Daniel Patrick O'Brien, M.D.
Gastroenterology Internal Medicine
Daniel O'Brien, M.D. has practiced internal medicine for 18+ years, working in group practice. He has been practicing since 2008 — over 18 years. Gastroenterologists diagnose and treat digestive system disorders including GERD, irritable bowel syndrome (IBS), and more.
Data updated 2014-09-09 on CMS NPPES
Contact & Location
Practice Location
111 Osborne St, Danbury, CT 06810-6043
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Gastroenterologists diagnose and treat digestive system disorders including GERD, irritable bowel syndrome (IBS), inflammatory bowel disease (Crohn's, ulcerative colitis), liver disease, pancreatitis, and colon polyps. They perform endoscopies and colonoscopies.
Taxonomy: 207RG0100X
Virtual Internal Medicine Care With Daniel O'Brien
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Daniel O'Brien for follow-ups, medication reviews, and ongoing care — no travel to Danbury required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes.
Frequently Asked Questions
Common questions about Daniel O'Brien
NPI records show Dr. O'Brien as active with telehealth listed in Danbury, CT. Note: NPI status alone doesn't confirm open availability — always call ahead. Phone: (203) 739-7038.
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