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Dr. Nelson Tan Chao, MD

Accepting New Patients
Specializes in: Adult Pulmonology and Adult Allergy & Immunology
Far Eastern University, Nicanor Reyes Medical Foundation
Professional interests include: angioedema, immunization (preventive vaccines), insect allergy, and more.
4 Corporate Drive Suite 268
Shelton, CT 06484

Dr. Nelson Tan Chao, MD is a pulmonologist in Shelton, CT specializing in adult pulmonology and adult allergy & immunology. He graduated from Far Eastern University, Nicanor Reyes Medical Foundation. Dr. Nelson Tan Chao, MD is affiliated with Yale New Haven Health and REHABILITATION ASSOCIATES INC.

View Doctor's Full Profile (203) 402-0377

Office Locations

Yale New Haven Health

4 Corporate Drive Suite 268
Shelton, CT 06484
(203) 402-0772
open_in_new

Some issues Dr. Nelson Tan Chao, 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. Nelson Tan Chao, MD in 2023

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

Top 5%

By Volume:

fecal occult blood test
preventive care
screening stool guaiac test

In 2023, Dr. Nelson Tan Chao, MD performed more fecal occult blood test (FOBT), preventive care, and screening stool guaiac test (gFOBT) procedures for Medicare patients than 95% of providers in related specialties within Connecticut.

Medicare Procedure and Patient Information

2013 Medicare Procedure Volume

The top procedures that Dr. Nelson Tan Chao, MD treated as a pulmonologist in Shelton, CT during 2013 were skin testing, minimally invasive procedures, allergy testing and hospital care.

Volume of procedures performed by Dr. Nelson Tan Chao, MD for Medicare patients.

allergy testing 623
doctor visit 522
hospital care 104
inpatient care 104
minimally invasive procedures 623
preventive care 67
skin testing 623
vaccines 67

2013 Medicare Patient Data

Information about Medicare patients treated by Dr. Nelson Tan Chao, MD.

Gender
Male 85
Female 128
Ethnicity
Non-Hispanic White 188
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 106
From 75 to 84 72
85 and over 0
Less than 65 0

Conditions of Medicare patients treated by Dr. Nelson Tan Chao, MD in 2013

The most common conditions of Medicare patients that Dr. Nelson Tan Chao, MD treated during 2013 were hypertension, high cholesterol, ischemic heart disease and chronic obstructive pulmonary disease.

Hypertension 61
High Cholesterol 54
Stroke 8
Ischemic Heart Disease 32
Depression 12
Chronic Kidney Disease 17
Asthma 24
Osteoperosis 10
Atrial Fibrilation 8
Heart Failure 19
Chronic Obstructive Pulmonary Disease 26
Diabetes 24
Dementia 5
Cancer 12

Medicare Procedure and Patient Information

2014 Medicare Procedure Volume

The top procedures that Dr. Nelson Tan Chao, MD treated as a pulmonologist in Shelton, CT during 2014 were skin testing, minimally invasive procedures, allergy testing and hospital care.

Volume of procedures performed by Dr. Nelson Tan Chao, MD for Medicare patients.

allergy testing 1002
doctor visit 563
hospital care 180
inpatient care 180
minimally invasive procedures 1002
preventive care 89
skin testing 1002
vaccines 89

2014 Medicare Patient Data

Information about Medicare patients treated by Dr. Nelson Tan Chao, MD.

Gender
Male 90
Female 138
Ethnicity
Non-Hispanic White 195
Black 0
Hispanic 11
Asian 0
Other 0
Native American 0
Age
From 65 to 74 109
From 75 to 84 87
85 and over 0
Less than 65 0

Conditions of Medicare patients treated by Dr. Nelson Tan Chao, MD in 2014

The most common conditions of Medicare patients that Dr. Nelson Tan Chao, MD treated during 2014 were hypertension, high cholesterol, chronic obstructive pulmonary disease and ischemic heart disease.

