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Dr. Daniel O'Brien, MD
Gastroenterology* Age 43
Dr. Daniel O'Brien, MD

Offers telehealth

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Dr. Daniel O'Brien, MD is a Gastroenterologist in Danbury, CT.
Dr. Daniel O'Brien, MD
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Dr. Daniel O'Brien, MD

Gastroenterology* Age 43
Danbury, CT
Accepting new patients
18 years of experience

Offers telehealth

Dr. Daniel O'Brien, MD is a Gastroenterologist in Danbury, CT.
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About

Dr. O'Brien graduated from State University of New York Downstate Health Sciences University College of Medicine. Dr. Daniel O'Brien, MD is a Gastroenterologist in Danbury, CT and has 18 years experience. Dr. O'Brien currently practices at Practice and is affiliated with Danbury Hospital. Dr. O'Brien has experience treating conditions like Anal or Rectal Pain, Hemorrhoids and Gastroptosis among other conditions at varying frequencies. Dr. O'Brien's office accepts new patients and telehealth appointments. Dr. O'Brien is board certified in Gastroenterology and accepts multiple insurance plans.

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Experience Check

Enter a condition or procedure
Anal or Rectal Pain
Hemorrhoids
Gastroptosis
Anal or Rectal Pain
Hemorrhoids
Gastroptosis
Anal or Rectal Pain
Hemorrhoids
Gastroptosis
Constipation
Heartburn
Intestinal Diverticulosis
Diaphragmatic and Hiatal Hernia
Nausea
  • View other providers who treat Nausea
Intestinal Ulcer
Rigid Proctosigmoidoscopy
Flexible Sigmoidoscopy
Manometry
Unexplained Weight Loss
Congenital Anomaly Intestine
Abdominal Pain
Reflux Esophagitis
Removal or Destruction of Rectal or Intestinal Tumor (incl. Colonoscopy, Proctosigmoidoscopy, Sigmoidoscopy and Control of Hemorrhage)
Colorectal Polyp
Gastroesophageal Reflux Disease (GERD)
Chronic Gastritis
Gastritis
Esophagitis
Duodenal Polypectomy
Non-Alcoholic Fatty Liver Disease
Endoscopy
Colonoscopy
Barrett's Esophagus
Gastric Ulcer
Gas-Bloat Syndrome
Colonoscopy, Proctosigmoidoscopy, and Sigmoidoscopy
Gastrointestinal Bleeding
Diarrhea
  • View other providers who treat Diarrhea
Intestinal Obstruction
Anemia
  • View other providers who treat Anemia
Vomiting Disorders
Esophageal Motility Disorders
Inflammatory Bowel Disease
Ulcerative Colitis
Duodenitis
Dysphagia
Noninfectious Gastroenteritis and Colitis
Irritable Bowel Syndrome
Crohn's Disease
Vitamin_Deficiency
Esophageal Ulcer
Gastrointestinal Malabsorption
Celiac Disease
Duodenal Ulcer
Hypokalemia
Hemorrhoidectomy or Excision of Anal Tags
Acidosis
  • View other providers who treat Acidosis
Acute Deep Vein Thrombosis (DVT)
Acute Gastritis
Acute Pharyngitis
Acute Venous Embolism Thrombosis
ADHD and-or ADD
Alcoholic Fatty Liver
Alkalosis
All Headaches (incl. Migraine)
All Types of Food Poisoning
Anxiety
  • View other providers who treat Anxiety
Arthritis
Arthritis of the Elbow
Ascites
  • View other providers who treat Ascites
Asthma
  • View other providers who treat Asthma
Atherosclerosis
Back Pain
Barretts Esophagus with Dysplasia
Bedsores
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Benign Neoplasm of the Digestive System
Bile Duct Obstruction
Blood in Urine (Hematuria)
Bowel Strangulation
Bronchiectasis
Candidiasis of Skin and Nails
Chest Pain
Cholangitis
Chronic Neck Pain
Chronic Pain
Chronic Sinusitis
Cirrhosis
Colon Cancer
Colon Disorders
Congenital Anomaly Esophagus
COPD (Chronic Obstructive Pulmonary Disease)
Cough
  • View other providers who treat Cough
Deep Vein Thrombosis (DVT)
Dehydration
Diabetes Type 1
Diabetes Type 2
Diabetes With Renal Manifestations
Diabetic Polyneuropathy
Difficulty With Walking
Diffuse Esophageal Spasm
Dizziness
Dry Eyes
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Dry Skin
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Duodenal Cancer
Dysentery
Dyslipidemia
E. coli Food Poisoning
Eczema and Contact Dermatitis
Emphysema
Enlarged Prostate (BPH)
Enteritis
Eosinophilic Esophagitis
Eosinophilic Gastritis
Esophageal Achalasia and Cardiospasm
Esophageal Varices
Familial Adenomatous Polyposis
Fever
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Fibromyalgia
Gait Abnormality
Gallstones
Gastrojejunal Ulcer
Gastroparesis
Gout
  • View other providers who treat Gout
Headache
  • View other providers who treat Headache
Heart Disease
Hemochromatosis
Hepatitis B - Immune Response
Hepatitis C
Hereditary Amyloidosis
Hernia
  • View other providers who treat Hernia
Hiatal Hernia
Hidradenitis Suppurativa
Human Immunodeficiency Virus (HIV)
Hyperkalemia
Hyperlipidemia
Hypertension
Hypotension
Hypotension (Excluding Maternal)
Hypothyroidism
Hypoxemia
Indigestion
Infectious Diarrheal Disease
Intestinal Diverticulitis
Intestinal Prolapse
Ischemic Colitis
Itchy Skin
Lactose Intolerance
Leg and Foot Ulcers
Limb Swelling
Lipid Disorders
Liver Damage from Alcohol
Long COVID Disorder
Low Back Pain
Malaise and Fatigue
Mallory-Weiss Syndrome
Malnutrition
Menstrual Disorders
Migraine
  • View other providers who treat Migraine
Neoplasm of Gastrointestinal Tract
Non-Neonatal Jaundice
Obesity
  • View other providers who treat Obesity
Osteoarthritis
Osteoarthritis of Foot
Osteoarthritis of Shoulder
Osteoarthritis of Spine
Osteopenia
Osteoporosis
Overweight
Painful Urination (Dysuria)
Pancreatitis
Peptic Ulcer
Peripheral Nerve Disorders
Pharyngitis
Polyneuropathy
Polyuria
  • View other providers who treat Polyuria
Pouchitis
Primary Biliary Cholangitis
Proctoptosis
Pyloric Stenosis
Rash
  • View other providers who treat Rash
Rectal Prolapse
Rectal Ulcer
Restless Leg Syndrome
Retroperitoneum Cancer
Sexually Transmitted Diseases (STDs)
Shortness of Breath
Sinus Bradycardia
Sinus Tachycardia
Sinusitis
Sleep Apnea
Spleen Cyst
Splenomegaly
Stomach Stenosis
Thyroid Goiter
Tobacco Use Disorder
Upper Digestive Tract Cancer
Urinary Incontinence
Urinary Tract Infection (UTI)
Venous Insufficiency
Vertigo
  • View other providers who treat Vertigo
Viral Hepatitis
Vitamin B Deficiency
Vitamin B12 Deficiency
Vitamin D Deficiency
Wheezing
  • View other providers who treat Wheezing
Anoscopy
  • View other providers who treat Anoscopy
Colon Cancer Screening
Colorectal Cancer Screening
Diabetes Counseling
Electrocardiogram (EKG)
Fecal Occult Blood Test for Colorectal Cancer
Gallbladder Scan
Hepatitis A Screening
Hepatitis B Virus Screening
Hepatitis C Virus Screening
Hepatitis Screening
Impedance Testing
Instrumental Diagnostic Evaluation for Dysphagia
Liver Biopsy
Liver Function Test
pH Probe
  • View other providers who treat pH Probe
Screening Colonoscopy
Sigmoidoscopy
Ultrasound, Endoanal
Ultrasound, Esophageal
VAP Lipid Testing
Wireless pH Testing

