Failure	30
Chronic Obstructive Pulmonary Disease	59
Diabetes	32
Dementia	6
Cancer	14

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Greg J. Davis, MD treated as a pulmonologist in Brainerd, MN during 2016 were pulmonary testing, hospital care and inpatient care.

Volume of procedures performed by Dr. Greg J. Davis, MD for Medicare patients.

doctor visit	471
hospital care	165
inpatient care	165
pulmonary testing	177

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Greg J. Davis, MD.

**Gender**
Male	160
Female	214

**Ethnicity**
Non-Hispanic White	357
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	118
From 75 to 84	127
85 and over	51
Less than 65	78

Conditions of Medicare patients treated by Dr. Greg J. Davis, MD in 2016

Hypertension	71
High Cholesterol	48
Stroke	5
Ischemic Heart Disease	39
Depression	28
Chronic Kidney Disease	39
Asthma	58
Osteoperosis	12
Atrial Fibrilation	17
Heart Failure	32
Chronic Obstructive Pulmonary Disease	56
Diabetes	31
Dementia	10
Cancer	14

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Greg J. Davis, MD treated as a pulmonologist in Brainerd, MN during 2017 were pulmonary testing, hospital care and inpatient care.

Volume of procedures performed by Dr. Greg J. Davis, MD for Medicare patients.

doctor visit	459
hospital care	136
inpatient care	136
pulmonary testing	304

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Greg J. Davis, MD.

**Gender**
Male	171
Female	204

**Ethnicity**
Non-Hispanic White	358
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	121
From 75 to 84	113
85 and over	58
Less than 65	83

Conditions of Medicare patients treated by Dr. Greg J. Davis, MD in 2017

Hypertension	71
High Cholesterol	52
Stroke	5
Ischemic Heart Disease	44
Depression	34
Chronic Kidney Disease	37
Asthma	21
Osteoperosis	13
Atrial Fibrilation	21
Heart Failure	36
Chronic Obstructive Pulmonary Disease	56
Diabetes	30
Dementia	10
Cancer	17

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Greg J. Davis, MD treated as a pulmonologist in Brainerd, MN during 2018 were pulmonary testing, hospital care and inpatient care.

Volume of procedures performed by Dr. Greg J. Davis, MD for Medicare patients.

doctor visit	430
hospital care	102
inpatient care	102
pulmonary testing	364

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Greg J. Davis, MD.

**Gender**
Male	183
Female	203

**Ethnicity**
Non-Hispanic White	373
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	124
From 75 to 84	135
85 and over	50
Less than 65	77

Conditions of Medicare patients treated by Dr. Greg J. Davis, MD in 2018

Hypertension	70
High Cholesterol	51
Stroke	5
Ischemic Heart Disease	42
Depression	33
Chronic Kidney Disease	41
Asthma	14
Osteoperosis	13
Atrial Fibrilation	17
Heart Failure	31
Chronic Obstructive Pulmonary Disease	55
Diabetes	31
Dementia	11
Cancer	16

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Greg J. Davis, MD treated as a pulmonologist in Brainerd, MN during 2019 were pulmonary testing, hospital care and inpatient care.

Volume of procedures performed by Dr. Greg J. Davis, MD for Medicare patients.

doctor visit	691
hospital care	148
inpatient care	148
pulmonary testing	533

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Greg J. Davis, MD.

**Gender**
Male	284
Female	344

**Ethnicity**
Non-Hispanic White	607
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	238
From 75 to 84	219
85 and over	77
Less than 65	94

Conditions of Medicare patients treated by Dr. Greg J. Davis, MD in 2019

Hypertension	68
High Cholesterol	55
Stroke	5
Ischemic Heart Disease	44
Depression	31
Chronic Kidney Disease	38
Asthma	13
Osteoperosis	10
Atrial Fibrilation	17
Heart Failure	32
Chronic Obstructive Pulmonary Disease	54
Diabetes	29
Dementia	10
Cancer	20

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Greg J. Davis, MD treated as a pulmonologist in Brainerd, MN during 2020 were pulmonary testing, hospital care and inpatient care.

Volume of procedures performed by Dr. Greg J. Davis, MD for Medicare patients.

doctor visit	183
hospital care	113
inpatient care	113
pulmonary testing	341

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Greg J. Davis, MD.

**Gender**
Male	214
Female	232

**Age**
From 65 to 74	165
From 75 to 84	157
85 and over	59
Less than 65	65

Conditions of Medicare patients treated by Dr. Greg J. Davis, MD in 2020

Hypertension	67
High Cholesterol	50
Stroke	3
Ischemic Heart Disease	50
Depression	30
Chronic Kidney Disease	41
Asthma	12
Osteoperosis	10
Atrial Fibrilation	17
Heart Failure	32
Chronic Obstructive Pulmonary Disease	52
Diabetes	30
Dementia	10
Cancer	16

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Greg J. Davis, MD treated as a pulmonologist in Brainerd, MN during 2021 were pulmonary testing, hospital care and inpatient care.

Volume of procedures performed by Dr. Greg J. Davis, MD for Medicare patients.

doctor visit	174
hospital care	55
inpatient care	55
pulmonary testing	295

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Greg J. Davis, MD.

**Gender**
Male	142
Female	187

**Age**
From 65 to 74	120
From 75 to 84	113
85 and over	44
Less than 65	52

Conditions of Medicare patients treated by Dr. Greg J. Davis, MD in 2021

Hypertension	70
High Cholesterol	57
Stroke	4
Ischemic Heart Disease	52
Depression	30
Chronic Kidney Disease	42
Asthma	12
Osteoperosis	12
Atrial Fibrilation	17
Heart Failure	35
Chronic Obstructive Pulmonary Disease	52
Diabetes	31
Dementia	8
Cancer	15

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Greg J. Davis, MD treated as a pulmonologist in Brainerd, MN during 2022 were pulmonary testing, hospital care and inpatient care.