Hypertension 64
High Cholesterol 59
Stroke 0
Ischemic Heart Disease 29
Depression 12
Chronic Kidney Disease 14
Asthma 23
Osteoperosis 8
Atrial Fibrilation 9
Heart Failure 16
Chronic Obstructive Pulmonary Disease 30
Diabetes 24
Dementia 7
Cancer 10

Medicare Procedure and Patient Information

2015 Medicare Procedure Volume

The top procedures that Dr. Nelson Tan Chao, MD treated as a pulmonologist in Shelton, CT during 2015 were preventive care, vaccines, hospital care and inpatient care.

Volume of procedures performed by Dr. Nelson Tan Chao, MD for Medicare patients.

doctor visit 540
hospital care 109
inpatient care 109
preventive care 110
vaccines 110

2015 Medicare Patient Data

Information about Medicare patients treated by Dr. Nelson Tan Chao, MD.

Gender
Male 186
Female 274
Ethnicity
Non-Hispanic White 392
Black 0
Hispanic 26
Asian 0
Other 0
Native American 0
Age
From 65 to 74 210
From 75 to 84 164
85 and over 60
Less than 65 26

Conditions of Medicare patients treated by Dr. Nelson Tan Chao, MD in 2015

The most common conditions of Medicare patients that Dr. Nelson Tan Chao, MD treated during 2015 were hypertension, high cholesterol, ischemic heart disease and asthma.

Hypertension 65
High Cholesterol 58
Stroke 0
Ischemic Heart Disease 32
Depression 17
Chronic Kidney Disease 20
Asthma 27
Osteoperosis 8
Atrial Fibrilation 8
Heart Failure 17
Chronic Obstructive Pulmonary Disease 27
Diabetes 23
Dementia 7
Cancer 11

Medicare Procedure and Patient Information

2016 Medicare Procedure Volume

The top procedures that Dr. Nelson Tan Chao, MD treated as a pulmonologist in Shelton, CT during 2016 were preventive care and vaccines.

Volume of procedures performed by Dr. Nelson Tan Chao, MD for Medicare patients.

doctor visit 556
preventive care 108
vaccines 108

2016 Medicare Patient Data

Information about Medicare patients treated by Dr. Nelson Tan Chao, MD.

Gender
Male 100
Female 145
Ethnicity
Non-Hispanic White 206
Black 0
Hispanic 12
Asian 0
Other 0
Native American 0
Age
From 65 to 74 122
From 75 to 84 80
85 and over 31
Less than 65 12

Conditions of Medicare patients treated by Dr. Nelson Tan Chao, MD in 2016

The most common conditions of Medicare patients that Dr. Nelson Tan Chao, MD treated during 2016 were hypertension, high cholesterol, asthma and ischemic heart disease.

Hypertension 64
High Cholesterol 54
Stroke 0
Ischemic Heart Disease 23
Depression 9
Chronic Kidney Disease 19
Asthma 35
Osteoperosis 7
Atrial Fibrilation 5
Heart Failure 11
Chronic Obstructive Pulmonary Disease 22
Diabetes 22
Dementia 8
Cancer 11

Medicare Procedure and Patient Information

2017 Medicare Procedure Volume

The top procedures that Dr. Nelson Tan Chao, MD treated as a pulmonologist in Shelton, CT during 2017 were skin testing, minimally invasive procedures, allergy testing and preventive care.

Volume of procedures performed by Dr. Nelson Tan Chao, MD for Medicare patients.

allergy testing 941
doctor visit 616
minimally invasive procedures 941
preventive care 70
skin testing 941
vaccines 70

2017 Medicare Patient Data

Information about Medicare patients treated by Dr. Nelson Tan Chao, MD.

Gender
Male 112
Female 150
Ethnicity
Non-Hispanic White 222
Black 0
Hispanic 14
Asian 0
Other 0
Native American 0
Age
From 65 to 74 112
From 75 to 84 101
85 and over 36
Less than 65 13

Conditions of Medicare patients treated by Dr. Nelson Tan Chao, MD in 2017

The most common conditions of Medicare patients that Dr. Nelson Tan Chao, MD treated during 2017 were hypertension, high cholesterol, ischemic heart disease and chronic obstructive pulmonary disease.

