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Home > NC Providers > Pediatric Gastroenterologists

Dr. Nancy M. McGreal, MD

Accepting New Patients

(81 Ratings)

Specializes in: Adult Gastroenterology and Pediatric Gastroenterology

University of Maryland School of Medicine (2000)

Professional interests include: gastrointestinal problems (digestive disorders), immune disorders, inflammatory bowel disease, and more.

2301 Erwin Road
Durham, NC 27710

(919) 684-2410

Dr. Nancy M. McGreal, MD is a gastroenterologist in Raleigh, NC specializing in adult gastroenterology and pediatric gastroenterology. She graduated from University of Maryland School of Medicine in 2000 and has 24 years of experience. Dr. Nancy M. McGreal, MD is affiliated with Duke Health, DUKE HEALTH INTEGRATED PRACTICE INC and PRIVATE DIAGNOSTIC CLINIC PLLC.

Office Locations

Address:

10207 Cerny Street
Raleigh, NC 27617

Address:

200 Trent Drive Dumc 3913
Durham, NC 27710

Address:

2301 Erwin Road
Durham, NC 27710

Address:

40 Duke Medicine Circle
Durham, NC 27710

Some issues Dr. Nancy M. McGreal, MD can help you with:

Colonoscopy

Colonoscopy is the use of a special tool called a colonoscope (a thin, flexible tube with a camera on the end) to examine the inside of the colon and rectum. The tube is typically inserted anally, and it allows the physician to examine the large intestine from the inside. It may be done at any time to diagnose bowel problems, but routine colonoscopies are advised after the age of 50 to screen for colon cancer.

A colonoscopy may be performed to diagnose:

Intestinal ulcers
Polyps
Bowel cancer
An unidentified source of pain or bleeding in the intestine

Patients may be asked to drink only liquids in the days before a colonoscopy, or they may be given an enema to remove residual fecal matter. Before the exam, patients are given medication to help them relax, and then lay on their side on a table. The scope is inserted into the anus and gently moved all the way through the large intestine. Air may be pumped into the intestine to improve the view for the physician. Any polyps that are found will be removed. Then the colonoscope will be withdrawn. A colonoscopy is not usually painful, but patients may feel some bloating or have some cramps right afterward. If patients have polyps removed, they might experience a small amount of bleeding. Any side effects should go away within a few hours.

Gastrointestinal Problems (Digestive Disorders)

The gastrointestinal system, or GI tract, is the name given to a collection of organs that work together to digest food. These organs fit together in a long tube, running from the mouth to the anus, and include the esophagus, stomach, and intestines, among others. With so many parts working together, complicated by today's busy lifestyles and diets, digestive problems are common. As many as 1 in 3 Americans have a digestive or GI disorder. There are a huge variety of digestive problems, but the most common are IBS, constipation, GERD, hemorrhoids, and ulcers.

IBS, or irritable bowel syndrome, happens when the muscles surrounding the colon contract too easily or frequently. The result is abdominal pain, cramps, diarrhea or constipation, gas and bloating. IBS attacks can often be brought on by specific triggers, so a key part of treatment is learning which foods trigger IBS attacks and avoiding them. Treatment also includes exercise, avoiding stress, and medications if needed.

Constipation, or large, hard, or infrequent stools, happens to everyone at some point. It can be caused by a disruption in routine or food, or by eating a diet without many fresh fruits and vegetables. Although it is uncomfortable, constipation is common and usually not serious, but it can sometimes become chronic. Adding fiber to the diet, exercising, and taking medications may help.

GERD, or gastroesophageal reflux disease, is a severe form of chronic heartburn where stomach acid spills back up into the esophagus. Left untreated, the acid may even eat away at the esophagus and cause serious damage. Treatment includes changing the diet to avoid trigger foods, losing weight if needed, medications, or even surgery.

Hemorrhoids are blood vessels around the rectum that become irritated, swollen or torn while straining during a bowel movement. They are most often caused by constipation, but can also be caused by pregnancy, diarrhea, or simply a genetic predisposition towards hemorrhoids. Treatment involves first treating any constipation issues, then keeping the area clean and soothed until it has healed. If these measures are ineffective, surgery is sometimes used.

