About me
John E. Carroll, MD, is a Gastroenterologist at MedStar Georgetown University Hospital. Board certified in internal medicine and gastroenterology, Dr. Carroll has been at Georgetown for twenty-seven years. After graduating from medical school in Wisconsin, Dr. Carroll came to Georgetown for his internship in 1993, where he stayed and completed all of his postgraduate and specialty training. Dr. Carroll grew up in Chicago, and earned his degree in biomedical engineering at Marquette University.
Dr. Carroll did advanced training in endoscopic ultrasound (EUS) at Georgetown, and has been specializing in performing EUS procedures of the GI tract for 20 years. In addition to his interest in EUS procedures of the pancreas, stomach and biliary systems, Dr. Carroll also has extensive interest and expertise in treating disorders of the esophagus, such as Barrett’s esophagus and early invasive esophageal cancers. With the increasing advances in endoscopic technology which have developed in recent years, Dr. Carroll and his colleagues are routinely successfully curing early esophageal cancers endoscopically, which up until recently had required large surgeries to cure.
During his spare time Dr. Carroll enjoys skiing, sailing, travel, and following DC sports, in particular the Washington Nationals.
Hear from one of Dr. Carroll's patients:
Preventing Esophageal Cancer: Area Experts Treat Barrett's Esophagus
Clinical areas of focus
- Abdominal Distention
- Abnormal Bowel Movement
- Abnormal Stool
- Anal Fissure
- Bleeding Hemorrhoids
- Chronic Diarrhea
- Colonoscopy
- Constipation
- Diarrhea
- Gastrointestinal Bleeding
- Helicobacter Pylori
- Postprandial Diarrhea
- Rectal Pain
- Stomach Pain
Conditions and procedures
Conditions I treat
- Abdominal Bloating
- Abdominal Distention
- Abdominal Pain
- Abnormal Amylase Blood Test
- Abnormal Bowel Movement
- Abnormal Liver Function Blood Test
- Abnormal Stool
- Achalasia
- Acute Pancreatitis
- Alcoholic Liver Disease
- Allergic Esophagitis
- Altered Bowel Habits
- Anal Cancer
- Anal Fissure
- Anal Fistula
- Anal Itching
- Anal Pain
- Anal Spasm
- Anemia
- Annular Pancreas
- Anorexia
- Appendiceal Cancer
- Autoimmune Enteropathy
- Autoimmune Hepatitis
- Barrett's Esophagus
- Benign Neoplasm Of Colon
- Biliary Tract Disease
- Bleeding Hemorrhoids
- Blood In Stool
- Bowel Dysmotility
- Bright Red Blood Per Rectum
- Celiac Disease
- Choking Sensation
- Cholangitis
- Cholecystitis
- Cholelithiasis
- Cholestasis
- Chronic Abdominal Pain
- Chronic Diarrhea
- Chronic Pancreatitis
- Cirrhosis
- Clostridium Difficile
- Colitis
- Collagenous Colitis
- Colonic Inertia
- Colonic Polyps
- Colorectal Malignancy
- Constipation
- Crohn's Disease
- Cyclic Vomiting Syndrome
- Diarrhea
- Digestive Disorders
- Diverticular Disease
- Diverticulitis
- Drug Induced Liver Injury
- Duodenal Ulcer
- Duodenitis
- Dyspepsia
- Dysphagia
- Early Satiety
- Elevated Alkaline Phosphatase Level
- Elevated Lipase
- Eosinophilic Colitis
- Eosinophilic Enteritis
- Eosinophilic Esophagitis
- Eosinophilic Gastritis
- Epigastric Pain
- Eructation
- Esophageal Cancer
- Esophageal Disease
- Esophageal Diverticulum
- Esophageal Mass
- Esophageal Motility Disorders
- Esophageal Spasm
- Esophageal Stricture
- Esophageal Thickening
- Esophageal Ulcer
- Esophageal Varices
- Esophagitis
- Family History Of Colon Cancer
- Family History Of Colon Polyps
- Fatty Liver
- Fecal Impaction
- Fecal Incontinence
- Flatulence
- Focal Nodular Hyperplasia
- Gallbladder Cancer
- Gallbladder Disease
- Gallbladder Polyp
- Gastric Ulcer
- Gastritis
- Gastroenteritis
- Gastroesophageal Reflux Disease
- Gastrointestinal (GI) Cancer
- Gastrointestinal (GI) Stromal Tumors
- Gastrointestinal Amyloid
- Gastrointestinal Bleeding
- Gastrojejunal Ulcer
- Gastroparesis
- Giardiasis
- Gluten Sensitivity
- Helicobacter Pylori
- Hematemesis
- Hemochromatosis
- Hemorrhoids
- Hepatitis
- Hepatitis B
- Hepatitis C
- Hepatomegaly
- Hiatal Hernia
- Ileitis
- Inflammatory Bowel Disease
- Intestinal Obstruction
- Intractable Vomiting
- Iron Deficiency Anemia
- Irritable Bowel Syndrome
- Ischemic Bowel
- Ischemic Colitis
- Jaundice
- Lactose Intolerance
- Left Upper Quadrant Pain
- Liver Disease
- Liver Mass
- Lymphocytic Colitis
- Lynch Syndrome
- Malabsorption
- Malignant Neoplasm Of Stomach
- Melena
- Microscopic Colitis
- Motility Disorders
- Nausea
- Non Alcoholic Fatty Liver Disease
- Non Alcoholic Steatohepatitis
- Obstipation