Volume of procedures performed by Dr. Greg J. Davis, MD for Medicare patients.

doctor visit	306
hospital care	35
inpatient care	35
pulmonary testing	433

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Greg J. Davis, MD.

**Gender**
Male	171
Female	223

**Age**
From 65 to 74	149
From 75 to 84	125
85 and over	52
Less than 65	68

Conditions of Medicare patients treated by Dr. Greg J. Davis, MD in 2022

Hypertension	72
High Cholesterol	66
Stroke	4
Ischemic Heart Disease	32
Depression	26
Chronic Kidney Disease	23
Asthma	17
Osteoperosis	16
Atrial Fibrilation	23
Heart Failure	27
Chronic Obstructive Pulmonary Disease	53
Diabetes	26
Dementia	5
Cancer	20

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2012 - 2022

Volume of procedures performed by Dr. Greg J. Davis, MD for Medicare patients.

The highest averages for the top procedures that Dr. Greg J. Davis, MD treated as a pulmonologist in Brainerd, MN were pulmonary testing, hospital care, inpatient care and bronchoscopy.

bronchoscopy	11
diagnostic procedures	11
doctor visit	462
hospital care	138
inpatient care	138
minimally invasive procedures	11
pulmonary testing	340

Average Medicare Patient Data From 2012 - 2022

Information about Medicare patients treated by Dr. Greg J. Davis, MD.

**Gender**
Male	192
Female	221

**Ethnicity**
Black / African American	0
Asian / Pacific Islander	0
Non-Hispanic White	154
Hispanic	0
Native American / Alaskan Native	0
Other	0

**Age**
75 to 84	140
85 and over	58
Less than 65	77
65 to 74	138

Average of Total of Conditions of Medicare patients treated by Dr. Greg J. Davis, MD From 2012 - 2022

The highest averages of the most common conditions of Medicare patients that Dr. Greg J. Davis, MD treated were hypertension, chronic obstructive pulmonary disease, high cholesterol and ischemic heart disease.

Hypertension	63
High Cholesterol	48
Stroke	3
Ischemic Heart Disease	39
Depression	27
Chronic Kidney Disease	32
Asthma	19
Osteoporosis	10
Heart Failure	28
Chronic Obstructive Pulmonary Disease	50
Diabetes	27
Atrial Fibrillation	17
Cancer	15
Dementia	7

Education & Training

Dr. Greg J. Davis, MD graduated from University of Iowa, Carver College of Medicine. He completed residency at University of Iowa Hospitals & Clinics. He is certified by the American Board of Internal Medicine - Internal Medicine - Pulmonary Disease American Board of Internal Medicine - Internal Medicine - Critical Care Medicine and has a state license in Iowa.

Medical School: University of Iowa, Carver College of Medicine

Residency: University of Iowa Hospitals & Clinics

Board Certification: American Board of Internal Medicine - Internal Medicine - Pulmonary Disease American Board of Internal Medicine - Internal Medicine - Critical Care Medicine

Licensed In: Iowa

Affiliations & Hospitals

Dr. Greg J. Davis, MD is associated with these hospitals and organizations:

Essentia Health

Ratings & Reviews

Dr. Greg J. Davis, MD has an exceptional overall rating with an average of 4.9 out of 5 stars based on 216 ratings. We collect ratings and reviews of Dr. Greg J. Davis, MD from all over the web to help you find the right in Brainerd, MN.

4.9

Overall Rating

(216 Ratings)

Leave a Review

Reviews From Around The Web

Overall Rating: 5.0 2025-03-28

Patient verified via Press Ganey

I didn't see the DR or Nurse wash their hands. But that doesn't mean they didn't before they walked into the room.

Overall Rating: 5.0 2025-09-24

Patient verified via Press Ganey

Dr Davis is a very caring person & always makes me feel comfortable. I am happy to have him as my doctor

Overall Rating: 5.0 2024-03-25

Patient verified via Press Ganey

Doctor asked lots of questions as well as providing answers to my questions

Overall Rating: 5.0 2025-11-10

Patient verified via Press Ganey

I think he is the best doctor you have. He is so good to all around

Overall Rating: 5.0 2024-10-14

Patient verified via Press Ganey

Dr. Davis is A-1 in my book.

Overall Rating: 5.0 2025-07-19

Patient verified via Press Ganey

Good

General Payments

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

**Payments by Company**
Medtronic, Inc.	$464 ILLUMISITE $464
Covidien LP	$338 Interventional Lung Solutions $338
Bayer HealthCare Pharmaceuticals Inc.	$34 Adempas $34
TherapeuticsMD, Inc.	$19 IMVEXXY $19
CSL Behring	$17 Zemaira $17

**Types of Payments**
Travel and Lodging	$477
Food and Beverage	$379
Education	$17

Biography

Dr. Greg Davis' areas of specialization are critical care (intensive care medicine) and adult pulmonology; he sees patients in Brainerd, MN. Patient reviews placed Dr. Davis at an average of 5.0 stars (out of 5). Clinical interests for Dr. Davis include airway obstruction, pneumothorax, and swollen lymph nodes (lymphadenopathy). His professional affiliations include St. Joseph's Hospital and Essentia Health. Dr. Davis welcomes new patients at his office inBrainerd, MN as reported by Doctor.com. He is a graduate of the University of Iowa, Carver College of Medicine and Baylor College of Medicine and a graduate of the University of Iowa Hospitals & Clinics' residency program.