Peptic ulcers are sores or spots of inflammation in the lining of the stomach or close to the stomach in the small intestine. Usually this area is coated with a protective lining that shields the tissue from the strong stomach acid, but a break in the lining can let acid in, causing the sores. It used to be thought that stress caused ulcers, but now it is known that is not the case. Most often, they are caused by an infection by H. pylori bacteria, but ulcers can also be caused by alcohol abuse or overuse of aspirin, ibuprofen, naproxen, or other NSAIDS. The symptoms of an ulcer are pain, hunger, nausea, and fatigue.

Gastrointestinal problems, perhaps more than any other area, are markedly affected by lifestyle. Many disorders can be prevented or treated at least in part by eating a healthy diet high in fiber, exercising regularly, drinking enough water, and limiting alcohol intake. Still, the frequency of digestive disorders means that even the healthiest person can be affected by them. Anyone who notices blood in their stool, experiences abdominal pain, unexplained weight loss, or any significant change in bowel movements should see a doctor.

In The News

“It's true that gum is indigestible for humans because of its ingredients, according to Duke Health gastroenterologist Dr. Nancy McGreal.”—"7 Things You Learned As A Kid That Are Pretty Much Bogus", Huff Post, July 2018

“According to another Duke gastroenterologist, Nancy McGreal, MD, gum moves through your digestive tract just like any other food or drink, and only takes 30-120 minutes to digest.”—"9 Lies You Learned In Kindergarten And Probably Still Believe Today", Huff Post, July 2014

diagnostic procedures	49
doctor visit	15
gastrointestinal procedures	61
hospital care	14
inpatient care	14
minimally invasive procedures	60
removal of lesion (e.g. growth)	49

**Gender**
Male	49
Female	67

**Ethnicity**
Non-Hispanic White	79
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	61
From 75 to 84	0
85 and over	0
Less than 65	28

Hypertension	72
High Cholesterol	52
Stroke	0
Ischemic Heart Disease	37
Depression	34
Chronic Kidney Disease	41
Asthma	0
Osteoperosis	10
Atrial Fibrilation	21
Heart Failure	26
Chronic Obstructive Pulmonary Disease	18
Diabetes	41
Dementia	0
Cancer	0

diagnostic procedures	88
doctor visit	23
gastrointestinal procedures	107
minimally invasive procedures	106
preventive care	20
removal of lesion (e.g. growth)	88

**Gender**
Male	56
Female	89

**Ethnicity**
Non-Hispanic White	83
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	68
From 75 to 84	0
85 and over	0
Less than 65	43

Hypertension	74
High Cholesterol	44
Stroke	0
Ischemic Heart Disease	33
Depression	34
Chronic Kidney Disease	31
Asthma	0
Osteoperosis	0
Atrial Fibrilation	10
Heart Failure	17
Chronic Obstructive Pulmonary Disease	15
Diabetes	34
Dementia	0
Cancer	19

diagnostic procedures	87
doctor visit	38
gastrointestinal procedures	103
hospital care	12
inpatient care	12
minimally invasive procedures	102
preventive care	17
removal of lesion (e.g. growth)	87

**Gender**
Male	140
Female	146

**Ethnicity**
Non-Hispanic White	196
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	152
From 75 to 84	0
85 and over	0
Less than 65	90

Hypertension	67
High Cholesterol	45
Stroke	0
Ischemic Heart Disease	28
Depression	29
Chronic Kidney Disease	30
Asthma	17
Osteoperosis	0
Atrial Fibrilation	0
Heart Failure	17
Chronic Obstructive Pulmonary Disease	16
Diabetes	38
Dementia	0
Cancer	12

diagnostic procedures	100
doctor visit	32
gastrointestinal procedures	112
hospital care	16
inpatient care	16
minimally invasive procedures	111
removal of lesion (e.g. growth)	100

**Gender**
Male	84
Female	97

**Ethnicity**
Non-Hispanic White	123
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	86
From 75 to 84	0
85 and over	0
Less than 65	55

Hypertension	69
High Cholesterol	53
Stroke	6
Ischemic Heart Disease	36
Depression	35
Chronic Kidney Disease	41
Asthma	25
Osteoperosis	8
Atrial Fibrilation	12
Heart Failure	22
Chronic Obstructive Pulmonary Disease	22
Diabetes	34
Dementia	9
Cancer	17

diagnostic procedures	99
doctor visit	37
gastrointestinal procedures	96
hospital care	12
inpatient care	12
minimally invasive procedures	95
removal of lesion (e.g. growth)	99