Hypertension 63
High Cholesterol 39
Stroke 0
Ischemic Heart Disease 26
Depression 17
Chronic Kidney Disease 22
Asthma 21
Osteoperosis 11
Atrial Fibrilation 8
Heart Failure 12
Chronic Obstructive Pulmonary Disease 24
Diabetes 21
Dementia 8
Cancer 13

Medicare Procedure and Patient Information

2018 Medicare Procedure Volume

The top procedures that Dr. Nelson Tan Chao, MD treated as a pulmonologist in Shelton, CT during 2018 were preventive care, vaccines and lab tests.

Volume of procedures performed by Dr. Nelson Tan Chao, MD for Medicare patients.

doctor visit 567
lab tests 65
preventive care 190
vaccines 125

2018 Medicare Patient Data

Information about Medicare patients treated by Dr. Nelson Tan Chao, MD.

Gender
Male 102
Female 139
Ethnicity
Non-Hispanic White 209
Black 0
Hispanic 0
Asian 0
Other 0
Native American 0
Age
From 65 to 74 102
From 75 to 84 87
85 and over 37
Less than 65 15

Conditions of Medicare patients treated by Dr. Nelson Tan Chao, MD in 2018

The most common conditions of Medicare patients that Dr. Nelson Tan Chao, MD treated during 2018 were high cholesterol, hypertension, ischemic heart disease and chronic kidney disease.

Hypertension 58
High Cholesterol 63
Stroke 0
Ischemic Heart Disease 26
Depression 12
Chronic Kidney Disease 23
Asthma 20
Osteoperosis 9
Atrial Fibrilation 10
Heart Failure 12
Chronic Obstructive Pulmonary Disease 21
Diabetes 19
Dementia 8
Cancer 10

Medicare Procedure and Patient Information

2019 Medicare Procedure Volume

The top procedures that Dr. Nelson Tan Chao, MD treated as a pulmonologist in Shelton, CT during 2019 were preventive care, vaccines and lab tests.

Volume of procedures performed by Dr. Nelson Tan Chao, MD for Medicare patients.

doctor visit 535
lab tests 60
preventive care 129
vaccines 83

2019 Medicare Patient Data

Information about Medicare patients treated by Dr. Nelson Tan Chao, MD.

Gender
Male 103
Female 143
Ethnicity
Non-Hispanic White 210
Black 0
Hispanic 13
Asian 0
Other 0
Native American 0
Age
From 65 to 74 124
From 75 to 84 75
85 and over 30
Less than 65 17

Conditions of Medicare patients treated by Dr. Nelson Tan Chao, MD in 2019

The most common conditions of Medicare patients that Dr. Nelson Tan Chao, MD treated during 2019 were high cholesterol, hypertension, ischemic heart disease and diabetes.

Hypertension 62
High Cholesterol 69
Stroke 0
Ischemic Heart Disease 26
Depression 12
Chronic Kidney Disease 22
Asthma 17
Osteoperosis 9
Atrial Fibrilation 9
Heart Failure 12
Chronic Obstructive Pulmonary Disease 21
Diabetes 24
Dementia 9
Cancer 11

Medicare Procedure and Patient Information

2020 Medicare Procedure Volume

The top procedures that Dr. Nelson Tan Chao, MD treated as a pulmonologist in Shelton, CT during 2020 were preventive care, lab tests and vaccines.

Volume of procedures performed by Dr. Nelson Tan Chao, MD for Medicare patients.

doctor visit 321
lab tests 54
preventive care 74
vaccines 20

2020 Medicare Patient Data

Information about Medicare patients treated by Dr. Nelson Tan Chao, MD.

Gender
Male 92
Female 118
Ethnicity
Non-Hispanic White 187
Black 0
Hispanic 12
Asian 0
Other 0
Native American 0
Age
From 65 to 74 100
From 75 to 84 73
85 and over 0
Less than 65 0

Conditions of Medicare patients treated by Dr. Nelson Tan Chao, MD in 2020

The most common conditions of Medicare patients that Dr. Nelson Tan Chao, MD treated during 2020 were high cholesterol, hypertension, ischemic heart disease and diabetes.