- Obstructive Jaundice
- Odynophagia
- Ogilvie Syndrome
- Pancreas Divisum
- Pancreatic Cyst
- Pancreatic Insufficiency
- Pancreatic Pseudocyst
- Pancreaticobiliary Disease
- Pancreatitis
- Peptic Ulcer
- Peritonitis
- Pernicious Anemia
- Personal History Of Colonic Polyps
- Peutz Jeghers Syndrome
- Polyposis Syndrome
- Portal Hypertension
- Portal Hypertensive Gastropathy
- Positive Hemoccult Fecal Occult Blood Test
- Postprandial Diarrhea
- Primary Biliary Cirrhosis
- Proctitis
- Rectal Bleeding
- Rectal Cancer
- Rectal Pain
- Right Lower Quadrant Pain
- Right Upper Quadrant Pain
- Short Bowel Syndrome
- Small Bowel Disease
- Small Intestine Cancer
- Steatorrhea
- Stomach Cancer
- Stomach Cramps
- Stomach Disorders
- Stomach Pain
- Swallowing Problem
- Toxic Liver Injury
- Ulcerative Colitis
- Ulcerative Proctitis
- Vomiting
- Whipple's Disease
- Wilson's Disease
Procedures I perform
- Bravo PH Test
- Colon Polypectomy
- Colonoscopy
- Colorectal Screening
- Esophagogastroduodenoscopy (EGD)
- Feeding Tube Management
- Gastrointestinal (GI) Cancer Screening
- Gastroscopy
- Peg (PERCUTANEOUS ENDOSCOPIC GASTROSTOMY)
- Proctosigmoidoscopy
- Sigmoidoscopy
- Single Balloon Enteroscopy
Insurance
MedStar Health accepts most major health insurance plans. If you are uncertain as to whether your individual health insurance plan is accepted at MedStar Health, please call your insurance company.
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List of insurance plans we accept
- UnitedHealthcare Medicare Adv/Special Needs Plans
- UnitedHealthcare and AARP Medicare Complete Plans/ UHC Group Medicare Advantage Plans HMO, POS, PPO"
- United Healthcare Options (PPO) (includes Empire PPO, GEHA, Compass Rose)"
- UHC Community Plan of MD
- Private Health Care Systems (PHCS) (PPO)
- Medicare Fee for Service
- Kaiser Virginia Premier
- Kaiser PermanenteSelect-Added Choice
- Kaiser Permanente Signature-Added Choice
- Kaiser Permanente Signature
- Kaiser Permanente Select
- Kaiser Permanente Medicare Plus (Medicare Supplemental Plan)
- Kaiser Permanente Flexible Choice POS
- Kaiser MD Medicaid MCO
- Cigna HealthSpring Medicare Advantage
- CFBCBS Federal Employee Program (Std/Basic PPO/Blue Focus)
- CFBCBS EPO
- Blue Choice Advantage & Healthy Blue (HMO, POS)"
- Aetna Better Health of Maryland
- Aetna Managed Choice (POS)
- Opoen HMO Option
- Aetna Elect Choice/ Open Access (POS)
- Choice Fund PPO
- Open POS II
- Aetna Innovations: HMO & EPO Plus
- Innovation Health: Open POS Plus
- Select HMO/HealthFund/Health Network
- Aetna Open Choice (PPO)
- Open EPO Plus
- Cigna EPO
- CFBSBC Blue Preferred PPO
- Innovation Health: Open Network Only Plus
- Aetna HMO-Open Access/Select OA/HealthFund/Health Network Option OA
- Open HMO
- Innovation Health: Indemnity
- PPO and PPO Plus
- Aetna Managed Choice Open Access (POS)
- HealthyBlue PPO
- Choice POS & Choice POS II
- BlueChoice Open Access
- CFBCBS Blue Choice Opt Out Open Access
- Aetna HMO
- Network OA
- Innovation Health: POS Plus
- Innovation Health: POS
- CIGNA HMO Open Access (OA)
- POS OA & OA Plus
- Innovation Health: PPO
- Aetna Traditional Choice (PPO)
- United Healthcare Choice
- Coventry Health Care National Network PPO
- Aetna Worker's Compensation Network
- Mamsi Life & Health (Indem./PPO)
- Optimum Choice Preferred (POS) & OCI Direct (HMO)
- M.D. IPA Preferred (POS)
- M.D. IPA (HMO)
- United Student Resources
- United Healthcare Choice Plus
- United Healthcare Select Plus (POS)
- United Healthcare Select HMO - EPO/NPP
- MedStar Select (MedStar Associates' Plan)
- MedStar Family Choice - Maryland Health Choice
- Tricare for Life (Medicare Supplemental Plan)
- Tricare Prime
- FIRST HEALTH
- First Health PPO
- Coventry of Delaware HMO/PPO
- Coventry Health Care of Virginia
- CIGNA Indemnity
- Great-West Healthcare POS/CIGNA
- CIGNA POS/Network POS
- CIGNA HMO & Network (HMO)
- CFBCBS (NCA) Indemnity
- CFBCBS Maryland Indemnity or PPO
- CFBCBS Maryland Point of Service Plan (MPOS)
- CFBCBS Blue Choice Opt Out Plus Open Access (POS)
- CFBCBS BlueChoice HMO
- Aetna Medicare Advantage HMO & PPO Plans
- Aetna Student Health Insurance
- Aetna Quality Point of Service (POS)
- Aetna Elect Choice/ EPO (Aetna Health Fund) Innovation Health: Network Only Plus
Videos
Education
Fellowship Program: MedStar Georgetown University Hospital (1999)
Residency Program: MedStar Georgetown University Hospital (1996)
Medical School: Medical College of Wisconsin (1993)