**Gender**
Male	80
Female	93

**Ethnicity**
Non-Hispanic White	110
Black	51
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	77
From 75 to 84	0
85 and over	0
Less than 65	51

Hypertension	71
High Cholesterol	52
Stroke	0
Ischemic Heart Disease	40
Depression	40
Chronic Kidney Disease	45
Asthma	11
Osteoperosis	12
Atrial Fibrilation	13
Heart Failure	24
Chronic Obstructive Pulmonary Disease	24
Diabetes	39
Dementia	11
Cancer	17

diagnostic procedures	76
doctor visit	37
gastrointestinal procedures	73
hospital care	30
inpatient care	30
minimally invasive procedures	72
removal of lesion (e.g. growth)	76

**Gender**
Male	71
Female	87

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

**Age**
From 65 to 74	73
From 75 to 84	28
85 and over	12
Less than 65	45

Hypertension	74
High Cholesterol	56
Stroke	0
Ischemic Heart Disease	45
Depression	33
Chronic Kidney Disease	46
Asthma	11
Osteoperosis	10
Atrial Fibrilation	13
Heart Failure	29
Chronic Obstructive Pulmonary Disease	22
Diabetes	45
Dementia	11
Cancer	17

diagnostic procedures	44
doctor visit	44
gastrointestinal procedures	41
minimally invasive procedures	40
removal of lesion (e.g. growth)	44

**Gender**
Male	44
Female	78

**Ethnicity**
Non-Hispanic White	78
Black	0
Hispanic	0
Asian	0
Other	0
Native American	0

**Age**
From 65 to 74	64
From 75 to 84	25
85 and over	0
Less than 65	0

Hypertension	70
High Cholesterol	47
Stroke	0
Ischemic Heart Disease	27
Depression	29
Chronic Kidney Disease	38
Asthma	9
Osteoperosis	14
Atrial Fibrilation	9
Heart Failure	24
Chronic Obstructive Pulmonary Disease	19
Diabetes	34
Dementia	15
Cancer	14

diagnostic procedures	80
doctor visit	27
gastrointestinal procedures	77
hospital care	36
inpatient care	36
minimally invasive procedures	76
removal of lesion (e.g. growth)	80

**Gender**
Male	66
Female	76

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

**Age**
From 65 to 74	66
From 75 to 84	34
85 and over	0
Less than 65	0

Hypertension	75
High Cholesterol	52
Stroke	0
Ischemic Heart Disease	32
Depression	37
Chronic Kidney Disease	49
Asthma	9
Osteoperosis	11
Atrial Fibrilation	14
Heart Failure	27
Chronic Obstructive Pulmonary Disease	18
Diabetes	37
Dementia	15
Cancer	12

diagnostic procedures	213
doctor visit	56
gastrointestinal procedures	234
hospital care	28
inpatient care	28
minimally invasive procedures	245
preventive care	22
removal of lesion (e.g. growth)	213

Average Medicare Procedure Volume From 2013 - 2021

Volume of procedures performed by Dr. Nancy M. McGreal, MD for Medicare patients.

The highest averages for the top procedures that Dr. Nancy M. McGreal, MD treated as a gastroenterologist in Raleigh, NC were minimally invasive procedures, gastrointestinal procedures, removal of lesion (e.g. growth) and diagnostic procedures.

diagnostic procedures	93
doctor visit	34
gastrointestinal procedures	102
hospital care	21
inpatient care	21
minimally invasive procedures	104
preventive care	20
removal of lesion (e.g. growth)	93

Average Medicare Patient Data From 2013 - 2021

Information about Medicare patients treated by Dr. Nancy M. McGreal, MD.

**Gender**
Male	59
Female	73

**Ethnicity**
Black / African American	5
Asian / Pacific Islander	0
Non-Hispanic White	86
Native American / Alaskan Native	0
Hispanic	0
Other	0

**Age**
75 to 84	8
85 and over	1
Less than 65	31
65 to 74	64

Average of Total of Conditions of Medicare patients treated by Dr. Nancy M. McGreal, MD From 2013 - 2021

The highest averages of the most common conditions of Medicare patients that Dr. Nancy M. McGreal, MD treated were hypertension, high cholesterol, chronic kidney disease and diabetes.