Hypertension 48
High Cholesterol 56
Stroke 0
Ischemic Heart Disease 25
Depression 13
Chronic Kidney Disease 18
Asthma 16
Osteoperosis 10
Atrial Fibrilation 8
Heart Failure 14
Chronic Obstructive Pulmonary Disease 15
Diabetes 19
Dementia 6
Cancer 10

Medicare Procedure and Patient Information

2021 Medicare Procedure Volume

The top procedures that Dr. Nelson Tan Chao, MD treated as a pulmonologist in Shelton, CT during 2021 were skin testing, minimally invasive procedures, allergy testing and lab tests.

Volume of procedures performed by Dr. Nelson Tan Chao, MD for Medicare patients.

allergy testing 642
doctor visit 372
lab tests 63
minimally invasive procedures 642
preventive care 63
skin testing 642

2021 Medicare Patient Data

Information about Medicare patients treated by Dr. Nelson Tan Chao, MD.

Gender
Male 97
Female 126
Ethnicity
Non-Hispanic White 192
Black 0
Hispanic 0
Asian 11
Other 0
Native American 0
Age
From 65 to 74 104
From 75 to 84 76
85 and over 0
Less than 65 0

Conditions of Medicare patients treated by Dr. Nelson Tan Chao, MD in 2021

The most common conditions of Medicare patients that Dr. Nelson Tan Chao, MD treated during 2021 were high cholesterol, hypertension, ischemic heart disease and chronic kidney disease.

Hypertension 53
High Cholesterol 63
Stroke 0
Ischemic Heart Disease 23
Depression 9
Chronic Kidney Disease 20
Asthma 16
Osteoperosis 9
Atrial Fibrilation 8
Heart Failure 9
Chronic Obstructive Pulmonary Disease 18
Diabetes 14
Dementia 8
Cancer 13

Medicare Procedure and Patient Information

2022 Medicare Procedure Volume

The top procedures that Dr. Nelson Tan Chao, MD treated as a pulmonologist in Shelton, CT during 2022 were lab tests and preventive care.

Volume of procedures performed by Dr. Nelson Tan Chao, MD for Medicare patients.

doctor visit 391
lab tests 53
preventive care 53

2022 Medicare Patient Data

Information about Medicare patients treated by Dr. Nelson Tan Chao, MD.

Gender
Male 87
Female 107
Ethnicity
Non-Hispanic White 164
Black 0
Hispanic 0
Asian 11
Other 0
Native American 0
Age
From 65 to 74 84
From 75 to 84 77
85 and over 0
Less than 65 0

Conditions of Medicare patients treated by Dr. Nelson Tan Chao, MD in 2022

The most common conditions of Medicare patients that Dr. Nelson Tan Chao, MD treated during 2022 were high cholesterol, hypertension, asthma and chronic obstructive pulmonary disease.

Hypertension 71
High Cholesterol 75
Stroke 6
Ischemic Heart Disease 21
Depression 11
Chronic Kidney Disease 20
Asthma 24
Osteoperosis 14
Atrial Fibrilation 12
Heart Failure 8
Chronic Obstructive Pulmonary Disease 21
Diabetes 15
Dementia 6
Cancer 19

Medicare Procedure and Patient Information

2023 Medicare Procedure Volume

The top procedures that Dr. Nelson Tan Chao, MD treated as a pulmonologist in Shelton, CT during 2023 were lab tests and preventive care.

Volume of procedures performed by Dr. Nelson Tan Chao, MD for Medicare patients.

doctor visit 364
lab tests 66
preventive care 66

2023 Medicare Patient Data

Information about Medicare patients treated by Dr. Nelson Tan Chao, MD.

Gender
Male 87
Female 107
Ethnicity
Non-Hispanic White 152
Black 0
Hispanic 0
Asian 0
Other 19
Native American 0
Age
From 65 to 74 85
From 75 to 84 81
85 and over 0
Less than 65 0

Conditions of Medicare patients treated by Dr. Nelson Tan Chao, MD in 2023

The most common conditions of Medicare patients that Dr. Nelson Tan Chao, MD treated during 2023 were high cholesterol, hypertension, chronic obstructive pulmonary disease and ischemic heart disease.