Insurance Accepted

* Please verify this information when scheduling an appointment.
  • Blue Cross and Blue Shield
  • Medicare
  • HealthyBlue 2.0
  • Medicaid
  • MagnaCare
  • Curative EPO
    Curative PPO
    Curative PPO Plus
  • Aetna
  • Harvard Pilgrim Health Care PPO
  • First Health (Coventry Health Care)
  • Choice Care PPO
  • Empire Blue Cross Blue Shield
  • Connecticare
  • Locals (any local)
  • MultiPlan PPO
  • Commercial Insurance Company
  • Cigna
  • Oxford Health Plans
  • United Healthcare
  • Catastrophic Pathway X Enhanced-CT HMO

Locations

  1. 1 Danbury Hospital Medical Arts Center (Dhmac)
    111 Osborne St, Danbury, CT 06810
    Icon Directions Right Arrow Directions Phone Icon (203) 739-7038
  2. 2 Nuvance Health Medical Practice Pc-Carmel Ny
    150 Route 52, Carmel, NY 10512
    Icon Directions Right Arrow Directions Phone Icon (203) 739-7038
  3. 3 Danbury Hospital
    24 Hospital Ave, Danbury, CT 06810
    Icon Directions Right Arrow Directions Phone Icon (203) 739-7038
  4. 4 Ridgefield Surgical Center LLC
    901 Ethan Allen Hwy, Ridgefield, CT 06877
    Icon Directions Right Arrow Directions Phone Icon (203) 739-7038

Patient Satisfaction

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Dr. O'Brien's Office & Staff

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Experience with Dr. O'Brien

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  • How well provider listens and answers questions
  • Hpends appropriate amount of time with patients

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Telehealth Options
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(203) 739-7038

About Me

Specialties*
Internal Medicine
Gastroenterology
Specialties*
  • *Sharecare does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.
Common Questions and Answers
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Frequently Asked Questions

Find contact information here to make an appointment.

A list of accepted insurance providers is available on the Sharecare insurance check. It is always a good idea to verify your insurance when making an appointment.

New patients are generally accepted by Dr. Daniel O'Brien, MD. To arrange an appointment, call the number on Dr. O'Brien's profile.

Dr. O'Brien frequently treats the following conditions: Anal or Rectal Pain, Hemorrhoids and Gastroptosis. See more on Sharecare.

Dr. Daniel O'Brien, MD is affiliated with Danbury Hospital.

Yes, Dr. Daniel O'Brien, MD holds board certification in Gastroenterology.

Education
Medical Education
  • State University of New York Downstate Health Sciences University College of Medicine
    2008
Medical Education
Board Certifications
  • Gastroenterology
Board Certifications
What’s a board certification and why is it important that my provider has one?

A board certification represents a provider’s dedication to ongoing training in one or more specialties, including the completion of intensive exams. While not all specialties have board certifications, if your provider does have one they’ve taken the extra step to master their specialty and to keep up with the latest advancements in their field.
Fellowship Hospital
  • SUNY Downstate
Fellowship Hospital

Hospital Affiliations

  • Danbury Hospital

    24 Hospital Ave, Danbury, CT

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