Hypertension	57
High Cholesterol	40
Stroke	0
Ischemic Heart Disease	27
Depression	27
Chronic Kidney Disease	32
Asthma	8
Osteoporosis	6
Heart Failure	18
Chronic Obstructive Pulmonary Disease	15
Diabetes	30
Atrial Fibrillation	9
Cancer	10
Dementia	6

Education & Training

Dr. Nancy M. McGreal, MD graduated from University of Maryland School of Medicine in 2000. She completed residency at University of California, San Diego (UCSD) Affiliated Hospitals. She has a state license in North Carolina.

Medical School: University of Maryland School of Medicine (2000)

Residency: University of California, San Diego (UCSD) Affiliated Hospitals (2004)

Licensed In: North Carolina

Affiliations & Hospitals

Dr. Nancy M. McGreal, MD is associated with these hospitals and organizations:

Duke Health

DUKE HEALTH INTEGRATED PRACTICE INC

PRIVATE DIAGNOSTIC CLINIC PLLC

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. Nancy M. McGreal, MD appears to accept the following insurance providers: MedCost, Aetna Traditional Choice, Blue Advantage, Aetna Medicare PPO, BlueCross BlueShield of North Carolina, CIGNA Open Access Plus, WellCare, AmeriHealth, Medicare Part B, Medicare Advantage, AARP, CIGNA Open Access, United Healthcare PPO, Aetna, Aetna Workers' Compensation, TRICARE Prime, United Healthcare, TRICARE Prime Remote, Aetna Open Choice PPO, Medicare, Medicaid, Humana, Cigna, TRICARE, Harvard Pilgrim Health Care, Aetna Managed Choice POS, Aetna HMO, Gateway Health Alliance, Duke Group Plans, *Duke HomeCare and Hospice does not participate in the plan., Blue Options (123, PPO, HSA), *Duke HomeCare and Hospice and mental health providers do not participate with the plan., Duke Basic, Ambetter, Experience Health, Blue Select, Blue Medicare (HMO, PPO)*, Healthy Blue, All Savers Fully Insured, First Medicare Direct, Carolina Complete Health, Healthgram, All Savers Alternate Funding, Duke Select, NC State Employees Health Plan, Ambetter of North Carolina and United Medical Resources (UMR).

Insurance Accepted by Provider includes:

According to our sources, Dr. Nancy M. McGreal, MD accepts the following insurance providers:

MedCost

Aetna Traditional Choice

Blue Advantage

Aetna Medicare PPO

BlueCross BlueShield of North Carolina

CIGNA Open Access Plus

WellCare

AmeriHealth

Medicare Part B

Medicare Advantage

AARP

CIGNA Open Access

United Healthcare PPO

Aetna

Aetna Workers' Compensation

TRICARE Prime

United Healthcare

TRICARE Prime Remote

Aetna Open Choice PPO

Medicare

Medicaid

Humana

Cigna

TRICARE

Harvard Pilgrim Health Care

Aetna Managed Choice POS

Aetna HMO

Gateway Health Alliance

Duke Group Plans

*Duke HomeCare and Hospice does not participate in the plan.

Blue Options (123, PPO, HSA)

*Duke HomeCare and Hospice and mental health providers do not participate with the plan.

Duke Basic

Ambetter

Experience Health

Blue Select

Blue Medicare (HMO, PPO)*

Healthy Blue

All Savers Fully Insured

First Medicare Direct

Carolina Complete Health

Healthgram

All Savers Alternate Funding

Duke Select

NC State Employees Health Plan

Ambetter of North Carolina

United Medical Resources (UMR)

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Ratings & Reviews

Dr. Nancy M. McGreal, MD has an exceptional overall rating with an average of 4.88 out of 5 stars based on 81 ratings. We collect ratings and reviews of Dr. Nancy M. McGreal, MD from all over the web to help you find the right in Raleigh, NC.

4.88

Overall Rating

(81 Ratings)

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General Payments

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

**Payments by Company**
Janssen Research & Development, LLC	$16,424 STELARA $12,372	REMICADE $2,302	$1,750
Biogen, Inc.	$150 TYSABRI $150
Gilead Sciences, Inc.	$125 $125

**Types of Payments**
Consulting Fee	$14,272
Travel and Lodging	$2,107
Food and Beverage	$320

Research Payments

Dr. Nancy M. McGreal, MD has received 68 research payments totaling $278,615.

Biography

Dr. Nancy McGreal is an adult gastroenterology and pediatric gastroenterology specialist in Durham, NC and Raleigh, NC. She is affiliated with Duke Health. She attended medical school at the University of Maryland School of Medicine.