Hypertension 72
High Cholesterol 75
Stroke 0
Ischemic Heart Disease 24
Depression 11
Chronic Kidney Disease 22
Asthma 22
Osteoperosis 11
Atrial Fibrilation 14
Heart Failure 13
Chronic Obstructive Pulmonary Disease 24
Diabetes 15
Dementia 7
Cancer 19

Medicare Procedure and Patient Information

Average Medicare Procedure Volume From 2013 - 2023

Volume of procedures performed by Dr. Nelson Tan Chao, MD for Medicare patients.

The highest averages for the top procedures that Dr. Nelson Tan Chao, MD treated as a pulmonologist in Shelton, CT were skin testing, allergy testing, minimally invasive procedures and hospital care.

allergy testing 802
doctor visit 486
hospital care 131
inpatient care 131
lab tests 60
minimally invasive procedures 802
preventive care 92
skin testing 802
vaccines 84

Average Medicare Patient Data From 2013 - 2023

Information about Medicare patients treated by Dr. Nelson Tan Chao, MD.

Gender
Male 103
Female 143
Ethnicity
Black / African American 0
Asian / Pacific Islander 2
Non-Hispanic White 210
Native American / Alaskan Native 0
Hispanic 8
Other 1
Age
75 to 84 88
85 and over 17
Less than 65 7
65 to 74 114

Average of Total of Conditions of Medicare patients treated by Dr. Nelson Tan Chao, MD From 2013 - 2023

The highest averages of the most common conditions of Medicare patients that Dr. Nelson Tan Chao, MD treated were hypertension, high cholesterol, ischemic heart disease and asthma.

Hypertension 61
High Cholesterol 60
Stroke 1
Ischemic Heart Disease 26
Depression 12
Chronic Kidney Disease 19
Asthma 22
Osteoporosis 9
Heart Failure 13
Chronic Obstructive Pulmonary Disease 22
Diabetes 20
Atrial Fibrillation 9
Cancer 12
Dementia 7

Education & Training

Dr. Nelson Tan Chao, MD graduated from Far Eastern University, Nicanor Reyes Medical Foundation. He completed residency at Cabrini Medical Center. He has a state license in Connecticut.

Medical School: Far Eastern University, Nicanor Reyes Medical Foundation

Residency: Cabrini Medical Center

Licensed In: Connecticut

Affiliations & Hospitals

Dr. Nelson Tan Chao, MD is associated with these hospitals and organizations:

Yale New Haven Health
REHABILITATION ASSOCIATES INC

Ratings & Reviews

Dr. Nelson Tan Chao, MD has a good overall rating with an average of 3.0 out of 5 stars based on 4 ratings. We collect ratings and reviews of Dr. Nelson Tan Chao, MD from all over the web to help you find the right in Shelton, CT. 

3
Overall Rating
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General Payments

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

Payments by Company
Aastrom Biosciences, Inc $1,625
$1,625
CSL Behring $36 Haegarda
$36
Boehringer Ingelheim Pharmaceuticals, Inc. $32 COMBIVENT RESPIMAT
$18 		Spiriva
$14
AstraZeneca Pharmaceuticals LP $29 SYMBICORT
$16 		DALIRESP
$13
GlaxoSmithKline, LLC. $20 NUCALA
$20
Other $17 VIBERZI
$17
Types of Payments
Consulting Fee $1,625
Food and Beverage $84
Education $49

Biography

Dr. Nelson Chao is a general practice, adult allergy & immunology, and adult pulmonology specialist in Shelton, CT. Dr. Chao's areas of expertise include the following: drug allergy, eczema, and primary care. His average patient rating is 3.5 stars (out of 5). He completed his residency training at Cabrini Medical Center. Dr. Chao (or staff) is conversant in Filipino and Chinese. Dr. Chao is professionally affiliated with Yale New Haven Health. He has an open panel in Shelton, CT according to Yale New Haven Health.

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